JP2020121992A - Preparation method of seed formulation by iron coating - Google Patents

Abstract

PROBLEM TO BE SOLVED: To quickly elute a herbicidal compound in a herbicidal composition to the outside of a seed system without causing chemical damage to a crop itself, particularly paddy rice, and weeds generated in the seed treatment, particularly weeds in paddy fields. Provided is a method for producing a seed preparation, which can secure a herbicidal compound concentration that can be practically controlled. SOLUTION: The method for producing a seed preparation by iron coating, 1) a step of treating seeds with iron powder, 2) a step of treating seeds with a herbicidal composition, and 3) stopping the oxidation reaction of treated iron powder. A method for producing an iron-coated seed preparation, which comprises carrying out the steps 1) and 2) before the step 3). [Selection diagram] None

Description

The present invention relates to a method for treating a herbicidal composition on a seed with an iron coating, a seed preparation with an iron coating treated with the herbicidal composition according to the method, and a weed characterized by sowing the seed preparation on a soil surface. Regarding control methods.

As a method for cultivating paddy rice, transplanted paddy rice cultivation for transplanting raised seedlings and direct-seeded paddy rice cultivation for direct seeding are widely known.

As direct seeding paddy rice cultivation, flooded direct seeding paddy rice cultivation and dry rice direct seeding paddy rice cultivation are known. A method of coating seeds with iron powder, calcium peroxide or molybdenum compound is also generally known. In particular, iron-coated seeds coated with iron powder have rapidly spread in recent years because they can reduce the risk of bird damage and floating seedlings and can be surface-sown (Non-Patent Document 1).

One of the major problems in direct seeding cultivation of iron coated seeds is weed control. Since direct seeding paddy rice cultivation has a longer cultivation period than transplanted paddy rice cultivation, it is necessary to control weeds for a longer period of time. Therefore, the herbicide is applied more frequently and labor is required, and labor saving of weed control is desired.

One of the effective methods for saving pesticide application is seed treatment, and seeds treated with a fungicide, seeds treated with an insecticide and seeds treated with a plant growth agent are widely known. (Patent documents 1-3). Patent Document 4 is to solve the problem of increasing the coating strength of iron powder-coated rice seeds, by adding sulfate or chloride to the rice seeds in addition to the iron powder, by promoting the oxidation of the metal iron powder Disclosed is a method for improving the coating strength of paddy rice seeds. Further, there is also known a technique of treating an iron-coated rice seed with an insecticide or a bactericide, and in Patent Document 5, the rice seed is surface-treated with iron powder and at the same time surface-treated or immersed with a disease resistance inducer. A method is disclosed. Patent Document 6 describes a method of treating rice seeds with a coating material such as iron powder and a bactericide or insecticide.

Generally, in order to quickly dissolve the herbicidal active ingredient into the paddy water, a high formulation technology such as selection of an appropriate wetting agent and dispersant is required (Patent Document 7).

The method of controlling weeds by a plant seed treated with a herbicide is typically, for example, a herbicide-containing adhesive resin layer containing a herbicide and optionally a surfactant and/or an inorganic auxiliary agent. The use of rice seeds coated with a herbicide (Patent Document 8) can be mentioned. This seed has an adhesive resin layer, a herbicide [herbicide active ingredient (herbicide component) or herbicide formulation], an adhesive resin aqueous solution containing a surfactant and an inorganic auxiliary agent on the surface of rice paddy seeds. After coating, it is produced by forced drying or air drying to form a film. The adhesive resin layer comprises one or more components of a water-insoluble or water-soluble adhesive resin, or one or more components of a water-soluble adhesive resin and one or more components of a water-insoluble resin. Since the content of the water-soluble adhesive resin and the water-soluble adhesive resin is adjusted, the elution rate of the herbicidal component can be adjusted, and the effect is announced when the elution time of the herbicidal component can be controlled. ing.

JP, 2009-249358, A WO 01/13722 Special table 2011-510957 gazette JP, 2005-192458, A JP, 2014-070033, A JP, 2005-139390, A Patent No. 3781487 JP-A-8-275620

Iron coating direct sowing manual 2010 (Agricultural and Food Industry Technology Research Organization)

However, the disease resistance inducer as described in Patent Document 5 is a drug having an action of suppressing the disease by inducing resistance of the plant itself to pathogenic bacteria ([0009] of Patent Document 5). , The seed itself is treated to exert its effect, for example, a fungicide, an insecticide and the like. Further, in [0026] of Patent Document 5, there is a description that "a pesticide such as an insecticide and a herbicide used in rice cultivation can be used in combination in the method of the present invention." This means that pesticides such as insecticides and herbicides are used together when sowing seeds treated with the disease resistance inducer. Therefore, coating of seeds with a herbicidal composition and seeds coated with a herbicidal composition are not specifically known.

In addition to the herbicides, not only special resins such as water-soluble adhesive resins and water-insoluble adhesive resins but also expensive interfaces are used to prepare herbicide-coated rice hull seeds as described in Patent Document 8. Activators and inorganic auxiliaries are used in the coating solutions of the examples. Furthermore, the herbicide-coated rice seed seeds of any of the examples are excellent in that they are not aggregated with each other, but unlike iron-coated seeds, the true specific gravity is not sufficiently heavy, so that there is no floating seedling suppression effect, bird damage. Since the preventive effect is unknown, it is not sufficient as seeds for direct seeding of rice.

Therefore, until now, no example of a practically used seed preparation treated with a herbicidal composition by a simple treatment method is known. In particular, there is no specific description and no examples of a method for controlling weeds, which comprises treating seeds with an herbicidal composition together with an iron coating.

In the existing seed treatment, the drug used is essentially absorbed by the seed to exert its effect, or the purpose is to control pests in the environment near the seed. , The agents used for seed treatment have been limited to fungicides, insecticides and plant growth agents, which are less likely to cause phytotoxicity. It is desired that the herbicidal composition is not absorbed by the seed to be treated and selectively acts on the target weed, not on the seed, but such a technique has not been known until now. unknown. Further, when treating the seed with the herbicidal composition, it is required that the agent to be treated is not absorbed by the seed and is rapidly eluted out of the seed system such as paddy water. Further, the risk of phytotoxicity of existing herbicidal compositions on crop seeds is extremely high. Therefore, according to the conventional seed treatment method, it is extremely difficult to put the seed treated with the herbicidal composition into practical use. Therefore, it is considered difficult to put into practical use a seed formulation in which a herbicide is treated together with an iron coating by the conventional technique. Further, in the herbicide, since the seed-treated herbicide is present in the vicinity of the seed at a high concentration, the occurrence of phytochemical damage to the crop itself related to the seed is a serious problem. In fact, even if the existing iron-coated seeds were treated with a commercially available herbicidal composition, the sufficient herbicidal effect was not obtained, and in some cases, the rice crop itself was usually phytotoxic. From such a background, it was difficult to practically apply the herbicide to the iron-coated seeds and the weed control with the seeds treated with the herbicide.

The subject of the present invention is that the agrochemical component of the herbicidal composition (herbicidal compound) is rapidly dissolved out of the seed system without causing phytotoxicity to the crop itself, especially paddy rice, and weeds generated, especially paddy fields. In order to be able to control the weeds in the practical use, to secure the concentration of the required amount of pesticide components for a required period, the method of treating the herbicidal composition to seeds by iron coating, the iron coating treated with the herbicidal composition It is intended to provide a seed treatment formulation and a method for controlling weeds, which comprises sowing the seed formulation on a soil surface.

As a result of intensive studies to solve the above-mentioned problems, the present inventors have shown that in the step of producing a seed preparation by iron coating, a properly formulated herbicidal composition, before the oxidation reaction of iron powder is stopped. The iron-coated seed preparation obtained by completing the seed treatment is surprisingly compared with the seed preparation in which the herbicidal composition is treated on the iron-coated seed in which the oxidation reaction has been completed and completed. It was found that the herbicide component does not cause phytotoxicity against seeds and its growth, by improving the diffusion of the herbicide component in water significantly and obtaining practical herbicidal performance, and completed the present invention. did.

That is, the present invention is as follows [1]-[16].
[1]
1) a step of treating seeds with iron powder,
2) a step of treating the seed with the herbicidal composition and 3) a step of stopping the oxidation reaction of the treated iron powder,
A method for producing an iron-coated seed preparation, which comprises performing steps 1) and 2) before step 3).
[2]
2) The production method according to [1], wherein after performing the step of treating the seed with the herbicidal composition, 1) performing the step of treating the seed with iron powder.
[3]
1) After performing the step of treating the seeds with iron powder and before stopping the oxidation reaction of the iron powder, 2) performing the step of treating the seeds with the herbicidal composition, [1] Manufacturing method.
[4]
The production method according to [1], wherein 1) the step of treating the seed with iron powder and 2) the step of treating the seed with the herbicidal composition are carried out simultaneously.
[5]
The herbicidal composition contains at least one herbicidal compound selected from the group consisting of (A1) a whitening type herbicidal compound or a salt thereof and (A2) an acetolactate synthase inhibitor type herbicidal compound or a salt thereof, The manufacturing method according to any one of [1] to [4].
[6]
(A1) The whitening herbicidal compound is a pyrazole herbicidal compound or a salt thereof, a triketone herbicidal compound or a salt thereof, and 6-chloro-3-(2-cyclopropyl-6-methylphenoxy)pyridazin-4-yl. The production method according to [5], which is at least one selected from the group consisting of morpholine-4-carboxylate and salts thereof.
[7]
(A2) The acetolactate synthase-inhibiting herbicidal compound is at least one selected from the group consisting of a sulfonylurea herbicidal compound or a salt thereof and a pyrimidinylsalicylic acid herbicidal compound or a salt thereof, [5] Of manufacturing.
[8]
(A1) The whitening herbicidal compound is at least one selected from the group consisting of pyrazolate and 6-chloro-3-(2-cyclopropyl-6-methylphenoxy)pyridazin-4-ylmorpholine-4-carboxylate. The production method according to [5] or [6].
[9]
(A1) The production method according to [5], [6] or [8], wherein the whitening-type herbicidal compound is pyrazolate.
[10]
(A2) The production method according to [5] or [7], wherein the acetolactate synthase-inhibiting herbicidal compound is a sulfonylurea herbicidal compound or a salt thereof.
[11]
In the step of treating the seed with the herbicidal composition, in addition to treating the seed with the herbicidal composition, the seed is treated with at least one of an insecticidal composition, a fungicidal composition and a plant growth agent, The manufacturing method according to any one of [1] to [10].
[12]
The production method according to any one of [1] to [11], wherein the seed is a paddy rice seed.
[13]
An iron-coated seed preparation obtained by the production method according to any one of [1] to [12].
[14]
The iron-coated seed preparation according to [13], wherein the seed is paddy rice seed.
[15]
A method for controlling weeds, which comprises sowing the iron-coated seed preparation according to [13] on a soil surface.
[16]
A method for controlling weeds, comprising sowing the iron-coated seed preparation according to [14] on the surface of a paddy field soil.

By sowing the seed preparation produced according to the method for producing an iron-coated seed preparation of the present invention on the soil surface, a herbicidal effect is imparted. Particularly in the case of paddy rice seeds, when the seeds are sown on the surface of the paddy field, surprisingly, the seed-treated herbicidal active ingredient can be rapidly eluted into water. Therefore, various weeds that cause problems in paddy fields, for example, grass weeds such as Taenia japonica; sesame grass weeds such as Azena and Abume; It is possible to control weeds such as Urikawa, Omodaka and Heraomodaka, and it does not show any harmful phytotoxicity to seeds. Further, since it is possible to treat the herbicidal active ingredient at the same time as producing the iron-coated seed, it is possible to omit a part of the treatment with the herbicide in Honda, which can contribute to the reduction of the control work amount.
It is also possible to apply the method for producing a seed preparation by iron coating of the present invention to seeds whose germination has been suppressed by, for example, heat treatment.
Therefore, the method for preparing a seed preparation by iron coating, which is treated with the herbicidal component of the present invention, and the prepared seed preparation can reduce the labor required for weed control work.

Next, a method for producing a seed preparation by iron coating which is the first invention of the present application and a seed preparation by iron coating obtained by the production method which is the second invention will be described.
Unless otherwise specified, each term used in the claims and specification of the present application is based on the definition generally used in the technical field.

The seed preparation means seeds which have been formulated by using the agrochemical composition. Therefore, the seed treated with the herbicidal composition together with the iron coating is an iron-coated seed preparation.

The method for producing a seed preparation by iron coating according to the present invention,
1) a step of treating seeds with iron powder,
2) a step of treating the seed with the herbicidal composition and 3) a step of stopping the oxidation reaction of the treated iron powder,
It is characterized in that step 1) and step 2) are carried out before step 3).
The seed treatment method in the seed treatment step of the above step 1) and step 2) is a seed treatment technique known in the art within the scope of the present invention, for example, seed dressing method, seed coating method, seed dusting method. , The seed dipping method and the seed pelleting method can be used. Among them, it is preferable to use the seed coating method in both step 1) and step 2).

As the seed coating method used in step 1) of the present invention (preparation of seed preparation by iron coating), any method known in the art can be used. For example, the method is described in the Iron Coating Direct Water Seeding Manual 2010 (Agricultural and Food Industry Technology Research Institute). More specifically, after soaking the dried seeds at room temperature for 3 to 4 days, excess water is drained, and the seeds are coated by adding a mixed powder of iron powder and calcined gypsum while adding water to the seeds. In addition, it is usually possible to dress with a smaller amount of calcined gypsum as a finish. Then, the seed is allowed to stand for a certain period of time under the condition that the oxidation reaction proceeds in the iron component of the coated seed to form iron hydroxide, that is, iron rust on the seed. Seed formulation, iron rust is formed on the coated seeds, after a sufficient hardness is obtained, the seeds are subjected to a drying step at a temperature condition of 40°C or lower that does not affect the germination of the seeds, It is obtained by evaporating the water on the seed surface to stop the oxidation reaction (step 3). The time required to stop the oxidation reaction varies depending on the temperature and humidity of the outside air, but it is desirable to let it stand for one day or more.

Examples of the iron powder used in the present invention include reduced iron powder, atomized iron powder, electrolytic iron powder, iron oxide powder, and the like, and a mixture of two or more kinds thereof can also be used. In the present invention, it is preferable to use reduced iron powder, iron oxide powder or a mixture of reduced iron powder and iron oxide powder. In addition, commercially available iron powder can be used. Specifically, for example, DSP317 iron powder (manufactured by DOWA (IP) Creation Co., Ltd.), iron powder for agriculture (manufactured by Daitetsu Kogyo Co., Ltd.), iron powder for agriculture (manufactured by Tetsugen) and the like can be mentioned. The iron powder may have any particle size, and preferably has a particle size of 10 to 100 μm. Particularly, the reduced iron powder preferably has a small particle size of 100 μm or less. The calcined gypsum used as necessary may be powdery calcium sulfate hemihydrate (CaSO ₄ .1/2H ₂ O), and a commercially available product can be used.
The amount of iron powder used for the treatment is preferably 0.05 to 1.0 part by weight, and more preferably 0.2 to 0.5 part by weight, relative to 1 part by weight of the seed. The amount of calcined gypsum mixed with the iron powder is preferably 1 to 25% with respect to 100% of the iron powder, and more preferably 5 to 10%. The amount of calcined gypsum used for finishing is preferably 0 to 10%, and more preferably 0.1 to 5% with respect to 100% of iron powder.

In the present invention, water and oxygen are required for the oxidation reaction of the iron component of the coated seed. The water required for the oxidation reaction is supplied from the water contained in the seed by preliminarily immersing the seed, the water added during the granulation of the iron-coated seed, or the water contained in the herbicidal composition itself or a diluted solution thereof. It Oxygen required for the oxidation reaction is supplied from the oxygen contained in the atmosphere of the iron coating environment and the water used. It is generally said that the oxidation reaction is stopped when the thickness of the water layer on the iron surface becomes small and when the relative humidity of the air becomes about 50% or less. Therefore, in order to stop the oxidation reaction, It is necessary to control the water content of the iron-coated seed by subjecting it to a drying step and reduce it if necessary. The oxidation reaction can be usually performed at room temperature by appropriately supplying water to the seeds. In order to promote the oxidation, the seed is subjected to a process of repeating hydration and drying, and the reaction proceeds usually by allowing the seed to stand for 3 to 7 days. This method is a preferable method for detecting the heat generation due to the progress of the oxidation reaction.

In the present invention, in the oxidation reaction of the iron component of the coated seed, it is necessary to proceed with the oxidation until the treated iron powder is oxidized to form iron hydroxide, that is, iron rust, and the iron component is not lost from the seed. It is possible to confirm and judge whether the oxidation reaction is proceeding or stopped by observing the fever state of the seeds. That is, "termination of the oxidation reaction of the iron component" means, for example, when the temperature of the seed is observed with a non-contact thermometer or the like, no change in the temperature of the seed is observed at room temperature and 50% relative humidity. is there. However, when the formation of iron rust is insufficient, when the water content of the coated seed is high, the temperature change may not be observed due to the heat of vaporization, so iron powder becomes iron rust, and It is necessary to evaluate it in the state that it is uniformly coated.

In the first invention of the present application, a step (step 2) of treating the seed with the herbicidal composition is performed before the oxidation reaction of the iron powder coated on the seed is stopped. As one aspect, after treating the seed with the herbicidal composition (step 2), the seed can be treated with iron powder (step 1)). As one aspect, the seeds may be treated with the herbicidal composition (step 2) after the seeds are treated with the iron powder (step 1) and before the oxidation reaction of the iron powder is stopped. In one aspect, the step of treating seeds with iron powder (step 1)) and the step of treating seeds with a herbicidal composition (step 2)) can be carried out simultaneously. That is, the seeds can be treated with the iron powder and the herbicidal composition at the same time.

The seed coating method used in step 2) of the present invention may be any method known in the art. For example, the seeds can be treated with the herbicidal composition by introducing the seeds into a stirrer such as a mixer and then adding the herbicidal composition to the stirrer in a state where the seeds are fluidized and stirring at room temperature. The stirring time can be appropriately selected depending on the weight of the seeds to be added, but it is preferable that the treated seeds are usually allowed to stand when the coating becomes uniform in appearance.

As a method for simultaneously carrying out step 1) and step 2), for example, after the seeds are put into a stirrer such as a mixer, the seeds are made to flow and iron powder, and if necessary, plaster of gypsum and herbicidal composition The mixture is put into a stirrer, by stirring at room temperature, a method of treating the herbicidal composition to seeds, or after the seeds are put into a stirrer such as a mixer, in a state where the seeds are fluidized, with a herbicidal composition. A method of treating seeds with the herbicidal composition by alternately charging iron powder and optionally a mixture of calcined gypsum into a stirrer and stirring at room temperature. The stirring time can be appropriately selected depending on the weight of the seeds to be added, but it is preferable that the treated seeds are usually allowed to stand when the coating becomes uniform in appearance.

The herbicidal composition used in the present invention is, in addition to the agrochemical active ingredient (herbicidal compound) which is the active ingredient, within the scope of the present invention, based on the agrochemical formulation technology known in the art, for example, Auxiliary components such as agents, disintegrants, wetting agents, dispersants, thickeners, defoamers, antifungal agents, solvents, stabilizers, colorants, extenders, preservatives, and/or pH adjusters It can be added.

As the binder used in the herbicidal composition of the present invention, for example, dextrin, polyvinyl alcohol, polyvinylpyrrolidone, salts of carboxymethyl cellulose, methyl cellulose, gum arabic, polyethylene glycol or its derivatives, tab powder, bentonite, lignin sulfonate, Examples thereof include carboxylic acid or sulfonic acid type polysoap. Among these, lignin sulfonate or carboxylic acid or sulfonic acid type polysoap is suitable because it can also serve as a dispersant.

The disintegrant, wetting agent or dispersant used in the herbicidal composition of the present invention is not particularly limited as long as it is used for ordinary pesticides, anionic surfactant, nonionic surfactant, cationic. Any surfactant such as an ionic surfactant or a zwitterionic surfactant can be used, and one or more of these can be used.

Examples of the anionic surfactant used in the herbicidal composition of the present invention include alkyl phosphate ester salts, alkyl sulfate ester salts, polyoxyalkylene alkyl ether phosphate ester salts, polyoxyethylene alkyl ether sulfate ester salts, and alkyl aryls. Phosphate ester salt, alkylaryl sulfate ester salt, polyoxyalkylene alkylaryl ether phosphate ester salt, polyoxyalkylene alkylaryl ether sulfate ester salt, alkylphenol phosphate salt, alkylphenol phosphate ester salt, alkylphenol sulfate salt, alkylphenol sulfate ester salt, polyoxy Alkylene alkylphenol phosphate, polyoxyalkylene alkylphenol phosphate ester salt, polyoxyalkylene alkylphenol sulfate ester salt, polyoxyalkylene alkylphenol sulfate ester salt, styrylphenol phosphate salt, styrylphenol phosphate ester salt, styrylphenol sulfate salt, styrylphenol sulfate ester salt, Polyoxyalkylene styryl phenol phosphate, polyoxyalkylene styryl phenol phosphate ester salt, polyoxyalkylene styryl phenol sulfate salt, polyoxyalkylene styryl phenol sulfate ester salt, distyryl phenol phosphate salt, distyryl phenol phosphate ester salt, distyryl phenol Sulfate, Distyrylphenol Sulfate, Polyoxyalkylene Distyrylphenol Phosphate, Polyoxyalkylene Distyrylphenol Phosphate, Polyoxyalkylene Distyrylphenol Sulfate, Polyoxyalkylene Distyrylphenol Sulfate, Tristyryl Phenol phosphate, tristyrylphenol phosphate ester salt, tristyrylphenol sulfate salt, tristyrylphenol sulfate ester salt, polyoxyalkylene tristyrylphenol phosphate salt, polyoxyalkylene tristyrylphenol phosphate ester salt, polyoxyalkylene tristyrylphenol sulfate Examples thereof include salts, polyoxyalkylene tristyrylphenol sulfate ester salts, alkyl succinate sulfonates, dialkyl succinate sulfonates, polyoxyalkylene dialkyl succinate sulfonates, and the like. Oxyalkylene alkyl ether phosphate ester salt, alkylaryl phosphate ester salt, polyoxya Rukilen alkylaryl ether phosphate salt, alkylphenol phosphate salt, styrylphenol phosphate ester salt, polyoxyalkylene styrylphenol phosphate ester salt, distyrylphenol phosphate salt, distyrylphenol phosphate ester salt, polyoxyalkylene distyrylphenol phosphate salt, Examples thereof include polyoxyalkylene distyrylphenol phosphate ester salt, tristyrylphenol phosphate salt, tristyrylphenol phosphate ester salt, polyoxyalkylene tristyrylphenol phosphate salt, and polyoxyalkylene tristyrylphenol phosphate ester salt.

Examples of the nonionic surfactant used in the herbicidal composition of the present invention include aliphatic alcohol alkylene oxide adducts, polyalkyleneoxy fatty acid esters, sorbitan-based surfactants or alkylene oxide adducts thereof, and polyglycerin fatty acid esters. , Alkylpolysaccharide-based surfactants, sucroglyceride, polyoxyalkylene alkyl ether, polyoxyethylene alkyl ether, polyoxyalkylene alkylaryl ether, polyoxyalkylene alkylphenol ether, polyoxyalkylene styryl phenol ether, polyoxyalkylene distyryl Phenol ether or polyoxyalkylene tristyrylphenol ether and the like can be mentioned, preferably polyoxyalkylene alkyl ether, polyoxyethylene alkyl ether, polyoxyalkylene alkylaryl ether, polyoxyalkylene alkylphenol ether, polyoxyalkylene styrylphenol ether. , Polyoxyalkylene distyrylphenol ether or polyoxyalkylene tristyrylphenol ether.

Incidentally, these ethylene oxide-added type surfactants may contain propylene oxide as a part thereof.

Examples of the cationic surfactant used in the herbicidal composition of the present invention include aliphatic tertiary amines or salts thereof, aliphatic tertiary amines aliphatic amine alkylene oxide adducts or salts thereof, or aliphatic tertiary amines. Examples thereof include quaternary amine salts.

Examples of the amphoteric surfactant used in the herbicidal composition of the present invention include amino acid-type amphoteric surfactants such as sodium laurylaminopropionate; betaine-type amphoteric surfactants such as lauryl dimethyl betaine, stearyl dimethyl betaine, and lauryl dihydroxyethyl betaine. Examples include carboxylate-type amphoteric surfactants such as surfactants; sulfate ester-type amphoteric surfactants; sulfonate-type amphoteric surfactants; and phosphate ester salt-type amphoteric surfactants.

The surfactant used in one embodiment of the herbicidal composition used in the present invention is preferably an anionic surfactant or a nonionic surfactant.

The amount of surfactant used in one embodiment of the herbicidal composition used in the present invention is usually 0.01 to 20% by weight in the herbicidal composition, and preferably 0.1 to 20% by weight. It is 10% by weight.

The thickener used in the herbicidal composition of the present invention is not particularly limited as long as it is usually used in agricultural chemical formulations, for example, white carbon, aluminosilicate, bentonite, montmorillonite, hectorite, attapulgite Minerals or polymeric thickeners such as gum arabic, tragacanth gum, xanthan gum, guar gum, roast bean gum, casein, alginic acid, cellulosic polysaccharides, ethyl cellulose, polyvinyl alcohol, carboxymethyl cellulose, hydroxyethyl cellulose, hydroxypropyl cellulose, carboxymethyl cellulose And the like, and a polymer thickener is preferable, and xanthan gum is more preferable.

The antifoaming agent used in the herbicidal composition of the present invention is not particularly limited as long as it is usually used in agricultural chemical formulations, for example, lower alcohol type such as methanol, ethanol, isopropanol, sec-butanol, butanol. Antifoaming agent; amyl alcohol, diisobutyl carbitol, tributyl phosphate, oleic acid, tall oil, metal soap, low HLB surfactant (for example, sorbitan lauric acid monoester, sorbitan lauric acid triester, polyethylene glycol fatty acid ester, Organic polar compound type defoaming agents such as acetylene glycol derivatives, Pluronic (registered trademark) type nonionic surfactants), acetylene glycol derivatives; surfactant blends of mineral oils, surfactants of mineral oils and fatty acid metal salts Mineral oil-based defoaming agents such as agent blends; silicone resin, silicone resin surfactant blends, and silicone resin defoamers such as inorganic powder blends of silicone resins.

The mildew-proofing agent used in the herbicidal composition of the present invention is not particularly limited as long as it is usually used in agricultural chemical formulations, for example, parachlorometaxylenol, polyhesamethylene biguanide hydrochloride, 1, 2-benzisothiazolin-3-one, methylparahydroxybenzoate, ethylparahydroxybenzoate, propylparahydroxybenzoate, butylparahydroxybenzoate, heptylparahydroxybenzoate, benzylparahydroxybenzoate, paraoxybenzoic acid ester, sorbic acid, orthophenyl Phenol, sodium orthophenylphenate, glutardialdehyde, quaternary ammonium compound, tri-(N-chlorohexyldiazeniumdioxy)-aluminum, tetrahydro-3,5-dimethyl-2H-1,3,5- Thiadiazin-2-thione, 2,5-dimethoxytetrahydrofuran, dimethylolurea, sodium N-methyldithiocarbamate, phenoxyethanol, glyoxal, glutaraldehyde, 1,3,5-tris(2-hydroxyethyl)-1,3,5- Hexahydrotriazine, benzalkonium chloride, phenoxypropanol, tetramethylacetylenediurea, povidone iodine, potassium sorbate, 2-bromo-2-nitropropane-1,3-diol, thiazolone and the like can be mentioned.

The solvent used in the herbicidal composition of the present invention is not particularly limited as long as it is usually used for agricultural chemicals, but it is preferable to use a solvent having a flash point of the second petroleum or higher. For example, alkylbenzene, methylnaphthalene, liquid paraffin, ligroin, kerosene, kerosene, n-decane, isododecane, tetralin, decalin, turpentine oil, pine oil, adipic acid, gluconic acid, maleic acid, lactic acid, benzoic acid, phthalic acid, apple. Acid, fumaric acid, succinic acid, tartaric acid, citric acid, lauric acid, oleic acid, coconut oil fatty acid, cyclohexanone, cyclohexenyl cyclohexanone, acetylacetone, acetophenone, methylbutylketone, ethylene glycol, diethylene glycol, triethylene glycol, propylene Glycol, dipropylene glycol, tripropylene glycol, epichlorhydrin, diglycidyl ete, dioxane, triethyl phosphate, tributyl phosphate, soybean oil, rapeseed oil, sesame oil, rice oil, coconut oil, sunflower oil, sardine oil , Whale oil, dimethyl sulfoxide, N,N-dimethylacetamide, N-methylpyrrolidone and the like.

The colorant used in the herbicidal composition of the present invention is not particularly limited as long as it is usually used for agricultural chemicals, and examples thereof include dyes, and preferably Brilliant Blue FCF, Cyanine Green G or Erio Green G. Is. The amount of the coloring agent used is usually 0.05 to 0.5% by weight, and preferably 0.1 to 0.3% by weight, in the granular pesticide composition.

Examples of the extender used in the herbicidal composition of the present invention include, for example, bentonite, talc, clay, diatomaceous earth, amorphous silicon dioxide, calcium carbonate, and other fine mineral powders commonly used as pesticide carriers such as magnesium carbonate. , Vinyl chloride, chlorinated polyethylene, resin powders such as chlorinated polypropylene, sugars such as glucose, sugar, lactose, carboxymethyl cellulose or salts thereof, starch or derivatives thereof, microcrystalline cellulose, wood flour, rice bran, bran, chaff Examples thereof include powders, coffee bean powder, cellulose powder, licorice powder and other organic substances, sodium sulfate, ammonium sulfate, potassium chloride and other water-soluble inorganic salts, and urea. Examples of the bentonite include Bentonite Hotaka, Fuji (manufactured by Hojun Co., Ltd.), Kunigel V1, V2 (manufactured by Kunimine Industry Co., Ltd.), bentonite KG-1, KA-1 (manufactured by Nippon Bentonite Co., Ltd.). The blending amount of the extender is the minimum amount required excluding the essential components of the herbicidal composition of the present invention, and varies depending on the type of the extender, but usually 0.1 to 90% by weight in the herbicidal composition. %, and preferably 0.5 to 70% by weight.

The preservative used in the herbicidal composition of the present invention is not particularly limited as long as it is usually used for agricultural chemicals, and preferably, sorbic acid, potassium sorbate, parachlorometaxylenol, paraoxybenzoic acid. Butyl or sodium dehydroacetate. The amount of preservative used is usually 0.1 to 3% by weight, and preferably 0.2 to 2% by weight, in the herbicidal pesticide composition.

The pH adjusting agent used in the herbicidal composition of the present invention is not particularly limited as long as it is usually used for agricultural chemicals, and examples thereof include inorganic acids such as hydrochloric acid and phosphoric acid; citric acid, phthalic acid and succinic acid. Organic acids such as; sodium citrate, organic metal salts such as potassium hydrogen phthalate; disodium hydrogen phosphate, sodium dihydrogen phosphate, dipotassium hydrogen phosphate, potassium dihydrogen phosphate, sodium carbonate, potassium carbonate, Inorganic metal salts such as sodium borate; hydroxides such as sodium hydroxide and potassium hydroxide; or organic amines such as triethanolamine, and the like, preferably inorganic acids and inorganic metals. Salts or hydroxides, and more preferably hydrochloric acid, citric acid, succinic acid, sodium hydroxide, potassium hydroxide or sodium carbonate, etc. Moreover, the pH adjuster used may be used alone or in combination of two or more.

The herbicidal composition of the present invention can be produced by a known formulation process such as mixing, granulation, pulverization, and drying, which are used in the production of ordinary pesticide formulations. Further, the herbicidal composition can also be used in a state of being premixed with an oxidation promoter such as iron powder or calcined gypsum which is a material related to iron coating. In this case, the herbicidal composition used in the method for producing a seed preparation by iron coating of the present invention is a herbicidal compound if the seed can be uniformly treated without inhibiting the iron coating property on the seed. However, it usually needs to be formulated into an appropriate formulation. Suitable formulation types and formulation techniques of the herbicidal composition include the following (1) to (9), and the herbicidal composition is microparticulated by wet or dry pulverization, or The seed must be molded so that it can be uniformly coated by dissolving it in an oily solvent. However, formulation types and formulation methods other than these can be used in the present invention as long as good coverage of the drug with the seed can be ensured.
(1) An aqueous dispersion obtained by wet-milling the herbicidal pesticide active ingredient in water, optionally adding an auxiliary ingredient such as a surfactant,
(2) An oily dispersion obtained by wet-milling the herbicidal pesticide active ingredient in a non-polar solvent, optionally adding an auxiliary ingredient such as a surfactant,
(3) A bulk powder obtained by dry-milling the herbicidal pesticide active ingredient together with an auxiliary ingredient such as a surfactant, if necessary,
(4) An aqueous dispersion obtained by dispersing the bulk powder obtained in (3) in water, if necessary, together with an auxiliary component such as a surfactant,
(5) An oily dispersion obtained by dispersing the bulk powder obtained in (3) together with an auxiliary component such as a surfactant in a nonpolar solvent, if necessary.
(6) A liquid preparation obtained by dissolving the herbicidal pesticide active ingredient by adding water and, if necessary, an auxiliary ingredient such as a surfactant,
(7) An emulsion obtained by dissolving the herbicidal pesticide active ingredient in a nonpolar solvent, adding an emulsifier and, if necessary, an auxiliary ingredient such as a surfactant, and dissolving the same.
(8) A bulk powder obtained by dry pulverizing a granular herbicidal composition,
(9) A liquid composition obtained by dispersing and dissolving a granular herbicidal composition in water or a nonpolar solvent, if necessary, with an auxiliary component such as a surfactant added.

In the present invention, the method for producing a seed preparation by iron coating can be applied to seeds of any variety. Seeds to which the present technology can be applied include, for example, paddy rice, wheat, barley, soybean, corn, sugar beet and the like. Preferably, seeding in a flooded state is preferable, and paddy rice is particularly preferable. However, it is preferable to use paddy rice seeds of a variety that has no sensitivity to the herbicidal composition. In the present invention, “not having sensitivity” means that no phytotoxicity occurs in a drug treatment in a flooded state in normal transplant cultivation.
It is clear to those skilled in the art what kind of paddy rice seed is not sensitive to the herbicidal composition, but as the paddy rice seed of the variety which is not sensitive to the herbicidal composition, for example, Koshihikari , Hinohikari, Hitomere, Akitakomachi, Kinuhikari, Nanatsuboshi, Haenuki, Kirara 397, Masashigura, Tsugaru Roman, Nihonbare, etc. In addition, paddy rice seeds that are not sensitive to PPO-inhibiting herbicidal compounds and VLCFAE-inhibiting herbicidal compounds, such as Koshihikari, Hinohikari, Hitomebore, Akitakomachi, Kinuhikari can also be preferably used.
On the other hand, examples of paddy rice seeds of varieties that exhibit sensitivity to the herbicidal composition include, for example, susceptibility to mesotrione and benzobicyclone, Habataki, Takanari, Momiroman, Mizuhochikara, Luriaoba, and surprised rice cake. .. The paddy rice seeds showing sensitivity to these herbicidal compositions are described in, for example, “Crop Science Society of Japan, Kikai 79 (Annex 1)”.

As seeds of paddy rice used in the present invention, seeds in a seedable state can be used. In addition, the iron-coated seed preparation used in the present invention can use not only iron powder but also calcium peroxide, a molybdenum compound and the like as a coating agent.

The herbicidal composition used in the present invention contains, as an active ingredient, any herbicidal compound normally used in paddy fields. Examples of such herbicidal compounds include (A1) a whitening type herbicidal compound, (A2) an acetolactate synthase (hereinafter referred to as ALS) inhibitory herbicidal compound, and (A3) a protoporphyrinogen oxidase (hereinafter referred to as PPO). ) Inhibitory herbicidal compounds and (A4) Very long chain fatty acid elongase (hereinafter referred to as VLCFAE) inhibitory herbicidal compounds are widely known and can be used in the present invention. Among these, it is preferable to include at least one selected from the group consisting of (A1) a whitening herbicidal compound or a salt thereof and (A2) an ALS-inhibiting herbicidal compound or a salt thereof. Hereinafter, these herbicidal compounds will be described, and these herbicidal compounds include their salt forms.

で表される６−クロロ−３−（２−シクロプロピル−６−メチルフェノキシ）ピリダジン−４−イル モルホリン−４−カルボキシレート（以下、化合物（Ｉ）ともいう）などが挙げられる。 The whitening-type herbicidal compound (A1) is a well-known herbicide that whitens and kills weeds. Examples of the whitening-type herbicidal compound in the present invention include a pyrazole-based herbicidal active compound, a triketone-based herbicidal active compound, clomazone (CAS No. 81777-89-1), or the following general formula (I):

And 6-chloro-3-(2-cyclopropyl-6-methylphenoxy)pyridazin-4-ylmorpholine-4-carboxylate (hereinafter, also referred to as compound (I)) and the like.

Examples of the pyrazole herbicidally active compound include pyrazolate, pyrazoxifene, benzophenap and the like, which are respectively described in The Pesticide Manual 13th Edition, pages 844-845, 848-849, 81. These compounds belong to the F2 group of the HRAC classification system.
Examples of the triketone herbicidally active compound include mesotrione, sulcotrione, benzobicyclone, tefryltrione, bicyclopyrone and the like, and they are described in The Pesticide Manual 13th Edition, 631-632, 908-909, p. 80, respectively. Has been done. These compounds belong to the F2 group of the HRAC classification system. Tefryltrione (CAS No. 473278-76-1) and bicyclopyrone (CAS No. 352010-68-5) are also triketone herbicidal compounds.

Clomazone belongs to the F4 group of the HRAC classification system.
The (A2) ALS-inhibiting herbicidal compound is a well-known herbicidal compound that inhibits the synthesis of valine, leucine and isoleucine which are essential amino acids by inhibiting ALS and kills weeds. Examples of the ALS-inhibiting herbicidal compound include sulfonylurea herbicidal compounds, pyrimidinylsalicylic acid herbicidal compounds and triazolopyrimidine herbicidal compounds. These compounds belong to group B of the HRAC classification system.

Examples of the sulfonylurea herbicidal compound include, for example, azimsulfuron, bensulfuron-methyl, cyclosulfamuron, halosulfuron-methyl, ethoxysulfuron, imazosulfuron, pyrazosulfuron-ethyl, chlorimuron-ethyl, shinosulfuron, metsulfuron-methyl, flucetos Ruflon, propyrisulfuron, metazosulfuron, etc. are mentioned, respectively, The-Pesticide Manual 13th Edition 46-47, 73-74, 222-223, 523-524, 386-387, 560-561, 847-848, 161- 162, 184-185, 677-678. Further, flucetosulfuron (CAS No. 412928-75-7), propyrisulfuron (CAS No. 570415-88-2), metazosulfuron (CAS No. 868680-84-6) and the like are sulfonylurea herbicidal compounds. is there.

Examples of the pyrimidinyl salicylic acid-based herbicidal compound include bispyribac, pyribenzoxime, pyriphthalide, pyriminobacmethyl, pyrimisulfan and triafamon, and the like, The Pesticide Manual 13th Edition 96-97, 852-853, 860-861, respectively. , Pages 863-864. Further, pyrimisulfan (CAS No. 221205-90-9), triafamone (CAS No. 874195-61-6) and the like are pyrimidinylsalicylic acid herbicidal compounds.

The triazolopyrimidine herbicidal compounds include, for example, penoxsulam, which is described in The Pesticide Manual 13th Edition, pp. 753-754.
The (A3) PPO-inhibiting herbicidal compound is a well-known herbicidal compound that inhibits PPO and causes browning symptoms to kill weeds. The PPO-inhibiting herbicidal compound is, for example, oxadiaargyl, oxadiazone, pentoxazone and the like, which are respectively described in The Pesticide Manual 13th Edition, pages 725-726, 727-728, 757-758.

The (A4) VLCFAE-inhibiting herbicidal compound is a well-known herbicidal compound that inhibits VLCFAE, inhibits fatty acid synthesis, and kills weeds. The VLCFA-inhibiting herbicidal compounds are, for example, butachlor, pretilachlor, tenilchlor, mefenacet, etc., and they are described in The Pesticide Manual 13th Edition, 118-120, 799-800, 956, 621-622, respectively.

Regarding the prescribed mechanism of action and classification of these herbicidal compounds, for example, “2012 paddy rice-related herbicide test application form (test plan and drug properties)” (Japan Plant Regulator Research Institute) , "HRAC (Herbicide Resistance Action Committee)", "According to HRAC classification on mode of action".

The concentration of the herbicidal compound in the herbicidal composition can be appropriately determined depending on the kind of the herbicidal compound and the formulation form used.
In the treatment of seeds in step 2), the treatment amount of the herbicidal composition can be appropriately determined according to the type of herbicidal compound and the formulation form of the herbicidal composition. For example, the treatment amount of the herbicidal composition can be determined so that 0.01 g to 3000 g, preferably 0.1 g to 1000 g, of the herbicidal compound as an active ingredient is treated per 1 kg of seeds.

In the method for producing a seed preparation by iron coating of the present invention, the seed may be treated with the herbicidal composition alone, and a fungicide, an insecticide, an acaricide, a nematicide, a phytotoxicity reducing agent or a plant growth agent. May be processed simultaneously. The bactericide to be treated at the same time is not limited to these, for example, strobilurin compounds, anilinopyrimidine compounds, azole compounds, dithiocarbamate compounds, phenylcarbamate compounds, organic chlorine compounds, benzimidazole compounds, Phenylamide compounds, sulfenic acid compounds, copper compounds, isoxazole compounds, organic phosphorus compounds, N-halogenothioalkyl compounds, carboxyanilide compounds, morpholine compounds, organotin compounds or cyanopyrrole compounds Etc., and one or more kinds can be used in combination. Pesticides, acaricides, nematicides include, but are not limited to, for example, pyrethroid compounds, organophosphorus compounds, oxime/carbamate compounds, carbamate compounds, neonicotinoid compounds, diacylhydrazine compounds. Compounds, benzoylurea compounds, juvenile hormone compounds, cyclodiene organochlorine compounds, 2-dimethylaminopropane-1,3-dithiol compounds, amidine compounds, phenylpyrazole compounds, organotin compounds, METI compounds , Benzylate compounds, allylpyrrole compounds, dinitrophenol compounds, anthranil diamide compounds, oxadiazine compounds, semicarbazone compounds, tetronic acid compounds, carbamoyltriazole compounds or tetrazine compounds, and the like. 1 They can be used in combination with one another or more.

Specific examples include the following compounds.
That is, azoxystrobin, kresoxim-methyl, trifloxystrobin, methinostrobin, orysasatrobin, oryastrostrobin, pyraclostrobin, pyraclostrobin, pyrostrobin, pyraclostrobin, pyraclostrobin, pyraclostrobin, pyraclostrobin, pyraclostrobin, pyraclostrobin, pyraclostrobin, pyraclostrobin, pyraclostrobin, pyraclostrobin, pyraclostrobin, pyraclostrobin, pyraclostrobin, pyraclostrobin, pyraclostrobin, pyraclostrobin. ) And other strobilurin-based compounds; mepanipyrim, pyrimethanil, cyprodinil and other anilinopyrimidine-based compounds; triadimefon (triadimeol), bittertaneol trifonnamole (triterfume), triflumime (triflumium), triflumizole (triflumizole), triflumizole (triflumisol), triflumizole (triflumizole), triflumizole (triflumizole) , Propiconazole, penconazole, flusilazole, microbutanol, cyproconazole, cloproconazole, tebuconazole, tebuconazole, tebuconazole, tebuconazole, tebuconazole, tebuconazole, tebuconazole, ), fenarimol, imazalil, epoxyconazole, prothioconazole, ipconazole quinoline compounds, and pefurazionate compounds such as pefurazionate; Dithiocarbamate compounds such as maneb, zineb, mancozeb, polycarbamate, probineb, thiram; and dichlorocarbamate compounds such as dietofencarb (dierthocarphenate); (Chlorthalonil), organochlorine compounds such as quintozene; benomyl, thiophanate-methyl, carbendazim (c) Arbendazole) benzimidazole compounds, such as metalaxyl (metalaxyl), metalaxyl -M (metalaxyl-M), oxadixyl (oxadixyl), phenyl including Ofurase (ofurase), benalaxyl (benalaxyl), furalaxyl (furalaxyl), Shipurofuran (cyprofuram) Amide compounds; sulfenic acid compounds such as dichlofluanid; copper compounds such as cupric hydroxide and copper oxyquinoline; hydroxyisoxazoles and the like. Isoxazole-based compounds; organophosphorus compounds such as fosetyl-aluminium and tolclofos-methyl; N-halogenothioalkyl-based compounds such as captan, captafol, and folpet. Compounds; dicarboximide compounds such as procymidone, iprodione, and vinclozolin; flutolanil, mepronil, mepronilsc, furametopyramide, furumetpyrado, tifluzamide, thifluzamide, ffluzamide, thifluzamide, and ffluzamide. (penthiopyrad), Isofetamido (isofetamid), fluopyram (fluopyram), sedaxane (sedaxane), bixafen (bixafen), penflufen (penflufen), moxifloxacin Piroki Sad (fluxapyroxad), isopyrazam (isopyrazam), benzo Bindi full pill (benzovindiflupyr) such as Carboxyanilide compounds; morpholine compounds such as fenpropimorph and dimethomorph; organotin compounds such as triphenyltin hydroxide and fentin acetate; fludioxonil (Fludioxonil), fenpiclonil (fenpiclonil) and other cyanopyrroles Compounds: Other tricyclazole, pyroquilon, carpropamide, diclocymet, phenoxanil, fusaloxir, fluazinum, fluazinam, fluazinam, fluazinam, fluazinam, fluazinam, fluazinam, fluazinam. Fe Knox (pyrifenox), fenpropimorph Din (fenpropidin), pencycuron (pencycuron), ferimzone (ferimzone), cyazofamid (cyazofamid), amisulbrom (amisulbrom), iprovalicarb (iprovalicarb), benthiavalicarb-isopropyl (benthiavalicarb-isopropyl), iminoctadine Albesylate salt, cyflufenamid, kasugamycin, validamycin, isoprotioquinobylinprobiol (isoprothiolinic), streptomycin, streptomycin, streptomycin, streptomycin, streptomycin, streptomycin, streptomycin, streptomycin, streptomycin, streptomycin, streptomycin, streptomycin, streptomycin, streptomycin, streptomycin. fungicides such as probenazole, tiadinil, isothianil, tolprocarb, MIF-1002, acrinatrin, allethrin [(1R)-isomerb, bifenthrin], bifenthrin. bioallethrin), bioallethrin S- cyclopentenyl isomer (bioallethrin S-cyclopentenyl isomer), bioresmethrin (bioresmethrin), cycloprothrin [pi] n (cycloprothrin), cyfluthrin (cyfluthrin), beta - cyfluthrin (beta-cyfluthrin), cyhalothrin (cyhalothrin), gamma -Cyhalothrin, lambda-cyhalothrin, cypermethrin lin), alpha-cypermethrin, beta-cypermethrin, seta-cypermethrin, zeda-cypermethrin-[cytamethrin], cypermethrin. Trans-isomer] (cyphenothrin [(1R)-trans-somer]), deltamethrin (deltamethrin), empentrin [(EZ)-(1R)-isomer] (empthrin [(EZ)-(1R)-isomer]), es. Fenvalerate, ethofenprox, fenpropathrin, fenvalerate, flucythrinate, flumethrin, fen-altual, tau-fluvalinate. Prox (halfenprox), imiprothrin (imiprothrin), methotrin (methothrin), metofluthrin (permethrin), phenothrin [(1R)-trans-isomer] (phenothrin) [Prinothrin (raR) [(R)-(R-R-(R-R-(R-R-(R-R-(R-R-(R-R-(R-R-(R-R-R-(R-R-(R-R-(R-R-(R-R-(R-(R-R which which is that which can be a (R), which is (R), (R), (R) that is). prallethrin), resmethrin (resmethrin), RU15525 (kadethrin (kadethrin)), silafluofen (silafluofen), tefluthrin (tefluthrin), tetramethrin (tetramethrin), tetramethrin [(1R) - isomer] (tetramethrin [(1R) -isomer]), Tralomethrin, transfluthrin, ZXI8901, biopermethrin, furamethrin, profluthrin, profluthrin, or flubrothrinate (flufluthyrin), flubrocitrinate (flufluthyrin), or flubrocitrinate. Various isomers;
Acephate, azamethiphos, azinphos-methyl, azinphos-ethyl, cassaphosphosphine, chloroethoxyphosphine, chloroethoxyphosphine, chloroethoxyphosphine, chloroethoxyphosphine, chloroethoxyphosphine, chloroethoxyphosphine, chloromethoxyphosphine, chloromethoxyphosphine, chloroethoxyphosphine, chloroethoxyphosphine, chloroethoxyphosphine, chloroethoxyphosphine, and chloroethoxyphosphine. chlormephos), chlorpyrifos, chlorpyrifos-methyl, chromapyos, coumaphos, CYAP (cyanophos), demeton-S, methionyl (demethon-dione, methion). Diclofenthion, DDVP (dichlorvos), dicrotophos, dimethoate, dimethylvinphos, disulfoton (ethyl thioN-nitro-ethyl(o-ethylepoxy)), disulfoton (ethylthiomethon) (diethylometholine) (diethylomethion) (diethylometholine) (diethyl phosphine). Phenylphosphonothioate (O-ethyl O-4-nitrophenyl phosphonothioate), ethion, ethoprophos, famfur, Famphurthion, phenamiphosion, fenamiphosion, femamiphosion, femmiphosion, femmiphosion, femmiphosion, femmiphosion, femmiphosion, femimiphos, femmiphosion. )), fosthiazate (fosthiazate), heptenophos (heptenophos), isofenphos - methyl (isofenphos-methyl), Isokarubohosu (Isocarbophos) (isopropyl O- (methoxyamino thio = phosphoryl) salicylate), isoxathion (isoxathion), malathion (malathion), Mecarbam, methamidophos, DMTP (methidathion), mevinphos, monocrotophos, BRP (nared), omethoate (omethodemethyl), omethoate-methyl (oxymethoate), oxymethoate (oxymethoate), omethoate (oxymethoate-methyl), oxymethoate (oxymethoate), methoxide (oxymethionate), omethoate (oxymethoate), methoxide (oxymethionate). ton-methyl, parathion, parathion-methyl, PAP (phentoate), phorate, phosalone, phosphoximone (phosphamide). ), pirimiphos - methyl (pirimiphos-methyl), profenofos (profenofos), propetamphos (propetamphos), prothiofos (prothiofos), pyraclofos (pyraclofos), pyridaphenthion (pyridaphenthion), quinalphos (quinalphos), sulfotep (sulfotep), tebupirimfos (tebupirimfos) , Temephos, terbufos, thiobuton, thimethon, triazophos, DEP (trichlorfon), bamidothion (vamidothion), Bayer 22/190 (chlorthion), chlorthion (brothion). bromfenvinfos), bromophos, bromophos-ethyl, butathiophos, carbophenothion phosphine, chlorophosphine, chlorfoxul, chlorproximul, chlorproximul, chlorproximul, chlorproximul, chlorproxim, chlorproximul, chlorproximul, chlorproximul, chlorproxim, chlorproximul, chlorproxim, chlorproximul, chlorproxim, chlorproxim, chlorproximul, chlorproxim, chlorproxim, chlorproxim, chlorproxim, chlorproxim, chlorproxim, chlorproxim, chlorproxim, chlorproxim, chlorproximul, chlorproxim, chlorproxim, and chlorproxim. (Tetrachlorvinphos)), propaphos, mesulfenfos, dioxabenzophos (salithione), etoxifosfosefionfosion (or thiodefholfos), oxydeprofofon (oxyformephosophion), oxydeprofofon (oxyformephosophion), oxydeprofosfo onion (phosophionfos), oxydeprofosfo onion (phosophion), oxydeprofosophion (online). Organophosphorus compounds such as isazofos, imicyafos (AKD3088), isamidofos, thionazine, fosthietan; phosphocarb (phosphocarb), ara Oxime carbamate compounds such as nicarb, butocarboxim, butoxycarboxim, thiodicarb, thiophanox, etc.; aldicarb, aldicarb, aldicarb, aldicarb, aldicarb. benfuracarb), NAC (carbaryl), carbofuran, carbosulfan, ethiofencarb, BPMC (fenocarbu), formetacarb (furocarbate), formemethanate (furocarban), formetacarb (furocarban) (formocarbate). isoprocarb)), methiocarb, methomyl, oxamyl, oxamyl, pirimicarb, PHC (propoxylcarbyl), trimetacarbyl, xMC(3,5-MC). ), aldoxycarb, bufencarb, butacarb, carbanolate, MTMC (metolcarb), MPMC (xylylcarb), phenoxycarb, xylylcarb, fenocarb, xenoylcarb, fenocarb. Carbamate-based compounds such as (bendiocarb); acetamiprid, clothianidin, dinotefuran, imidacloprid, nitenpyloramid, nitenpyloram (nitenpyloram), nitenpyramid (thiacloprid), thiencloprid (thiacloprid), thiacloprid (thiacloprid), thiacloprid. Diacylhydrazine compounds such as chromafenozide, halofenozide, methoxyphenozide, tebufenozide, bistrifluron (bist) rifluron), chlorfluazuron, diflubenzuron, flucycloxuron, flufenoxuron, hexaflumuron, flufluron, lufenuron, lufenuron, lufenuron. benzoylurea compounds such as noviflumuron, teflubenzuron, and triflumuron; phenoxycarb, hydroprene, hydroprene, quinoprene, quinoprene, mesoprene, mesoprene, mesoprene, and mesoprene. Young hormone compounds; cyclodiene organochlorine compounds such as chlordane, endosulfan, endosulfan, lindane (gamma-HCH), and dienochlor; 2-dimethylaminopropane-1,3-dithiol compounds; amidine compounds such as amitraz; phenylpyrazole compounds such as ethiprole, fipronil, acetoprole; azocyclotin ), cyhexatin, fenbutatin oxide, and other organic tin compounds; fenazaquin, fenpyroximate, pyridabene, pyrimidifendipyrifene, pyrimidifendipyfenidifen, and pyrimidifenfenpyridifenfry. , METI-based compounds such as tolfenpyrad; benzylate-based compounds such as bromopropylate; allylpyrrole-based compounds such as chlorfenapyr; DNOC, vinapacryl-phenolic compounds such as vinapacrylphenol Anthranil-diamide compounds such as chloranitraniprole and cyantraniliprole; oxadiazine compounds such as indoxacarb; metaflupylospironic sp compounds such as metaflumizone spirorospiron sp. Tetronic acid-based compounds such as mesifene and spirotetramat; carbamoyltriazole-based compounds such as triazamate; tetrazine-based compounds such as diflovidazin;
Abamectin (abamectin), emamectin benzoate (emamectin benzoate), milbemectin (milbemectin), lepimectin (lepimectin), acequinocyl (acequinocyl), azadirachtin (azadirachtin), bensultap (bensultap), benzoxycarbonyl formate (Benzoximate), bifenazate (bifenazate) , Buprofezin, CGA-50439, quinomethionate, clofentezine, cryolite, cyromazine, dazomet, daziphen, DIP, DIP, DIP, DIP, DIP, DIP, DIP, DIP. D-D (1,3-Dichloropropene), dicofol, dicyclanil, dinobuton, dinocap, ENT 8184, etoxazolemid, furoxanamide. ), fluacrypyrim, flubendiamide, GY-81 (peroxocarbonate), hexithiazox, hydramethylnon(hydrylmethanyl), methyl iodide, methyl iodide, methyl iodide, methyl iodide, and methyl iodide. (Verbutin), metam, methoxychlor (methoxychlor), methyl isothiocyanate (pentachlororophenol), phosphine (phosphine), piperonyl butoxide (pipernoxy), piperonyl butoxide (piperonyl), piperonyl butoxide (piperonyl). (Propargite), pymetrozine, pyrethrins, pyridalyl, rotenone, S421 (bis(2,3,3,3-tetrachloropropyl)ether, sabadilla). , Spinosad (Spinosad), spinetoram (spinetoram), Surukofuron salt (Surukofuron - sodium (sulcofuron-sodium)), sulfluramid (sulfluramid), tetradifon (tetradifon), thiosultap (thiosultap), tribufos (Tribufos), aldrin (aldrin), Amijichioon (Amidithion ), backbone selected from the group (Amidothioate), Aminokarubu (Aminocarb), amiton (amiton), Aramaito (Aramite), Achidachion (Athidathion), Azotoeto (Azothoate), polysulfide barium (barium polysulphide), Bayer 22408, Bayer 32394, benclothiaz (benclothiaz ), 5-(1,3-benzodioxol-5-yl)-3-hexylcyclohex-2-enone, 1,1-bis(4-chlorophenyl)-2-ethoxyethanol, butonate, Butopyronoxyl, 2-(2-butoxyethoxy)ethyl thiocyanate, camphechlor, chlorbenside, chlordecorone, chlordimeform, chlordimeform, chlordimeform, chlordimeform, chlordimeform, chlordimeform Isoprothiolane, fluazuron, methaaldehyde, phenisobromolate, fluazinam, fluazinol, bialaphos, benomyl, benomyl, benomyl, benomyl, benomyl, benomyl, benomyl, benomyl. Cyflumethofen, amidoflumet, IKA-2005, cyenopyrafen (NC512), sulfoxaflor (pyrfluprole 308), pyrafluprolo (6), pyrafluprole (6), pyrafluprole (6) yril), flupyrazofos, diofenolan, chlorobenzilate, flufenzine, benzomate(benzolate), flufeneric, flufenerim, flufenerim, flufenerim, Trifrolim, triproro. (Oxibendazole), fenbendazole, metam-sodium, 1,3-dichloropropene, flupyradifinoquinoplyphroquino, afidopyrrofuride, afidopyrrofuride, afidopyrrofuride, afidopyrofuride, afidopyrofurine, afidopyrofuride, afidopyrofuride, afidopyrofuride, afidopyrofuride, afidopyrofuride, afidopyrofuride. (Pyflubumide), fluensulfone), insecticides such as IKI-3106, acaricides or nematicides.

Examples of the phytotoxicity reducing agent to be simultaneously treated include, but are not limited to, benoxacor, furilazole, dichlormid, dicyclonon, DKA-24 (N1, N2-). Diallyl-N2-dichloroacetylglycinamide), AD-67 (4-dichloroacetyl-1-oxa-4-azaspiro[4.5]decane), PPG-1292 (2,2-dichloro-N-(1,3) -Dioxan-2-ylmethyl)-N-(2-propenyl)acetamide), R-29148 (3-dichloroacetyl-2,2,5-trimethyl-1,3-oxazolidine), cloquintocet-mexyl (cloquintcet-). mexyl), naphthalic anhydride (1,8-Naphtharic Anhydride), mefenpyr-diethyl, mefenpyr, mefenpyr-ethyl, fenchlorazole-ethyl-fenchlorazyl. , Fenchlorim, MG-191 (2-dichloromethyl-2-methyl-1,3-dioxane), ciometrinil, flurazole, fluxofenim, isoxadifen, isoxadifen-ethyl. isoxadifen-ethyl), daimuron, oxabetrinil, cyprosulfamide lower alkyl-substituted benzoic acid, cumyluron, TI-35 (1-dichloroacetylazepane) and the like. One kind or a combination of two or more kinds can be used.

Examples of the plant growth agent to be treated at the same time include maleic acid hydrazide or a salt thereof, abscisic acid, calcium peroxide, inabenfide, paclobutrazol, uniconazole, triapentenol, Psychocel and the like.
As described above, the seed preparation, which is subjected to the drying step and obtained by stopping the oxidation reaction by evaporating the water on the seed surface, is coated with iron according to the method for storing crop seeds used as a raw material, It can be saved in the usual way. For example, it can be spread in a seedling box so as to be flat, and can be stored using a nursery shelf, a container for transporting seedlings, etc. so as not to keep heat. Of course, the seed preparation can be stored in a degassed airtight container, airtight packaging, or, for example, a nitrogen-tight airtight sealed container so as not to be affected by air oxidation.

Next, a weed control method using a seed preparation coated with iron, which is the third invention of the present application, will be described.
The iron-coated seed preparation treated with the herbicidal composition of the present invention can be sown by a general cultivation method depending on the type of crop, like untreated seed. Since the herbicidal composition has been treated, it is usually unnecessary to spray other herbicides, but the herbicidal composition can be used in combination with other herbicides after confirming the growth state of the crop. The seed formulation can be sown on the land in a flooded state even on the soil surface. In particular, paddy rice seeds may be sown on the surface of a paddy field, in a submerged state, or in a falling state and then submerged.

Hereinafter, formulation examples of the herbicidal composition used in the present invention and test examples of weed control are shown and specifically described, but the present invention is not limited thereto. In addition, in the following formulation examples, "%" means% by mass.

Formulation example 1
Raw pyrazolate (purity 93.7%) (64.0 parts by mass), Newcol ^TM 291PG (manufactured by Nippon Emulsifier Co., Ltd., 1.0 part by mass), KP-1436 (dispersant for agricultural chemicals; manufactured by Kao Co., Ltd., 1.0 part by mass) and tap water (34.0 parts by mass) are mixed and wet-milled with an attritor 1S type (manufactured by Mitsui Mining & Smelting Co., Ltd.) to obtain a pyrazolate slurry (agrochemical active ingredient amount 60.0%). It was

Formulation example 2
Compound (I) (40.0 parts by mass), Newcol ^TM 291PG (Nippon Emulsifier Co., Ltd., 1.0 parts by mass), KP-1436 (Kao Co., Ltd., 1.0 parts by mass) and tap water (58). 0.0 parts by mass) was mixed and wet-milled with an Attritor 1S type (manufactured by Mitsui Mining & Smelting Co., Ltd.) to obtain a compound (I) slurry (agrochemical active ingredient content 40.0%).

Example 1
100 g of dried paddy rice seeds (variety: Koshihikari) were soaked in water at room temperature for 12 hours, and then sufficiently drained to obtain wet paddy rice seeds. After all the wet seeds were put into a pan mixer (DPZ-01 type manufactured by ASONE), 8.0 g of the pyrazolate slurry of Formulation Example 1 was treated while rotating the bread at a speed at which the seeds flow. Next, add 77 g of a mixture of iron powder and calcined gypsum (mixing ratio 10:1) to a seed by putting it in a pan while adding about 8 g of tap water, and evenly mix the mixture of iron powder and calcined gypsum with the seed. After being coated, calcined gypsum (3.5 g) was further added and powder coating was performed. The obtained seeds were dried at room temperature for 7 days, and the oxidation reaction of the treated iron powder was stopped to obtain an iron-coated seed preparation coated with pyrazolate. Here, the dressing means that each of the above components is attached to the seed surface in the form of powder.

Example 2
100 g of dried paddy rice seeds (variety: Koshihikari) were soaked in water at room temperature for 12 hours, and then sufficiently drained to obtain wet paddy rice seeds. After all the wet seeds were put into a pan mixer (DPZ-01 type manufactured by ASONE), 8.0 g of the pyrazolate slurry of Preparation Example 1 and a mixture of iron powder and calcined gypsum (mixed while rotating the bread at a speed at which the seeds flow) The ratio of 10:1 was alternated with a 1/10 amount of 77 g and put in a pan while adding about 8 g of tap water to coat the seeds, and finally 3.5 g of calcined gypsum was further added and dressed. The obtained seeds were dried at room temperature for 5 days to stop the oxidation reaction of the treated iron powder to obtain a pyrazolate-coated iron-coated seed preparation.

Example 3
100 g of dried paddy rice seeds (variety: Koshihikari) were soaked in water at room temperature for 12 hours, and then sufficiently drained to obtain wet paddy rice seeds. After all the wet seeds were put into a bread mixer (DPONE-01 made by ASONE), a mixture of iron powder and calcined gypsum was added while dropping the tap water with a pipette of about 8 g while rotating the bread at a speed at which the seeds flow. 77 g of (mixing ratio 10:1) was put into a pan and the seeds were dressed. After the seeds were uniformly coated with the mixture of iron powder and calcined gypsum, 3.5 g of calcined gypsum was further added. The step of replenishing the obtained seeds with water and drying the seeds at room temperature was repeated for about 7 days. The obtained iron-coated seeds did not stop oxidation yet and generated heat at room temperature and a relative humidity of 50%. The total amount of this seed was charged in a plastic bag, 8 g of the pyrazolate slurry of Preparation Example 1 was added, and the mixture was mixed with a piston to obtain an iron-coated seed preparation coated with pyrazolate.

Example 4
An iron-coated seed preparation coated with compound (I) was prepared in the same manner as in Example 1 except that 1.92 g of the compound (I) slurry of Preparation Example 2 was treated instead of the pyrazolate slurry of Preparation Example 1 of Example 1. Got

Comparative Example 1
100 g of dried paddy rice seeds (variety: Koshihikari) was soaked in water at room temperature for 12 hours, and then sufficiently drained to obtain wet paddy rice seeds. After all the wet seeds were put into a pan mixer (DPZ-01 type manufactured by ASONE), 8 g of tap water was dropped with a pipette while rotating the pan at a speed at which the seeds flow, and a mixture of iron powder and calcined gypsum (mixing) The ratio 10:1) was put in a 77 g pan and the seeds were dressed. After the seeds were uniformly coated with the mixture of iron powder and calcined gypsum, 3.5 g of calcined gypsum was further added. The obtained seeds were dried at room temperature for about 3 days without hydration for promoting oxidation. The obtained iron-coated seed did not generate heat at room temperature and 50% relative humidity, and the oxidation was stopped. The total amount of this seed was charged into a plastic bag, 8 g of the pyrazolate slurry of Preparation Example 1 was added, and the mixture was mixed with a piston to obtain an iron-coated seed preparation coated with pyrazolate.

Comparative example 2
Iron-coated seed preparation coated with compound (I) in the same manner as in Comparative Example 1 except that 1.92 g of the compound (I) slurry of Preparation Example 2 was treated instead of the pyrazolate slurry of Preparation Example 1 of Comparative Example 1. Got

Test Example 1 Pyrazolate dissolution test Water was added to a container having a surface area of 900 cm ² to a water depth of 4 cm, and then the iron-coated seed preparations of Examples 1 to 3 and Comparative Example 1 were treated at 5 sites at 4 sites. After a lapse of a predetermined time, the paddy water at a position 1 cm below the surface of the water was collected and the concentration of the herbicidal active ingredient in the water (DTP[4-(2,4-dichlorobenzoyl)-1,3-dimethyl-5, which is the active body of pyrazolate) was collected. -Hydroxypyrazole] amount (ppm) was measured by liquid chromatography. The results are shown in Table 1.

The iron-coated seed preparations of Examples 1 to 3 of the present invention were found to have higher DTP elution than the iron-coated seed preparation of Comparative Example 1.

Test Example 2 Dissolution test of compound (I) A pad of 100 cm ² was filled with paddy soil, water was added to a water depth of 4 cm, and then 5 iron-coated seed formulations of Example 4 and Comparative Example 2 were placed at 4 places each. Processed. After a lapse of a predetermined time, paddy water at a position 1 cm below the surface of the water was collected, and the concentration (ppm) of the herbicidal active ingredient in the water was measured by liquid chromatography. The results are shown in Table 2.

Compared with the iron-coated seed preparation of Comparative Example 2, the iron-coated seed preparation of Example 4 of the present invention was found to have a higher elution of Compound (I) particularly in the early stage after the treatment.

Test Example 3 Medication /damage test A pot of 800 cm ² was filled with paddy soil, and after scraping, seeds of firefly, konjac and azena were sown and mixed in the surface layer of the soil. The iron-coated seed preparations of Examples 1 to 4 and the iron-coated seed preparations of Comparative Examples 1 to 2 were sown at 4 sites, 5 grains each on the soil surface in a submerged state with a water depth of 1 cm. 20 days after sowing, the growth inhibitory effect was determined according to the following criteria. The results are shown in Table 3.
Criteria 0: Growth inhibition rate 0-9%
1: Growth inhibition rate 10-18%
2: Growth inhibition rate 19-27%
3: Growth inhibition rate 28-36%
4: Growth inhibition rate 37-45%
5: Growth inhibition rate 46-54%
6: Growth inhibition rate 55-63%
7: Growth inhibition rate 64-72%
8: Growth inhibition rate 73-81%
9: Growth inhibition rate 82-90%
10: Growth inhibition rate 91-100%

Test Example 4 Medicinal Effect/Pharmacy Test In a paddy field, after scraping, a resin frame of 50 cm×50 cm was installed, seeds of firefly, konjac and azena were sown and mixed into the surface layer of the soil. The iron-coated seed preparations of Examples 1 to 4 and the iron-coated seed preparations of Comparative Examples 1 to 2 were sown at 12 places, 5 grains on the soil surface in a submerged state with a water depth of 3 cm. On the other hand, iron-coated seeds that had not been treated with a drug were sown in the same manner, and the drug efficacy was compared with the group treated with a standard amount of Sunbird ^(R) granules (pyrazolate 10%). 20 days after seeding, the growth inhibitory effect was determined according to the above criteria. The results are shown in Table 4.

As is clear from Test Examples 3 and 4, weed control was achieved by sowing the iron-coated seed preparation of the present invention on the soil surface of paddy fields. In addition, the degree of growth inhibition of paddy rice was significantly lower than that of the various weeds tested, indicating high safety for paddy rice.

The method for producing an iron-coated seed formulation of the present invention and the weed control method using the produced iron-coated seed formulation can be used in paddy rice cultivation, achieve labor saving in herbicide spraying, and control important weeds. Moreover, it is an excellent invention because it does not cause phytotoxicity to paddy rice.

Claims (16)

1) a step of treating seeds with iron powder,
2) a step of treating the seed with the herbicidal composition and 3) a step of stopping the oxidation reaction of the treated iron powder,
A method for producing an iron-coated seed preparation, which comprises performing steps 1) and 2) before step 3). The production method according to claim 1, wherein 2) the step of treating the seed with the herbicidal composition is carried out, and then 1) the step of treating the seed with iron powder is carried out. The method according to claim 1, wherein 1) after the step of treating the seed with iron powder is performed, and before the oxidation reaction of the iron powder is stopped, 2) the step of treating the seed with the herbicidal composition is performed. Manufacturing method. The production method according to claim 1, wherein 1) the step of treating the seeds with iron powder and 2) the step of treating the seeds with the herbicidal composition are carried out simultaneously. The herbicidal composition contains at least one herbicidal compound selected from the group consisting of (A1) a whitening type herbicidal compound or a salt thereof and (A2) an acetolactate synthase inhibitor type herbicidal compound or a salt thereof as an active ingredient. The manufacturing method according to any one of claims 1 to 4, further comprising: (A1) The whitening herbicidal compound is a pyrazole herbicidal compound or a salt thereof, a triketone herbicidal compound or a salt thereof, and 6-chloro-3-(2-cyclopropyl-6-methylphenoxy)pyridazin-4-yl. The production method according to claim 5, which is at least one selected from the group consisting of morpholine-4-carboxylate and salts thereof. The (A2) acetolactate synthase-inhibiting herbicidal compound is at least one selected from the group consisting of a sulfonylurea herbicidal compound or a salt thereof and a pyrimidinylsalicylic acid herbicidal compound or a salt thereof. Manufacturing method. (A1) The whitening herbicidal compound is at least 1 selected from the group consisting of pyrazolate, and 6-chloro-3-(2-cyclopropyl-6-methylphenoxy)pyridazin-4-ylmorpholine-4-carboxylate. The production method according to claim 5, which is a seed. The production method according to claim 5, 6 or 8, wherein the (A1) whitening herbicidal compound is pyrazolate. The production method according to claim 5 or 7, wherein (A2) the acetolactate synthase-inhibiting herbicidal compound is a sulfonylurea herbicidal compound. In the step of treating the seed with the herbicidal composition, in addition to treating the seed with the herbicidal composition, the seed is at least selected from the group consisting of an insecticidal composition, a bactericidal composition and a plant growth agent. The manufacturing method according to any one of claims 1 to 10, wherein one kind is processed. The production method according to any one of claims 1 to 11, wherein the seed is a paddy rice seed. An iron-coated seed preparation obtained by the production method according to any one of claims 1 to 12. The iron-coated seed preparation according to claim 13, wherein the seed is paddy rice seed. A method for controlling weeds, which comprises sowing the iron-coated seed preparation according to claim 13 on a soil surface. A method for controlling weeds, comprising sowing the iron-coated seed preparation according to claim 14 on the surface of a paddy field soil.