JPH05194105A - Agricultural chemical composition and its application - Google Patents

Abstract

PURPOSE:To provide an agricultural chemical composition capable of saving the labor for the spraying of the composition by throwing the composition on the surface of water, permitting to obtain the substantially same biological effect as when a granular agent is uniformly treated, and almost not generating chemical damages. CONSTITUTION:A granular agent containing one kind or more of biocidal ingredients and capable of being easily disintegrated, dispersed or dissolved in water is coated with a hydrophobic agent and a spreading agent so that the floating rate of the coated agent on the surface of the water is >=80% after 10sec and <=20% after 30min and further so that the spreading distance of the agent on the surface of the water is >=1m after 30sec. The prepared floating granular agent is wrapped with a sheet or container capable of being dispersed or dissolved in water to provide the agricultural chemical agent composition in the wrapped shape.

Description

Detailed Description of the Invention

[0001]

[Object of the Invention]

[0002]

FIELD OF THE INVENTION The present invention relates to an agricultural chemical composition and a method for treating the same. More specifically, a granule containing one or more kinds of biocidal components, which is easily disintegrated and dispersed in water, is coated with a hydrophobic agent and a spreader, and the water surface floating rate after 10 seconds is 80% or more, 30% or more. In the form of a sheet (hereinafter abbreviated as water-soluble paper) or a container that disperses or dissolves in water, floating granules that are 20% or less after a minute and have a water surface spreading distance after 30 seconds of 1 m or more, The present invention relates to an agricultural chemical composition containing or not containing a foaming agent, and a method for treating an agricultural chemical which throws the agricultural chemical composition into a paddy field.

[0003]

2. Description of the Related Art Conventionally, agricultural chemicals for paddy fields have been formulated into various dosage forms for convenience of use. That is, it is formulated into a powder, wettable powder, emulsion, granule, etc., and sprayed on the paddy field or rice paddy.

However, powders and wettable powders are produced by dusting.
There are health problems for users and producers. In particular, powders have a large amount of drift during spraying, which may adversely affect the surrounding residents and the environment. In addition, wettable powders have poor fluidity and often cause troubles in the manufacturing process. Emulsions pose toxicity problems and fire hazards due to organic solvents. Granules have few such drawbacks, but often do not have a sufficient controlling effect depending on the active ingredient.

For these reasons, recently, floorable (hereinafter abbreviated as FL) and dry floorable (hereinafter abbreviated as DF)
A new dosage form has been developed. The DF agent is also called a granule wettable powder, has fluidity and little dusting, and is easily dispersed in water to be an aqueous solution or suspension. Also, F
There are two types of L agent, one using water as a continuous phase and one using an organic solvent. These are roughly classified into a liquid dispersoid (emulsion type) and a solid dispersoid (suspension type), respectively.

[0006] These dosage forms called FL and DF can be said to be the dosage forms that have solved the above-mentioned drawbacks of wettable powders in that they are free of powder and have fluidity. For spraying, it is first necessary to dissolve or disperse it in water and then often a spraying device is required. In addition, it is necessary to enter the paddy field when spraying. Especially for small-scale part-time farmers, it is not only economically burdensome and unsafe to disperse and prepare containers and sprayers to dissolve or disperse, but it is also labor and time consuming. The burden is heavy. Especially for small-scale farms these days, which depend heavily on the elderly and women, such burdens are intolerable.

For this reason, recently, as a method that can be easily sprayed without requiring a special tool for spraying, a method has been developed in which the herbicide FL is put in a plastic bottle and sprinkled into the paddy field through a small hole formed in the cap. Was done. According to this method
It has the advantage that it can be sprayed easily without the need for special equipment for spraying, but it requires labor because it still needs to enter the paddy field, and depending on the spraying method and the wind direction, the spray of the chemical liquid may affect the worker. Because of the drawbacks such as insecurity, it is not always possible to completely eliminate the drawbacks of the conventional method. In addition, when treating used empty bottles, pesticide remains in the bottles, which may cause safety and environmental problems.

Further, recently, a herbicide for paddy fields, in which a surfactant and a foaming agent are added to the active ingredients (Japanese Patent Laid-Open No. 12830/1993).
1) and tablets or capsules for weed control in paddy fields containing the active ingredient, a surfactant, and a binder (JP-A-3-173)
The technology related to 802) has been disclosed. These technologies are
Although there is an advantage that can be easily treated paddy field herbicide, in the case of these solid preparations, the diffusion of the active ingredient in water is slow, and the phytotoxicity due to non-uniformity of the active ingredient depending on the field conditions, weather conditions, etc. Efficient unevenness is likely to occur. In addition, in order to produce tablets and capsules, new capital investment is required, and there is a problem of cost increase due to the use of new raw materials.

Further, as the water surface floating granule, conventionally,
(1) Those which are suspended by using a water-floating carrier (Japanese Patent Publications No. 48-15613 and No. 47-1240), (2) Those which use pumice or vermiculite having a specific water absorption capacity as a carrier (special JP-B-44-8600), (3) Granules using a volatile insecticidal compound (JP-B-49-11421), (4) Carbamate-based pesticide active ingredient, and an organic compound having a partition coefficient for water of 10 ² or more. A solid carrier (JP-A-2-174702), (5) a composition comprising a solid carrier, a bactericidal, herbicidal or plant growth regulating active ingredient, and an oil (JP-A-3-174702). No. 193705) is disclosed. However, these are no different from conventional granules in terms of spraying the granules, and cannot reduce the spraying labor. As well,
It is necessary that the granules float on the water surface for a certain time, but after that it is necessary to settle in the water,
The technology of the present invention was completely unimaginable in the technical field of such water-floating granules.

[0010]

Therefore, there has been a demand for a treatment method which requires no special equipment for spraying, can be treated without entering a paddy field, is safe, and is easy to treat containers. .. In view of such a current situation, the inventors have conducted extensive studies with the aim of developing a formulation and a treatment method satisfying the above conditions, and as a result, imparted appropriate hydrophilicity and a property of easily disintegrating and dispersing in water. The surface of the pesticide granules was treated with a hydrophobizing agent and a spreader to prepare floating granules that float on the water surface when they are put into a paddy field and spread by themselves on the water surface, and disperse this in water. It has also been found that the object can be achieved by throwing a sheet or container into a sheet that is dissolved and packaged into a paddy field. That is, with the dispersion or dissolution of the exterior, the particles spread sufficiently on the water surface, and as the water permeates the inside of the particles, the particles disintegrate and disperse in the water to settle, so that it is as if the granules were uniformly dispersed. A different active ingredient distribution was achieved. As a result, it was found that there is no concern about phytotoxicity, fluctuation of biological effects, lack of efficacy, etc., and the treatment method is simple, and there is no problem in terms of safety, treatment of containers, etc. Completed the invention. Moreover, since the active ingredient settles on the soil surface and forms a uniform treatment layer, essentially like ordinary granules, such preparations have insufficient residual effects due to runoff due to rainfall, river water, etc. Concerns about environmental pollution are extremely low.

As described above, the present invention reduces the spraying labor by throwing the sachets into the paddy field, and after spreading the granules to every corner of the paddy field by the force of the hydrophobic agent and the spreader. In the above, by allowing these granules to settle and disintegrate and disperse in a short time, a uniform active ingredient treatment layer can be formed as if the granules were uniformly dispersed. It is basically different from the technology of water-floating granules.

According to the method of the present invention, a desired preparation can be obtained by a very simple operation of coating the surface of general pesticide granules with a hydrophobic agent and a spreader, so new capital investment is required. Not. Therefore, the desired preparation can be obtained extremely economically.

[0013]

[Constitution of the invention]

[0014]

Means for Solving the Problems That is, the present invention provides a granule containing one or more kinds of biocidal components, having an appropriate hydrophilicity and prepared so as to easily disintegrate and disperse in water. Float which is coated with an agent and a spreading agent so that the water surface floating rate is 80% or more after 10 seconds and 20% or less after 30 minutes, and the water surface spreading distance after 30 seconds is 1 m or more. The present invention relates to a pesticide composition in a form in which a granule is wrapped in a sheet or a container that is dispersed or dissolved in water, and a method for treating a pesticide that throws the pesticide composition into a paddy field.

According to this method, it is possible to treat pesticides extremely easily because the treatment can be performed without entering a paddy field without using a spraying tool. Since it does not come into direct contact with the drug, it can be safely treated by children and the elderly, and it has the advantage that a part-time farmer can treat it even for a short time before going to work. Moreover, the container does not need a glass bottle or a plastic bottle, and a bag or box of paper or resin can be used, so that the container can be incinerated after use.

In the case of insecticides and fungicides, it is desirable that the agrochemical active ingredient that can be used in the present invention has the property of being absorbed and transferred to the rice plant, but even if it does not have the permeation transfer property, it will live in water or on the water surface. It is effective against worms or fungi that infect water or water. In any case, it is necessary for the compound to have low phytotoxicity. In the case of a herbicide, it is desirable to select a compound that is particularly harmless from the viewpoint of its original properties and the time of use. The active ingredient may be water-soluble or sparingly soluble in water, and may be solid or liquid. In general, a water-soluble compound is more rapidly dissolved and diffused in paddy water, and its effect is more quickly exhibited, but on the other hand, it tends to be inactivated by runoff due to rainfall, photolysis, or soil adsorption. On the other hand, sparingly soluble compounds are slow to dissolve and diffuse in paddy water,
Although the onset of the effect tends to be slow, it is often advantageous in terms of phytotoxicity, washout, and inactivation. Generally, a solid drug substance is more suitable for the present invention, but a liquid drug substance can also be applied if it is solidified by an appropriate method.

The active ingredient suitable for the present invention is an insecticide,
Isoxathion, propaphos, DEP, diazinon,
Ethyl thiomethone, formothion, dimethoate, monocrotophos, acephate, carbosulfan, thiocyclam, cartap, benfuracarb, fratiocarb, carbaryl, buprofezin, BPMC, PHC,
Imidacloprid, penetrant insecticide such as TI304, cycloprotrin, etofenprox, etc.,
Examples thereof include synthetic pyrethroids that are effective against harmful insects such as rice weevil and rice dwarf beetle that live in or near the surface of water. Examples of fungicides include blast agents such as propenazole, isoprothiolane, IBP, and tricyclazole, flutolanil, mepronil, MON24.
No. 0, S658 and other scouring agents, and teclophthalam. Herbicides include pyrazolate, benzophenap, pyrazoxifene, pyributycarb, bromobutide, mefenacet, bensulfuron-methyl,
Butachlor, Pretilachlor, Bench O'curve, C
NP, clomethoxynil, dimuron, pifenox, naproanilide, oxadiazone, bentazone, molinate, piperofos, dimepiperate, esprocarb, dithiopyr, imazosulfuron, benfrusate,
ACN, synmethrin, MCPB, quinclorac, pyrazosulfuron-ethyl, KPP314, N- [2- (3
-Methoxy) thienylmethyl] -N-chloroaceto-
2,6-Dimethylanilide (NSK850), 1- (2
Paddy field herbicides such as -chlorobenzyl) -3- (α, α-dimethylbenzyl) urea (JC940). Examples of plant growth regulators include inabenfide, paclobutrazol, uniconazole, triapentenol and the like.

It is necessary that these active ingredients spread sufficiently after being put on the surface of the paddy field, and after they are transferred from the packaging to the water, they are dissolved and diffused in the paddy field water as soon as possible to exert their effects.
Needless to say, the localization of the active ingredient over a long period of time causes inconvenience such as insufficient efficacy and drug damage.
Therefore, even if the active ingredient has a high solubility in water, if it is a solid, it is better to pulverize it to some extent. Fine pulverization is especially necessary when the active ingredient has a low solubility in water. In such a case, dry pulverization with a jet mill or wet pulverization with a sand mill or an attritor is performed. When the active ingredient is a liquid, it can be treated in the same manner as a solid drug substance by dissolving it in an appropriate solvent together with an emulsifier if necessary and absorbing it in an appropriate carrier to give a granular form.

These active ingredients spread to a wide area on the surface of the water when they are put into a paddy field, then wet and settle in water, easily disperse and dissolve in the original single particles, and diffuse into the entire paddy field as quickly as possible. There is a need to. Particularly in the case of a compound that is poorly soluble in water, if the dispersed active ingredient particles float on the water surface, it may be blown by the wind and the localization of the active ingredient may be accelerated. It is desirable to submerge it. For this reason, the active ingredient is blended with an appropriate carrier or an auxiliary agent if necessary, and is formulated into a granule which is easily disintegrated and dispersed by being wet with water. If necessary, other aids such as a dispersant, a binder, a grain growth inhibitor, a stabilizer and the like can be added to the granule.

Suitable dispersants include, for example, lignin sulfonate, (alkyl) naphthalene sulfonate and its condensate, phenol sulfonate and its condensate,
Styrene sulfonate and its condensates, salts of condensates of maleic acid and styrene sulfonic acid, salts of carboxylic acid condensates such as acrylic acid and maleic acid, alkylbenzene sulfonates, dialkyl sulfosuccinates, polyoxyethylene alkyls Ether sulphate salt, polyoxyethylene alkyl allyl ether sulphate salt,
Examples thereof include anionic surfactants such as polyoxyethylene alkyl ether phosphate ester salts and polyoxyethylene alkyl allyl ether phosphate ester salts. Many of these dispersants are also useful as wetting agents. The dispersant and the wetting agent are not limited to these, and any suitable nonionic, cationic or zwitterionic agent may be used.

Suitable carriers include bentonite, talc, clay, diatomaceous earth, amorphous silicon dioxide, calcium carbonate, magnesium carbonate, and other fine mineral powders commonly used as pesticide carriers, as well as glucose, sugar, Examples thereof include sugars such as lactose, water-soluble inorganic salts such as sodium sulfate, ammonium sulfate and potassium chloride, and urea.

Suitable binders include low molecular weight dextrin, polyvinyl alcohol, sodium salt of carboxymethyl cellulose and the like. Lignin sulfonate is particularly useful because it can be used as a dispersant and can be used as a bulking agent because it is relatively inexpensive.

These active ingredient pulverized products and auxiliary agents are mixed and then made into granules by using an appropriate granulator. Granules
The above mixture with stirring granulator, tumbling granulator, fluidized bed granulator,
It can be obtained by granulating with a spray dryer, an extrusion granulator, a dry granulator or the like. In particular, granules obtained by an extrusion granulator are suitable because they have a uniform grain size and can be easily coated with a hydrophobic agent and a spreader described later.

These granules may contain not only one kind but also two or more kinds of active ingredients. In this case, a mixture of a plurality of active ingredients may be granulated, or a separate granule may be prepared for each active ingredient and mixed in the same sachet.

In the present invention, the granules thrown into the paddy field as sachets must float as the packaging material disperses or dissolves, spread apart on the water surface, and then quickly settle. .. Therefore, the granules are coated with a hydrophobic agent and a spreading agent so that the water surface floating rate is 80% or more after 10 seconds and 20% or less after 30 minutes by the method described below, and 30
The water surface spreading distance after one second is adjusted to be 1 m or more. When the water surface floating rate after 10 seconds is lower than this, many particles settle immediately after the packaging material is dispersed or dissolved, which causes chemical damage and uneven efficacy. Even when the water surface spread distance is short, the granules do not spread from the bag-breaking point of the packaging and settle in a relatively narrow range, which causes drug damage and uneven efficacy. In addition, if the water surface floating rate after 30 minutes is too high, the granules are attracted to the leeward side or the tail of the water, which causes chemical damage and uneven efficacy, and causes runoff due to rainfall.

Hydrophobic agents for imparting a floating property to granules include higher fatty acids such as stearic acid and its calcium or magnesium salt and water-insoluble salts thereof, higher aliphatic alcohols such as stearyl alcohol, and hydrophobic silica. Can be used. In particular, hydrophobic silica is particularly preferable because it can be subjected to a hydrophobizing treatment with a small amount of compound and can be easily mixed and pulverized with a spreader. Hydrophobic silica is obtained by treating amorphous silicon dioxide synthesized by a dry method or a wet method with dimethylchlorosilane or the like to make it hydrophobic. Aerosil R series (Japan Aerosil Co., Ltd.), Reorosil MT -10 (Tokuyama Soda Co., Ltd.), Nipseal SS-10 (Nippon Silica Industry Co., Ltd.) and the like are available.

Further, as a spreading agent for spreading the granules floating on the water surface in the entire paddy field, polycarboxylic acid and polysulfonic acid type polymer surfactants, salts of higher fatty acids, sodium lauryl sulfate, perfluoroalkyl Suitable are surfactants such as carboxylates, polyoxyethylene alkylaryl ethers, polyoxyethylene alkyl ethers, polyoxyethylene alkyl esters, sorbitan alkyl esters, and wood rosins such as pine resin.

These hydrophobic agents and spreading agents are not limited to those described here as long as they can impart the above-mentioned physical properties to the granules.

In order to coat the granules with the hydrophobic agent and the spreader, each of them may be coated alone, but it is advantageous to coat the granules after mixing them. In this case, both are mixed in advance and, if necessary, crushed before use.

When the granules are coated with these, if they are completely coated with water, an organic solvent, a binder or the like, it may adversely affect the disintegration and dispersion of the granules in water. It is better to add the powdery hydrophobic agent and the spreading agent to the above and mix them lightly so that the surface of the particles is covered with the hydrophobic agent and the spreading agent.

The blending amounts of the hydrophobic agent and the spreader necessary to give the granules the above-mentioned physical properties are usually within the range of 0.5 to 10 parts per 100 parts of the granules. .. If it is less than this, the initial water surface floating rate and water surface spread distance will be insufficient. On the other hand, if the amount is larger than this, the granules will not sediment for a long time, which is not preferable. The ratio of the hydrophobic agent to the spreading agent is generally 5: 1 to 1: 5, preferably 2 :.
It is within the range of 1 to 1: 2.

A foaming agent may be further added to the composition of the present invention. This is a preferred aspect of the invention. The foaming agent facilitates the spreading of the granules on the water surface. The foaming agent is a carbonate such as sodium carbonate, sodium hydrogen carbonate, calcium carbonate, magnesium carbonate, potassium carbonate,
Mix solid water-soluble solid acids such as citric acid, oxalic acid, succinic acid, malic acid, maleic acid, boric acid, phthalic acid, phthalic anhydride, maleic anhydride, malonic anhydride, and itaconic anhydride as a solid. Can be obtained by These may be mixed with the floating granules in powder form as they are, but they are preferably granulated for the convenience of handling. In this case, both may be mixed and granulated, or the carbonate and the acid may be separately granulated and blended. When both are mixed and granulated, wet granulation reacts, so dry granulation or tableting is performed. The floating granules and the foaming agent thus obtained are divided into sheets or containers in which they are dispersed or dissolved in water and packaged.

As the material of the water-soluble paper, for example, cellulose or a cellulose derivative such as methylcellulose, hydroxypropylcellulose, carboxymethylcellulose and salts thereof, polyvinyl alcohol, pullulan, starch type, polyalkylene oxide type, etc. can be used, but they have been dissolved. When the water-soluble paper adheres in a gel state around the contents, the contents may not be dispersed properly, and the water-soluble paper needs to have strength enough to withstand throwing. In this sense
Those composed of cellulose and its derivatives are preferable because they are not easily broken and the fibers are loosely dispersed and dispersed in water. In addition, polyalkylene oxide-based water-soluble paper is also particularly useful because it has strength, has a short dissolution time in water, and does not adhere in a gel form. Such water-soluble paper is composed of pullulan as a pullulan film (manufactured by Hayashibara Co., Ltd.), disolbo (manufactured by Mishima Paper Co., Ltd.) as composed of sodium salts of cellulose and carboxymethyl cellulose, and sorbulon (Aicello Chemical Co., Ltd.) as composed of polyvinyl alcohol. Co., Ltd.), Hi-Selon (manufactured by Nigo Film Co., Ltd.), Tosulon (manufactured by Tokyo Cellophane Paper Co., Ltd.), Kuraray vinylon film (manufactured by Kuraray Co., Ltd.), polyalkylene oxide type polyoxyalkylene glycol and polyvalent Product names such as flexine (a film made of water-soluble resin Paogen, manufactured by Dai-ichi Kogyo Seiyaku Co., Ltd.) consisting of carboxylic acid and its lower alkyl ester, and Alcox (manufactured by Meisei Chemical Co., Ltd.) consisting of polyethylene oxide It can be obtained.

It is convenient if the water-soluble paper can be molded. The ends may be sealed with glue, but there is a problem in workability. In this respect,
Those that can be heat-sealed are convenient.

In this sense, water-soluble paper consisting only of cellulose and carboxymethyl cellulose has poor moldability and tends to be slightly inferior in strength, but a dissolvo WAP or polyvinyl alcohol film coated with a suitable thermoplastic resin may be used. The bonded dissolvebo WAL can be heat-sealed and has good strength, and thus is a suitable packaging material. Also, polyvinyl alcohol and polyalkylene oxide films can be heat-sealed,
Due to its water solubility, it tends to stick to each other or puncture under high humidity or when touched with wet hands. In such cases, these defects can be greatly improved by subjecting these films to a simple moisture-proof treatment. That is, when these films are embossed or a metal such as aluminum is vapor-deposited to form an extremely thin film, these defects can be substantially improved.

The material of the container may be water-soluble,
A thermoplastic water-soluble resin molded by injection molding or blow molding is used. Suitable water-soluble resins are the above-mentioned paogens, Alcox and the like. The shape of the container may be spherical, oval, columnar, cubic, rectangular parallelepiped, bale-shaped, etc., and any shape and size that can be easily thrown in, but since the container is generally thick, the dissolution rate in water becomes slow. Therefore, the lid portion may be sealed with the water-soluble paper as described above.

The weight of one package is about 30 g to 200 g, which is the easiest to throw. With this weight, children, women,
Even an elderly person can easily throw the ball into a target point within 15 m. If it is heavier than this, throwing it will be a pain and it will not be easy to handle a large area. Also, below this, the target location will not be reached due to the influence of the wind, and you will not be able to throw far if you do not put much effort in throwing.

The distance at which such a packet can be thrown is about 15
m. If thrown from the ridges on both sides, depending on the nature of the active ingredient, a paddy field with a width of about 50 m can be sufficiently covered.

The smaller the number of thrown per 10 ares is, the more labor is saved. However, if the number is extremely small such as 1 pack per several tens of ares, the effect may be insufficient or the drug may be damaged depending on the nature of the active ingredient. There is. But,
If it becomes too large, it will not make sense of labor saving,
It is good to keep it below about 30 packets per 10 ares. In this case, one packet is thrown in every few steps. A suitable number of thrown pieces is about 3 to 20 packets per 10 ares.

Such a package is packaged with a bag or box of paper or resin. However, since water-soluble paper breaks when exposed to water, it is desirable to use an exterior that has been appropriately waterproofed. When a foaming agent is blended, it may react with moisture to stop foaming, so it is desirable to use a sealed package such as by laminating aluminum foil. If the outer casing swells, a small hole may be formed only in the aluminum foil portion to prevent the outer casing from expanding and also to prevent moisture absorption.

[0041]

The embodiments of the present invention will be described in more detail with reference to the following examples, but the present invention is not limited thereto.

Examples 1 to 8 (herbicide) According to the formulations shown in Table 1, the herbicide for throwing paddy fields of the present invention was obtained. In each case, 1 sachet of each herbicide obtained contained 10.5 g of mefenacet, 0.51 g of bensulfuron methyl, and 4.5 g of dimuron. The formulation method was as follows.

17.5 parts of mefenacet drug substance (hereinafter, the drug substance means 100% purity conversion), 0.85 part of bensulfuron-methyl drug substance, 7.5 part of dimeron drug substance,
0.5 parts of Neogen powder (wetting dispersant containing sodium dodecylbenzenesulfonate as a main component, manufactured by Daiichi Kogyo Seiyaku Co., Ltd.), 5.5 parts of sodium tripolyphosphate, Amycor No. 1.5 parts of 1 (enzyme-modified dextrin, manufactured by Nitto Kagaku Co., Ltd.) and 9.95 parts of granular calcium carbonate K-3 (manufactured by Sankyo Seiko Co., Ltd.) were mixed, and then Jet Ohmizer 0101 type (Seishin Enterprise Co., Ltd.) Manufactured). To 43.3 parts of this crushed product, 25 parts of bentonite (Kunigel V-1, manufactured by Kunimine Industry Co., Ltd.) and 31.7 parts of Calfin 600 (heavy calcium carbonate, manufactured by Adachi Lime Industry Co., Ltd.) were mixed, and water was added. In addition, after kneading, granulation was carried out using an extrusion granulator EXK-1 type (manufactured by Fuji Paudal Co., Ltd., screen diameter 0.7 mm). After drying, sieving is performed using a sieve with opening diameters of 1.0 mm and 0.5 mm,
A granule that easily wets with water and easily disintegrates and disperses was obtained.

Separately, the hydrophobic agent Aerogel R-972 and the spreading agent Emar O (sodium lauryl sulfate, manufactured by Kao Co., Ltd.) were mixed at various ratios, and then Eck Sample Mill (manufactured by Fuji Paudal Co., Ltd., screen diameter 1. 0 mm) to obtain a mixed powder of a hydrophobic agent and a spreading agent.

Separately, calcium carbonate S (manufactured by Sankyo Seiko Co., Ltd.) and anhydrous citric acid were mixed at a ratio of 1: 1 and crushed by an Eck sample mill (screen diameter 1.0 mm) to obtain a roller compactor TF-MINI. Dry granulation was performed using a mold (manufactured by Freund Sangyo Co., Ltd., roll pressure 120 kg / cm ² ) and sized using a sieve with opening diameters of 3.35 mm and 0.5 mm to obtain a foaming agent.

Floating granules were obtained by mixing a mixed powder of granules, a hydrophobic agent and a spreading agent. A foaming agent was further added to this, and it was packaged in a water-soluble paper dissolver WAP, and the ends were heat-sealed.

Comparative Examples 1 to 8 The herbicides for throwing in paddy fields of Comparative Examples were obtained according to the formulations shown in Table 2. In each case, 1 sachet of each herbicide obtained contained 10.5 g of mefenacet, 0.51 g of bensulfuron methyl, and 4.5 g of dimuron. The formulation method was in accordance with the examples.

[0048]

[Table 1] (Unit is grams) ────────────────────────────── Example 1 2 3 4 5 6 7 8 ─ ───────────────────────────── Granules 60.0 60.0 60.0 60.0 60.0 60.0 60.0 60.0 Hydrophobic agent 0.3 0.8 1.5 2.0 3.0 6.0 3.0 1.5 Expand Spreading agent 0.3 0.8 1.5 2.0 3.0 6.0 1.5 3.0 Foaming agent 39.4 38.4 37.0 36.0 34.0 28.0 35.5 35.5 ───────────────────────────────

[0049]

[Table 2] (Unit is grams) ────────────────────────────── Comparative Example 1 2 3 4 5 6 7 8 ─ ───────────────────────────── Granules 60.0 60.0 60.0 60.0 60.0 60.0 60.0 60.0 Hydrophobic agent 0 0 3.0 0 0.2 10.0 6.0 0.5 Expanded Spreading agent 0 0 0 3.0 0.2 10.0 0.5 6.0 Blowing agent 0 40.0 37.0 37.0 39.6 20.0 33.5 34.5 ─────────────────────────────── Comparative Example 9 17.5 parts of mefenacet drug substance, 0.85 part of bensulfuron-methyl drug substance, 7.5 parts of daimulon drug substance, Dixsol W-27 (wet dispersion consisting of polyoxyethylene nonylphenyl ether and amorphous synthetic silica) Agent, manufactured by Dai-ichi Kogyo Seiyaku Co., Ltd.) 5.2 parts, granular calcium carbonate K-3
After mixing 3.95 parts of
It was crushed using a mold. To 35 parts of this crushed product, 65 parts of Sieglite for papermaking (manufactured by Sieglite Co., Ltd.) was added and mixed, and an Eck sample mill (screen diameter 1.0 m
m).

Separately, 42.4 parts of succinic anhydride, 5.2 parts of serogen PR (sodium carboxymethyl cellulose, manufactured by Daiichi Kogyo Seiyaku Co., Ltd.), sodium bicarbonate 31.
4 parts and 21.0 parts of sodium carbonate were mixed and pulverized by an Eck Sample Mill (screen diameter 1.0 mm) to obtain a foamed powder.

60 g of the crushed product and 40 g of foamed powder were mixed and the pressure was 150 to 160 kg / cm using a tableting machine.
² minutes 2 minutes compression molding, diameter 5cm, thickness 2.5cm
To obtain a tablet. One tablet contains the same amount of herbicide as in Example 1.

Comparative Example 10 17.5 parts of mefenacet drug substance, 0.85 part of bensulfuron-methyl drug substance, 7.5 parts of daimulon drug substance, 5.2 parts of Dixzol W-27, 3 of granular calcium carbonate K-3. 95 parts, Reax 85A (sodium lignin sulfonate, manufactured by West Vaco) and 15 parts of granulated sugar were mixed and then pulverized using a jet ohmizer 0101 type. To 60 parts of this crushed product, 20 parts of sodium bicarbonate and 20 parts of maleic acid were added and mixed, and crushed by an Eck Sample Mill (screen diameter 1.0 mm). Next, 100 g of this pulverized product was tabletted in the same manner as in Comparative Example 9 to prepare tablets containing the same amount of herbicide.

Test Example 1 Measurement of Water Surface Floating Rate and Water Surface Spreading Distance The water surface floating rate and the water surface spreading distance of the compositions of Examples 1 to 8 and Comparative Examples 1 to 8 were measured. In the present specification, the water surface floating rate and the water surface spreading distance refer to the numerical values obtained by the following test methods. The results are shown in Table 3.

<< Water Surface Floating Ratio >> 1 liter of purified water at 20 ° C. is put into each of two glass beakers having a capacity of 1 liter.
After waiting for the water surface to calm down, 1.0 g of each of the granules subjected to the hydrophobic spreading treatment is added from a height of 10 cm above the water surface. 10 seconds later and 30 minutes later, about 100 ml of floating granules and upper layer water are inhaled under reduced pressure. Analyze the content of active ingredients in the inhaled water to determine the proportion of suspended granules.

<< Water surface spreading distance >> Inner diameter 15 cm, length 2c
m vinyl chloride gutter is installed horizontally and 15 liters of tap water is added. Wait for the surface of the water to calm down, 5c from the end of the gutter
Approximately 1g of granules subjected to hydrophobic spreading treatment is dropped at the position of m, 3
After 0 seconds, the distance to the point where the tip of the granule has reached is measured.

[0056]

[Table 3] ───────────────────────────────── Example 1 2 3 4 5 6 7 8 ─── ────────────────────────────── Water surface floating rate (%) 10 seconds later 80 91 95 95 97 100 97 90 30 minutes later 2 5 5 5 8 12 19 0 Water surface extension distance (cm) 110 150 190 195 195 195 175 195 ──────────────────────────── ────── Comparative example 1 2 3 4 5 6 7 8 ────────────────────────────────── Water surface Floating rate (%) 10 seconds later 0 0 98 0 48 100 100 60 30 minutes later 0 0 75 0 7 53 72 3 Water surface extension distance (cm) 0 0 25 0 105 195 130 195 ───────── ───────────────────────── Test Example 2 Biological test Two-leaf stage rice planted in box form was transplanted to paddy fields that had been sublimated. In this field, a test area of 10 m in width and 10 m in length was provided by using a shore sheet. Examples 1 to 8 and Comparative Examples 1 to 7 days after transplantation
Ten samples were thrown into the center, one per ward. This situation is shown in FIG. From the circled point in Figure 1,
The surface water was collected 5 days after the treatment and the soil was collected 30 days after the treatment, and the amount of the active ingredient was analyzed. Also, after 30 days, the test plot was divided into 16 equal parts as shown in FIG. 1, and the growth of paddy rice and naturally occurring weeds (Tainubie, eel, broadleaf weed, firefly, etc.) was visually observed. Zark D granules (3
kg / 10a) was sprayed uniformly and compared with the examples and comparative examples. The water depth of the test area was 6 cm, and the water reduction depth was 0.5.
cm / day or less, the wind force during the treatment was 2 m / sec. Table 4
Fig. 2 shows the results of analysis of paddy water, and Table 5 shows the results of soil analysis.
5 to 5 show the test results of herbicidal effect (total observation of all grass species) and phytotoxicity.

In Tables 4 and 5, M is mefenacet and D is
Indicates dimuron and B indicates bensulfuron-methyl. 2 to 5, A indicates the maximum effect, B indicates slightly weeds, C indicates insufficient efficacy, the numbers in () indicate the number of growth-inhibiting strains, and the numbers in ○ indicate the number of missing plants.

[0058]

[Table 4] (Unit is ppb) ───────────────────────────────── Collection point Aa Bb Cc Dd ── ─────────────────────────────── MDBMDB MDBMDB ────────────────── ─────────────── Example 1 295 158 11 295 143 10 280 123 8 302 136 5 2 287 138 7 310 128 10 330 120 11 305 107 8 3 305 159 8 318 138 13 298 125 10 284 116 7 4 322 164 10 331 167 12 295 148 10 285 140 6 5 335 172 8 328 153 13 294 140 8 305 136 8 6 353 158 8 376 178 15 302 160 11 298 153 10 7 307 160 10 353 170 13 322 138 9 380 152 8 8 320 183 6 332 163 12 294 152 6 298 165 11 ────────────────────────────── ──── Comparative example 1 158 69 10 175 78 13 189 85 12 150 62 8 2 169 60 8 183 69 11 192 70 8 162 49 5 3 395 202 15 328 182 10 364 180 9 320 153 8 4 190 93 8 193 8 2 10 187 75 11 152 70 10 5 258 103 11 270 115 14 293 105 8 249 98 7 6 405 238 15 373 170 11 370 189 9 345 198 11 7 443 207 13 385 172 9 389 170 12 359 160 8 8 270 150 10 293 142 13 270 138 11 240 98 7 9 272 111 10 320 105 11 289 130 12 258 89 8 10 243 99 10 276 123 12 253 120 11 230 90 9 ─────────────── ─────────────────── Granules 301 117 10 305 125 16 294 111 6 320 130 11 ────────────────── ────────────────

[0059]

[Table 5] (Unit is ppm) ─────────────────────────────────── Collection point Aa Bb Cc Dd ─────────────────────────────────── MDBMDB MDBMDB ─────────────── ───────────────────── Example 1 0.74 0.68 <0.06 0.85 0.79 <0.06 0.73 0.62 <0.06 0.70 0.68 <0.06 2 0.68 0.64 <0.06 0.72 0.70 <0.06 0.62 0.62 <0.06 0.52 0.63 <0.06 3 0.65 0.68 <0.06 0.70 0.69 <0.06 0.67 0.49 <0.06 0.49 0.52 <0.06 4 0.59 0.53 <0.06 0.58 0.49 <0.06 0.48 0.48 <0.06 0.40 0.39 <0.06 5 0.57 0.62 <0.06 0.52 0.60 <0.06 0.62 0.49 <0.06 0.48 0.49 <0.06 6 0.63 0.62 <0.06 0.65 0.70 <0.06 0.61 0.65 <0.06 0.49 0.48 <0.06 7 0.68 0.63 <0.06 0.72 0.60 <0.06 0.60 0.53 <0.06 0.48 0.59 <0.06 8 0.55 0.58 <0.06 0.55 0.50 < 0.06 0.49 0.53 <0.06 0.70 0.62 <0.06 ─────────────────────── ──────────── Comparative example 1 0.30 0.25 <0.06 98.4 85.7 0.23 3.72 2.29 <0.06 0.25 0.22 <0.06 2 0.32 0.22 <0.06 82.0 75.0 0.19 23.4 20.5 0.06 0.22 0.19 <0.06 3 39.0 42.0 0.09 3.24 2.22 <0.06 0.22 0.25 <0.06 0.28 0.21 <0.06 4 0.25 0.30 <0.06 108.2 119.0 0.39 0.32 0.28 <0.06 0.20 0.15 <0.06 5 3.21 2.22 <0.06 79.3 68.2 0.25 0.24 0.19 <0.06 0.15 0.12 <0.06 6 45.2 38.5 0.10 3.20 2.25 < 0.06 0.21 0.18 <0.06 0.19 0.12 <0.06 7 53.8 35.2 0.10 1.38 0.93 <0.06 0.23 0.20 <0.06 0.20 0.25 <0.06 8 43.0 35.0 0.10 75.0 49.8 0.22 0.33 0.30 <0.06 0.20 0.18 <0.06 9 0.28 0.21 <0.06 38.0 40.5 0.09 52.0 45.0 0.15 0.25 0.33 <0.06 10 0.32 0.30 <0.06 42.3 35.0 0.12 32.9 28.7 0.08 0.22 0.20 <0.06 ────────────────────────────── ──── Granule 0.56 0.55 <0.06 0.58 0.57 <0.06 0.61 0.53 <0.06 0.83 0.75 <0.06 ──────────────────────────── ────── Example samples In both cases, there were few variations in the concentration in the paddy water and the concentration in the soil depending on the sampling point, and the herbicidal effect and phytotoxicity were not problems, but in the comparative example, the variation in the concentration in the soil depending on the sampling point was large, and near the treatment point. In addition, severe phytotoxicity including a missing strain was observed in the leeward direction. The weeding effect was also found to be insufficient at the mouth of the windward area.

Example 9 (herbicide) 12 parts of benzophenap drug substance, pyributicarb drug substance 6
Parts, 1- (2-chlorobenzyl) -3- (α, α-dimethylbenzyl) urea (JC940) 15 parts, neogen powder 1 part, vanilex N (sodium lignin sulfonate, Sanyo Kokusaku Pulp Co., Ltd.) ) After mixing 26 parts, 60 parts of water was added to form a slurry. This slurry was finely pulverized with a Dynomill KDL type (manufactured by Shinmaru Enterprises Co., Ltd., 1.0 mmφ glass beads). This crushed product is spray-dried with a spray dryer L-8 type (manufactured by Okawara Kakoki Co., Ltd.), and the dried product is further rehydrated with a Spartan Luzer RMO-2H type (manufactured by Fuji Paudal Co., Ltd.). Grained. 1.0 mm after drying
Approximately 0.297 mm in size and benzophenap 2
A granule containing 0%, 10% pyributicarb and 25% JC940 was obtained.

Separately, 50 parts of calcium stearate,
After mixing 50 parts of Demol EP (polycarboxylic acid type polymer surfactant, manufactured by Kao Co., Ltd.), it was pulverized using an Eck Sample Mill (screen opening diameter 1.0 mmφ), and a mixed powder of a hydrophobic agent and a spreading agent. Got

60 g of the above granules, a powder of a hydrophobic agent and a spreading agent 5
g was mixed to obtain a floating granule. The water surface floating rate of this floating granule was 92% after 10 seconds, 0% after 30 minutes, and the water surface spreading distance was 195 cm. This floating granule was subdivided into 65 g of High-Selon C-200 to obtain a stick-shaped throwing agent having a length of 15 cm and a width of 5 cm.

Example 10 (herbicide) 6 parts of pyributicarb drug substance, 0.5 part of bensulfuron-methyl drug substance, 4.5 parts of dimuron drug substance, 3 parts of granular calcium carbonate K-3, 1 part of neogen powder, vanillex. After mixing 35 parts of N, it was finely pulverized using a jet omizer 0101 type. This mixed powder was hydro-granulated using a spiral flow mini type (manufactured by Freund Sangyo Co., Ltd.) and then dried and sized to a size of 1.0 mm to 0.297 mm, and pyributicarb 12%, bensulfuron-methyl 1%, Daimlon 9 A granule containing 10% was obtained.

Separately, Leoroseal MT-10 50
Part, Unidyne DS-101 (perfluoroalkylcarboxylate, manufactured by Daikin Industries, Ltd.) 50 parts, and then Eck Sample Mill (screen opening diameter 1 mmφ)
Was pulverized to obtain a mixed powder of a hydrophobic agent and a spreading agent.

Floating granules were obtained by mixing 50 g of the above granules and 3 g of a mixed powder of a hydrophobic agent and a spreading agent. The water surface floating rate of the obtained floating granules was 88% after 10 seconds, 2% after 30 minutes, and the water surface spreading distance was 185 cm.

53 g of this floating granule was added to Paogen PP-15.
In a hemispherical container with a diameter of 7.5 cm and a thickness of 30
It was heat-sealed with a μm flexine.

Test Example 3 In a paddy field prepared 4 days after planting in the same manner as in Test Example 2, the sachets prepared in Examples 9 and 10 were used for each 1 ward.
I threw it into the center.

The sachet of Example 9 began to melt from the vertical portion of the sachet about 20 seconds after the paddy field was introduced, and after about 1 minute 30 seconds, the portion on the water surface of the bag was rolled up and the floating granules were exposed on the water surface. Spread out.
After about 10 minutes, it evenly floated on the water surface within a range of about 7 m in diameter from the point of casting, and after about 25 minutes, it sank into the water.

In the sachet of Example 10, the flexine portion was melted immediately after the addition, the floating granules spread from the point of throwing to the surface of the water having a diameter of about 8 m, and were submerged in water after about 25 minutes. The container also completely dissolved and disappeared after about 1 hour.

30 days after the chemical treatment, the herbicidal effect and the chemical damage were visually observed. The maximum effect was obtained in both plots, and no phytotoxicity was observed.

Example 11 (Insecticide) 90 parts of a raw material of dimethoate, 4 parts of neogen powder and 36 parts of granular calcium carbonate K were mixed and pulverized by using a jet omizer 0101 type. 65 parts of this crushed product,
28 parts of Calfin 600, 2 parts of AMICOL No1
Toxanone GR31A (Acrylic acid-based polysoap 40
% Aqueous solution; Sanyo Kasei Co., Ltd.) Add a small amount of water to 12.5 parts and knead with a kneader to make a basket type granulator R
Granulated with G-5M type (Kikusui Seisakusho Co., Ltd., screen opening diameter 0.7 mmφ), dried, and then opening diameter 1.0 mm
And a 0.5 mm sieve were used for sieving. This granule 5
1. 1.3 g of mixed powder of the hydrophobic agent and the spreader of Example 1
Floating granules were obtained by mixing 7 g. To 54 g of this floating granule, 26 g of the foaming agent of Example 1 was added, and flexine (thickness 3
The end portion was heat-sealed. 30 g of dimethoate is contained in this one sachet.

The water surface floating rate of this floating granule was 83% after 10 seconds, 0% after 30 minutes, and the water surface spreading distance was 180 cm.
Met.

Test Example 4 The pesticide package prepared in Example 11 was thrown into the paddy field at a rate of 15 per 10a. Packing is about 2 after paddy field
The bag was broken with foaming in minutes, and the floating granules spread out within a range of 5 to 8 m in diameter from the throwing point. After about 20 minutes,
Most floating granules settled in water and disintegrated and dispersed. Dimethoate granules treated simultaneously (containing 5% dimethoate:
6kg / 10a was sprayed uniformly) and the effect of suppressing the density on the leafhopper of the green leafhopper was compared by the scooping method, but no significant difference was observed in the effect. Moreover, no drug damage was observed.

Example 12 (Fungicide) 80 parts of teclophthalam drug substance, granular calcium carbonate K-3
7 parts, Neogen powder 3 parts, Wet Doll SSD
(Condensation product of sodium phenolsulfonate: BASF
(Manufactured by the company) 10 parts are mixed, and Jet Ohmizer 0101
It was crushed using a mold. 50 parts of this crushed product and 50 parts of Sieglite are mixed, water is sprayed with a flow coater FL mini type (manufactured by Freund Sangyo Co., Ltd.) to granulate, and after drying, a particle size of 1.0 to 0.297 mm is obtained. The particles were sized to obtain granules.

50 g of the granules were mixed with 3.5 g of the mixed powder of the hydrophobic agent and the spreader of Example 1 to obtain floating granules. 53.5 g of this floating granule was divided into Toslon ET-20 # 35, and the ends were heat-sealed. 20 g of teclophthalam is contained in one bag of this sachet.

The water surface floating ratio of this floating granule was 9 after 10 seconds.
5%, 12% after 30 minutes, and water surface spread distance was 195 cm.

TEST EXAMPLE 5 The packaging of the bactericide prepared in Example 12 was carried out at 10 per 10a.
Sewage was treated in the paddy field at the earliest stage at the rate of bags. The sachets in the paddy broke after about 3 minutes and the floating granules spread on the surface of the water.
After 5 minutes, the floating granules spread over a range of about 8 m in diameter. About 3
After 0 minutes, it sank in water and disintegrated and dispersed. Comparing the effect on shirahagare disease with silahagen powder S (containing 1% tecloftalum: 4 kg / 10a evenly sprayed) which was simultaneously treated, no significant difference was observed between the two. Also,
No drug damage was observed in either ward.

Example 13 (herbicide) 50 parts of pyrazolate drug substance, 0.4 parts of pyrazosulfuron-ethyl drug substance, Neocor SWCE (sodium salt of diethylhexyl sulfosuccinate, manufactured by Daiichi Kogyo Seiyaku Co., Ltd.) 1.0 Part, toxanone GR31A 1.0 part, sun extract P252 (sodium lignin sulfonate, Sanyo Kokusaku Pulp Co., Ltd.) 48.2 parts, water 100 parts were crushed for 1 hour with Attritor 1S type (Mitsui Miike Seisakusho Co., Ltd.) A slurry of pyrazolate and pyrazosulfuron-ethyl was obtained. This slurry is spray dryer L-
Spray drying with Form 8 gave a powder containing 50% pyrazolate and 0.4% pyrazosulfuron-ethyl. Flow powder FL mini type (manufactured by Freund Sangyo Co., Ltd.)
Water is sprayed and granulated with a particle size of 0.5-1.5 mm
The particles were sized to give granules containing 50% pyrazolate and 0.4% pyrazosulfuron-ethyl. The above granule 50
g and 2 g of the mixed powder of the hydrophobic agent and the spreading agent of Example 1 were mixed to obtain a floating granule. After mixing 23 g of the foaming agent of Example 1 with 52 g of the floating granules, the mixture was divided into Dissolvo WAL,
The edges were heat sealed. This one sachet contains 25 g of pyrazolate and 0.2 g of pyrazosulfuron-ethyl. The water surface floating rate of the floating granules was 93% after 10 seconds, 5% after 30 minutes, and the water surface spread distance was 190 cm.

Example 14 (herbicide) Aluminum was vapor-deposited on Hi-Selon S400 to a thickness of 50 Å to obtain a film composed of 25 μm of polyvinyl alcohol and 50 Å of aluminum. 75 g of the mixed product of the floating granules 52 g and the foaming agent 23 g of Example 13 was subdivided into a bag in which the aluminum surface of the obtained film was on the outside, and the ends were heat-sealed, and the same as Example 13. A sachet containing a herbicidal amount of the herbicide was obtained.

Test Example 6 The sachets of Examples 13 and 14 were thrown into the center of each plot in the paddy fields prepared 4 days after the planting in the same manner as in Test Example 2, one bag for each plot.

The sachet of Example 13 broke with foaming about 2 minutes and 30 seconds after being charged, and the granule spreads on the water surface about 15 minutes after spreading. It was About 3 granules
After 0 minutes, it settled in water while collapsing and dispersing.

The sachet of Example 14 was broken after 1 minute and 40 seconds, and the granules spread on the water surface with foaming. After about 15 minutes, it spread to the water surface with a diameter of about 8 m, and after about 25 minutes, it settled while collapsing and dispersing.

When the herbicidal effect and the phytotoxicity were observed on the 30th day after the chemical treatment, the maximum effect was obtained and no phytotoxicity was observed in both areas.

[0084]

[Effect] As described above, according to the present invention, pesticides can be applied without entering a paddy field without using a special spraying device. It provides novel compositions and processing techniques. It is simpler and labor-saving than conventional pesticide formulations and their treatment methods, and contributes greatly to the development of agriculture in terms of safety for workers and the environment and economic efficiency.

[Brief description of drawings]

FIG. 1 shows the setting of test plots, chemical treatment points, paddy water, soil sampling points, and the like in Test Example 2.

FIG. 2 shows the herbicidal effects of Examples 1, 2-5, 6 and 7 and the state of chemical damage to paddy rice.

FIG. 3 shows Example 8, Comparative Example 1, Comparative Example 2 and Comparative Example 3.
It shows the herbicidal effect of and the damage to rice.

FIG. 4 is a comparative example 4, a comparative example 5, a comparative example 6, and a comparative example 7.
It shows the herbicidal effect of and the damage to rice.

FIG. 5 shows the herbicidal effects of Comparative Examples 8, 9, and 10 and granule plots and the state of phytotoxicity against paddy rice.

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification number Internal reference number FI Technical display location A01N 25/16 7457-4H (72) Inventor Akiyoshi Kawagishi 1041 Yasu-cho, Yasu-gun, Shiga Prefecture Sankyo Stock Association In-house (72) Inventor Yasuhiro Tsujino 1041 Yasu-cho Yasu-cho, Yasu-gun, Shiga Sankyo Co., Ltd. (72) Inventor Toyonoku Honma 1041 Yasu-cho Yasu-cho, Yasu-gun, Shiga In-house (72) Inventor Masahiro Teramura Yasu-gun, Shiga Yasu Town Yasu 1041 Sankyo Stock Company In-house

Claims (9)

[Claims] 1. A granule containing one or more kinds of biocidal components, which is easily disintegrated and dispersed in water, is coated with a hydrophobic agent and a spreader, and the water surface floating rate is 80% after 10 seconds. Above, 30
Agricultural chemical composition in the form of a floating granule adjusted to have a water surface spreading distance of 20% or less after 1 minute and a water surface spreading distance of 1 m or more after 30 seconds in a sheet or container that is dispersed or dissolved in water. .. 2. The pesticide composition according to claim 1, wherein the granule is a granule prepared by an extrusion granulation method. 3. The pesticide composition according to claim 1, wherein the hydrophobic agent is hydrophobic silica. 4. The method according to claim 1, further comprising a foaming agent.
The agrochemical composition according to. 5. The pesticide composition according to claim 1, wherein the weight of one piece is 30 to 200 g. 6. The sheet or container is cellulose or a derivative thereof or surface-treated thereof.
The agricultural chemical composition according to any one of claims 1 to 5. 7. The pesticide composition according to claim 1, wherein the sheet or container is a polyalkylene oxide-based water-soluble resin or a surface-treated one thereof. 8. The sheet or container is made of polyvinyl alcohol or its surface-treated.
The agrochemical composition according to. 9. A method for treating a pesticide, which comprises throwing the pesticide composition according to claim 1 into a paddy field.