JPH01102009A - Agricultural and horticultural germicidal composition - Google Patents

Abstract

PURPOSE:To obtain an agricultural and horticultural germicidal composition capable of improving residual effect properties thereof for a long period, by using an agricultural and horticultural germicide tolclofos-methyl and powdery active carbon together. CONSTITUTION:An agricultural and horticultural germicidal composition obtained by adding powdery active carbon, preferably powder active carbon activated with a chemical to an agricultural and horticultural germicidal composition containing tolclofos-methyl [O,O-dimethyl O-2,6-dichloro-4-methylphenyl) phosphorothioate] capable of exhibiting excellent controlling effects on soil disease injury, especially plant disease injury caused by pathogenic germs of the genus Rhizoctonia or Corticium as an active ingredient at 3:1-1:2, preferably 1:1 weight ratio of the tolclofos-methyl:powdery active carbon and capable of holding excellent controlling effects for a long period by a facilitated recipe. Furthermore, the powdery active carbon may be added in spraying the tolclofos- methyl at the above-mentioned ratio.

Description

DETAILED DESCRIPTION OF THE INVENTION <Used on Wll> The present invention relates to an improved formulation of toclofos-methyl, an agricultural and horticultural fungicide, and a method for dispersing the same.

<Prior art> Pesticides are usually prepared by combining the active ingredients with an appropriate inert carrier in an appropriate proportion together with adjuvants if necessary, and then dissolving, dispersing, suspending, mixing, impregnating, granulating, and adsorbing the ingredients. Alternatively, it is prepared into an appropriate dosage form, such as a flowable agent, an emulsion, a wettable powder, a granule, or a powder. The preparations of tolclofos-methyl are described in Japanese Patent Publication No. 51-20571@ and Japanese Patent Publication No. 59-1!2404.

<Problem to be solved by the invention> Lutulclofos-methyl is a compound that exhibits an excellent control effect against soil diseases, particularly against plant diseases caused by pathogenic bacteria of the genus Rhizoctonia and Coccicium. However, the long-term residual effect of the liquid solution is not sufficient, and the desired control effect cannot be obtained, especially when sprayed on foliage.

<Means for Solving the Problems> In view of this situation, the present inventors conducted intensive research on formulations that have a stable pesticidal effect over a long period of time, and found that by adding powdered activated carbon, The present invention was completed based on the discovery that a long-term residual effect can be obtained.

That is, the present invention provides tolclofosmethyl [0,O-dimethyl 0-2,6-dichloro-4-methylphenyl]
phosphorothioate] as an active ingredient and powdered activated carbon (hereinafter referred to as
This will be referred to as the composition of the present invention. ) and its dispersion method.

Live sawdust charcoal, coconut shell charcoal, charcoal, etc. are good, and wet charcoal made by adding water to these is also good.

The particle size of the activated carbon is preferably 0.1 to 1-1, and in particular, in the case of wettable powders and granular wettable powders, the particle size is 0.1-5.
0μ is more desirable.

The amount of powdered activated carbon used in the present invention is such that the weight ratio of toiclophos-methyl to powdered activated carbon is in the range of 8:1 to 1:2, preferably 1:1, from the viewpoint of biological efficacy and economy.

In the present invention, powdered activated carbon may be added when preparing the spray liquid.Although the composition of the present invention may be used as it is without adding any other ingredients, it is usually mixed with an inert carrier to form granules or powders. ,
Formulated into wettable powders, flowable powders, granular wettable powders, etc. These preparations contain the effective (component) tolclofos-methyl in a weight ratio of 0.1 to 75, preferably 1 to 50.

The inert carriers used are usually vegetable powders such as residues after soybean extraction; clays represented by the kaolinite group, montmorillonite group, or attapulgite group; talc; mica; pylori; pumice; Yurite,
Chemistry of inorganic mineral powders such as gypsum, calcium carbonate, dolomite, diatomaceous earth, magnesium lime, apatite, zeolite, silicic anhydride, synthetic calcium silicate, white carbon, ammonium disulfate, ammonium phosphorus, ammonium nitrate, urea, base tubes, etc. Fertilizer, compost, etc.: Natural polysaccharides such as dintan gum and locust bean gum @: Semi-synthetic polysaccharides such as carboxymethyl cellulose Wi:
Synthetic polymers such as mini-polyacryluda salts: Fine mineral powders such as magnesium and Aldenko Umrelicate: Water, ethylene glycol, -lyethylene glycol, propylene glycol, propylene glycol, glycerin, and other solvents. It is used in combination with one or both of the following.

In addition, surfactants used for dispersion include alkyl sulfate esters such as sodium lauryl sulfate, aryl sulfonic acids such as alkylaryl sulfonates, sodium alkylnaphthalene sulfonates, and gluegeninsulfonates such as sodium lignin sulfonate. , ionic surfactants such as cobacyl ether sulfate ester salts,
Alkylamines such as laurylamine, stearyltrimethylammonium chloride and alkyldimethylbenzylammonium chloride, cationic surfactants such as polyoxyethylene alkylamines, polyoxyethylene glycol ethers such as polyoxyethylene alkylaryl ether, -lyo Examples include nonionic surfactants such as polyoxyethylene glycol esters such as triethylene chloride fatty acid, polyhydric alcohol esters such as polyoxyethylene sorbitan monolaurate, and amphoteric surfactants. Lubricants such as PAP (isopropyl acid phosphate), synergists, and the like can also be used as appropriate. Further, it may be prepared by mixing other fungicides, insecticides, herbicides, fertilizers, etc.

The compositions of the present invention are used to control plant diseases in rice fields, fields, orchards, lawns, etc., and these preparations can be applied directly or diluted with water and sprayed on foliage, or sprinkled on the soil. It is used in various forms, such as by scattering or applying it to the soil. It can also be used for seed treatment. Among these, foliage spraying is preferred. When spraying, the application amount is usually toy to 40011 toy per area, preferably 20 to 200 g, and when applying wettable powders, granular wettable powders, flowable powders, etc. with water, the application concentration is 0
．． O1% to 1%, preferably 0.02% to 0.5%, and granules, powders, etc. are applied as they are without any dilution.

<Example> Next, the present invention will be explained in further detail by giving formulation examples, comparative examples, and test examples, but the present invention is not limited to these. The following section indicates the Mi section.

Formulation Example 1 Tolclofos methyl 8 parts, white carbon 068 parts,
3 parts of P A P Q, 8 parts of CarboFine (registered trade name: powdered activated carbon of Narita Pharmaceutical Co., Ltd.), and 98.4 parts of kaolin clay were uniformly mixed in a mixer to obtain a powder.

Formulation Example 2 25 parts of tolclofos-methyl, 5 parts of white carbon, 6 parts of Hymar 2024 [F] (registered trademark of Matsumoto Yumashi: surfactant), 2 parts of sodium ligninsulfonate, ±88 parts of diatoms, and each of carbolafine ■, Refined White 10, Strong Shirasagi■ or Specially Made Shirasagi@ (both from Narita Pharmaceutical Co., Ltd.)
25 parts of powdered activated carbon) were added and mixed uniformly in a mixer to obtain each wettable powder.

Formulation Example 8 5 parts of tolclofos-methyl, 1 part of white carbon, 2 parts of sodium dodecylbenzenesulfonate, 85 parts of carbolafine', 80 parts of bentonite, and 57 parts of clay were added and mixed uniformly in a mixer. 28 parts of water is added to 1:100 parts of this mixture and kneaded, then granulated using a granulator, and then dried at 60° C. for 10 minutes to obtain granules.

Formulation Example 4 80 parts of 10% polyvinyl alcohol aqueous solution A suspension of tolclofos-methyl having an average particle size of 2.8 μm was obtained. 90 parts of this suspension was mixed with 90 parts of carbofin@lO to obtain a flowable agent.

・Formulation Example 5 Tolclofos methyl 86 parts, carbolafine 086 parts,
After adding 7 parts of white carbon and 28 parts of sodium ligninsulfonate and mixing them uniformly, the mixture was granulated by rolling while spraying water, and then dried at 60°C for 10 minutes to obtain a granular wettable powder. Comparative Example 1 Torclofos 8 parts of methyl, 0.8 parts of white carbon,
A powder was obtained by uniformly mixing 0.8 parts of P A P and 96.4 parts of kaolin clay in a mixer. Comparative Example 2 25 parts of tolclophos methyl, 6 parts of white carbon, Hymar 2024@5 parts, lignin sulfone 2 parts of sodium chloride and 68 parts of diatomaceous earth were uniformly mixed in a mixer to obtain a wettable powder.

Test Example 1 200 W of each of the powders obtained in Formulation Example 1 and Comparative Example 1 was uniformly spread in a Petri dish with a diameter of 115I. This petri dish was stored in a 40° C. thermostat, taken out over time, and the amount of residual tolclofos-methyl was analyzed by gas chromatography.

The results are shown in Table 1.

@1 Table Test Example 2 1/10000 a The powders obtained in Formulation Example 1 and Comparative Example 1 were sprayed on the foliage at a rate of 4 h/10 a to rice planted in Wagner pots. One week after spraying with Tsui, rice sheath blight fungus (Rhizoctonia solani, AG
The sclerotia of -1) were inoculated into the base of the rice plant. Two and eight weeks after inoculation of sclerotia in each pot, the extension length of the lesions was investigated, and the control value was calculated using the following formula. The results are shown in Table 2.

Table 2 Test Example 8 Cucumbers (cotyledon development seedlings) planted in plastic cups,
500pp of the hydrating powder obtained in Formulation Example 2 and Comparative Example 2
A diluted solution with a concentration of m was sprayed on the leaves and the leaves were air-dried. Next, on the day of the spraying and 7 days after the spraying, we tested Rhizoctonia blight.
solani AG-4),
After 8 days, the extension and length of the lesions were examined, and the control value was calculated in the same manner as in Test Example 2. The results are shown in Table 8.

Fa 8 Table <Effects of the Invention> The agricultural and horticultural utility Wi composition of the present invention is easily formulated and can maintain superior pesticidal efficacy over a long period of time compared to the conventional formulation of tolclofos-methyl.

Claims (6)

[Claims] (1) A sterilizing composition for agriculture and horticulture, which contains tolclofos-methyl as an active ingredient and powdered activated carbon. (2) The agricultural and horticultural fungicidal composition according to claim 1, which contains powdered activated carbon activated with a chemical. (3) The weight ratio of tolclofos-methyl and powdered activated carbon is 8:
The agricultural and horticultural fungicidal composition according to claim 1, which has a ratio of 1 to 1:2. (4) A spraying method characterized by adding powdered activated carbon when spraying tolclofos-methyl. (5) The spraying method according to claim 4, in which powdered activated carbon activated with a chemical is added. (6) The weight ratio of tolclofos-methyl and powdered activated carbon is 3:
5. The method of claim 4, wherein the ratio is in the range of 1 to 1:2.