JPS5939806A - Fungicidal composition for agricultural and horticultural use - Google Patents

Abstract

PURPOSE:To provide a fungicidal composition for agricultural and horticultural use, resistant to the deterioration of the composition and physical properties, and having high stability, by using benomyl as a fungicidal component, and adding white carbon prepared by dry process thereto. CONSTITUTION:Benomyl which is an agricultural and horticultural fungicide of formula [1-(n-butylcarbamoyl)benzimidazol-2-ylcarbamic acid methyl ester] is used as the fungicidal component, and is added with an age resistor consisting of white carbon prepared by dry process, and if necessary added with one or more metallic oxides selected from CaO, BaO, Al2O3, SiO2, B2O3 and ZnO (to stabilize benomyl), and the components are mixed together or pulverized to obtain the objective composition. The white carbon prepared by dry process is fine particle is silicic acid prepared by the thermal decomposition of silicon halide, silicic acid-containing material or an organic silicon compound.

Description

Detailed Description of the Invention This invention provides a highly stable agricultural and horticultural product containing methyl 1-(n-butylcarbamoyl)benzimidazol-2-ylcarbamate (hereinafter sometimes referred to as benomyl) as a bactericidal active ingredient. The present invention relates to a disinfectant composition for use in disinfectants.

Benomyl is known to have excellent bactericidal activity (Japanese Patent Publication No. 45-25720) and is used as a bactericide in the agricultural and horticultural fields, but it suffers from poor storage stability and its active ingredients deteriorate over time. (Tokuko Sho 47-3)
No. 1618), or the physical properties deteriorate over time. For example, in the case of irrigation agents, when the powder is poured into water and stirred, an increase in undispersed particles is observed, where the powder is not completely dispersed or suspended in the water and settles to the bottom of the water. These are the cause of trouble when dispersing the formulation, and it is desired to complete a formulation with good stability that prevents deterioration of quality over time.

In order to formulate benomyl, which tends to deteriorate in quality over time, many studies have been conducted in the past to prevent deterioration over time. However, its component stabilizing effect is insufficient, and its effect on preventing deterioration of physical properties is hardly recognized yet. In addition, the present inventors previously proposed a method of adding metal oxides for the purpose of stabilizing benomyl (Japanese Patent Laid-Open No. 57-99505
According to this method, it is almost possible to stabilize benomyl, but its effect on deterioration of physical properties is insufficient.

This invention was made in order to solve the problems of the conventional products as described above, and by containing dry process white carbon, it prevents deterioration of the components and physical properties and provides a stable agricultural and horticultural product. The purpose of the present invention is to provide a disinfectant composition for disinfection.

This invention is an agricultural and horticultural fungicidal composition characterized by containing methyl 1-(n-butylcarno(moyl)benzimidazol-2-ylcarnocuminate) and dry process white carbon.

0” C-NHCH2CH2CH2CH.

It is indicated by.

Further, dry process white carbon is white carbon (fine particle silicic acid) produced by a dry process, and includes the following types.

■Produced by thermal decomposition (pyrolysis method, gas phase method) of silicon halide.・As shown in equation (2), silicon halide vapor such as silicon tetrachloride, hydrogen, and oxygen (air) are mixed and burned at a constant ratio, and the flame temperature is 1,000 to 1,2
Generate fine particles of silicic acid and by-product hydrochloric acid at 00'C,
The two are separated by cooling, and the silicic acid and hydrochloric acid in the form of gas are removed by hot air.

~ S 1C14+H2+ 02 →S i02・nH2O
+ HCII - (2) ■Produced by thermal decomposition of silicic acid-containing materials.

...As shown in equation (6), silicic acid-containing materials with high silicic acid content such as silica stone, silica sand, and white clay are heated and reduced at approximately 2000°C using an electric arc in the presence of a carbon source such as total coke and anthracite. Then, the vaporized silicon monoxide is oxidized again by air and collected as fine particles of silicic acid.

5i02 +C+02 −+ 5i02−nH2O+
CO2-(3) ■Produced by thermal decomposition of organosilicon compounds. ...As shown in formula (4), organic silicic acid compounds such as various silicate esters and ethyl/licade are thermally decomposed and fine particulate silicic acid is collected.

R・SIO@AC+02→5i02・n■(20...
(4) Among the above dry process white carbons, especially ■,
(2) is preferred. Further, it is also possible to use other materials than those exemplified above. These may be used alone or in combination.

Dry process white carbon has characteristics such as extremely high purity silicon oxide and extremely low adsorbed moisture compared to wet process white carbon (white carbon produced by a wet process). Wet white carbon has traditionally been used as a diluent in the formulation of agricultural chemicals.
As shown in the test examples below, benomyl has no stabilizing effect and cannot be used as a stabilizer in the present invention.

The blending ratio of dry process white carbon to benomyl is 1 part by weight of benomyl to 00 parts by weight of dry process white carbon.
01 to 5 parts by weight, preferably 001 to 2 parts by weight.

The sterilizing composition for horticulture of the present invention contains calcium oxide (CaO), barium oxide (Bad), aluminum oxide (A120) in addition to benomyl and dry process white carbon.
3), silicon dioxide (Sin2), trioxide, diboron (
B2011) and zinc oxide (hereinafter referred to as metal oxides, etc.).
This greatly reduces the stabilizing effect of Benomyl. The usage ratio of these metal oxides, etc. is 0 to 1 part by weight of benomyl.
．． 0.01 to 5 parts by weight, preferably 0.02 to 6 parts by weight.

The agricultural and horticultural fungicidal composition of the present invention can be produced by mixing or pulverizing benomyl, dry process white carbon, and, if necessary, the metal oxides, etc., by a known method. Metal oxides etc. can be mixed into the preparation, but one or more of them can be enclosed in a breathable sachet and then added to the packaging of the agricultural and horticultural sterilizing composition of the present invention. You can also do that.

At the time of formulation, auxiliary agents commonly used in agricultural and horticultural chemicals such as diluents, surfactants, and fixing agents can be added as necessary to form a formulation such as an irrigation agent.

Examples of the diluent include fine mineral powders such as clay, talc, bentonite, and diatomaceous minerals. Examples of surfactants include nonionic surfactants such as polyoxyethylene alkyl allyl ether, polyoxy/ethylene alkyl ether, holoxyethylene/nrubitan fatty acid ester, polyoxyethylene styrylphenyl ether, alkylaryl sulfo/acid, and alkyl sulfate. Ionic surfactants such as salts, fatty acid salts, lignin sulfonates, alkylbenzene sulfonates, naphthalene sulfonates, and alkylamine salts can be mentioned. In addition, solid paraffin is used as a fixing agent.
Examples include vinyl acetate resin, natural oils and fats.

In addition to the above-mentioned compounds, in the present invention, other stabilizers made of natural or synthetic substances, fungicides, insecticides, herbicides, and plant growth promoters may be used as necessary within the range that does not inhibit the effects of the present invention. Regulators, synergists, attractants, repellents, fertilizers, fragrances,
It is also suitable for adding colorants, physical property improvers, etc.

Specific examples of fungicides and insecticides that can be blended include copper-based fungicides such as sulfuric acid hydroxide and 8-quinolite copper, zinc ethylene bis(dithiocarbamate), zinc ethylene bis(dithiocarbamate), ditheocarbamate) manganese, lead-mannep complex compound, zinc dimethyldithiocarbamate, 4,4'-
〇-Organosulfur fungicides such as dimethyl phenylenebis(31'-oarophanoate) and bis(dimethylthiocarbamoyl)disulfide, or N-(parafluorophenyl)-2,S-dichloromaleimide, 4,5, 6,7-titrachlorphthalide, N-
()lichloromethylthio)-4-cyclohexene-1,
2-dicarboximide and tetrachloroinphthalonitrile Hikodo organic J,! Organic phosphorus fungicides, such as S-penzyl-0,0-diisopropyl thiophosphate and 0-ethyl dithiophosphate, 5r-y phenyl, or 2-methyl-ro'-isopropyl Penzanilide fungicides such as Sibenzanilide and 3'-isopropoxy-2-trifluoromethylpenozanilide, or Plasticidin S1 polyoxin and Kasugamay/
or antibiotics such as 01O-dimethyl-o-4-nitrom-tolyl thiophosphate, o,o-diethylni-2-improbyl-4-methyl-6-pyrimidinyl thiophosphate, 5-dithiophosphate,
-2-Methoxy-5-okino 1.3.4-thiadiazolin-4-ylmethyl-0,O-dimethyl, 0,0-dimethyl-0-4-methylthio-771-)lyl thiophosphate, 0,0 thiophosphate -dimethyl-〇-5.5.6-dolichloro-2-pyridyl, 0,0-diethyl thiophosphate = (J-3,5,6-dolichloro-2-pyridyl, S-[α-(ethoxycarbonyl)benzyl dithiophosphate) ]
20,0-dimethyl,phosphoric acid 2-chloro-1-(2,
4-dichlorophenyl)vinyl dimethyl and 2-chloro-1-(2,4°5-trichlorophenyl) phosphate
Organophosphorus insecticides such as vinylnidimethyl, or organochlorine insecticides such as benzoic acid 6-chloro-N-ethoxy-2,6-simethoxybenzimidic anhydride and chlormethanesulfonamide, or methyl 1-naphthyl carbamate, m-tolyl methylcarbamate and methylcarno (mide acid 0+ set
- Examples include carbamate insecticides such as methylphenyl.

As explained above, since the agricultural and horticultural fungicidal composition of the present invention contains benomyl and dry process white carbon, it has extremely high storage stability, and decomposition of benomyl and deterioration of physical properties are small. Therefore, the agricultural and horticultural fungicidal IX11 composition of the present invention exhibits high bactericidal activity even after long-term storage, and also maintains the desired physicochemical properties during spraying. Furthermore, the agricultural and horticultural fungicidal composition of the present invention is not toxic to humans or livestock, and has little phytotoxicity to plants.

Next, the present invention will be specifically explained with reference to Examples, but the present invention is not limited to these Examples. Note that all parts on each side indicate parts by weight. Table 1 shows the white carbon used on each side and the white carbon available for one-time use. In Table 1, "dry method"
"Wet method" indicates wet method white carbon, and "Production method (■), (■)" indicates the production method (■, ■) of the white carbon.

Table 1 Example 1 (hydrating agent) After mixing 50 parts of benomyl, 5 parts of Aerosil-130, 3 parts of sodium dodecylbenzenesulfonate, 5 parts of calcium ligninsulfonate, and 267 parts of clay, the mixture was crushed and used for water use. as a drug.

Example 2 (Irrigation agent) 220 parts of benomyl, sodium tetrachloroisophthalonilate = 3 parts, calcium ligninsulfonate: 5 parts,
Clay: After mixing 17 parts, it is crushed and used as an irrigation agent.

Example 3 (Irrigation agent) Benomyl: 20 parts, bis(dimethylthiocarno(moyl)disulfide = 20 parts, furanzyl-251; 5 parts,
Diboron trioxide; 5 parts, sodium dodecylbenzenesulfonate: 2 parts, sodium naphthalenesulfonate: 3
Clay: After mixing 47 parts, it is crushed and used as an irrigation agent.

Example 4 (hydrating powder) Benomyl: 20 parts, #-()lichloromethylthio)-4
-Cyclohexene-1,2-dicarboxinmide: 50 parts, Turnip-o-sil M-5: 1 part, zinc oxide; After mixing the two parts, it is crushed to make a wettable powder.

Example 5 (Irrigation agent) 220 parts of benomyl, 60 parts of 2-methyl-6'-imbropoxybenzanilide, Aerosil R-972:
After mixing 4 parts of aluminum oxide, 1 part of polyoxyethylene styrylphenyl ether, 4 parts of sodium naphthalene sulfonate, and 28 parts of clay, the mixture is ground to obtain a wettable powder.

Example 6 (Irrigation agent) Benomyl = 50 parts, Aerosil-1, 0:5 parts, diboron trioxide: 3 parts, sodium dodecylbenzenesulfonate = 6 parts, calcium ligninsulfonate = 5 parts, Craze 64 parts After mixing, it is crushed and used as an irrigation agent.

Next, a test example regarding the effect of preventing decomposition and the effect of preventing physical deterioration of benomyl in the formulation of the above example will be shown.

Test Example 1 Preparations prepared according to Example 1 with different types of additives (white carbon) were stored in a thermostat at 40°C for 30 and 60 days, and then benomyl was analyzed and physical properties were measured. The effects of preventing decomposition and physical deterioration were investigated. For analysis of benomyl, benomyl was extracted from each preparation with chloroform, separated using high performance liquid chromatography, and quantified using an ultraviolet absorption detector. Physical properties were measured by counting the number of undispersed particles. The results are shown in Table 2.

The method for calculating the decomposition rate and the method for measuring the physical properties of benomyl are as follows.

■Decomposition rate of Benomyl■Method for measuring undispersed particles Place water use agent 50F in a beaker, add about 100ml of water to moisten it, stir lightly, and then transfer the suspension onto a 32-mesh sieve. After washing the remaining particles on the sieve with a small amount of water, calculate the number of particles that did not pass through the sieve, and define this as the undispersed particles.

Test Example 2 Table 3 shows the results of testing under the same conditions as Test Example 1 for formulations prepared by changing the type of metal oxide according to Example B.
Shown below.

Table 6 Test Example 6 Preparations prepared according to Example 1 with different additives (white carbon) were stored in a thermostat at 50°C for 50 and 60 days, and then benomyl analysis and physical properties were determined. i++ determination was performed to examine the effect of preventing decomposition and the effect of preventing physical deterioration. The method for calculating the decomposition rate of benomyl and the method for measuring the physical properties are the same as in Test Example 1. The results are shown in Table 4.

Table 4 Test Example 4 Formulations prepared according to Example B with different types of metal oxides were tested under the same conditions as Test Example 6, as shown in Table 5.

Table 5 From the above results, the formulation of the agricultural and horticultural fungicidal composition according to the present invention shows less decomposition of benomyl, prevents deterioration of physical properties, and has extremely excellent stability compared to the formulation cited as a comparison group. It can be seen that it has

Agent: Patent attorney Sei Yanagi Hara

Claims (1)

[Scope of Claims] (An agricultural and horticultural disinfectant composition characterized by containing methyl IN-(n-butylcarbamoyl)benzimidazol-2-ylcarbamate and dry process white carbon. (2) Dry process white The agricultural and horticultural fungicidal composition according to claim 1, wherein the carbon is silicon halide, a silicic acid-containing material, or fine particle silicic acid produced by thermal decomposition of an organosilicon compound. (6) Calcium oxide, barium oxide. The agricultural and horticultural fungicidal composition according to claim 1 or 2, further comprising one or more compounds selected from aluminum oxide, silicon dioxide, diboron trioxide, and lead oxide.