JPS6289606A - Fungicide for agricultural and horticultural purposes - Google Patents

Abstract

PURPOSE:A fungicide for agricultural and horticultural purposes that contain, as an active ingredient, a specific proportion of a (thio)urea and another compound, thus developing synergic action against plant diseases, simultaneously controlling insect pests, but having reduced toxicity to warm-blood animals. CONSTITUTION:A urea or thiourea of the formula (Y is O, S), which has good fungicidal activity and shows good effect against rice plant sheath blight such as N-4-chlorobenzyl N-sec.-butyl N'-phenylurea and a compound selected from O-ethyl S,S-dophenyl phosphorodithiolate, O,O-dimethyl 4-methlthio-m- triphosphorothioate, and so on which has good effect against rice blast disease are used as active ingredients at weight ratio of 1/1 to 1/10. The compound of formula I is used 1kg/ha based on the active component. EFFECT:The fungicide causes no chemical injury to crops and labor can be saved.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is based on the general formula: [In the formula, Y represents an oxygen atom or a sulfur atom. ] The urea or thiourea compound represented by the active ingredient (
a) and 0-ethyl s, s as other active ingredients (b)
-diphenylphosphorodithiolate, 02O-dimethyl≠-methylthio-m-tolylphosphorothioate, 0,0-tumethyl2,2.2-)lichloro/-hydroxyethylphosphonate, S-[α-(ethoxycarbonyl) Benzyl〕0.0・
Dimethyl phosphorothiolothionate is an agricultural fungicide containing seven compounds selected from λ-ingropoxypheni/l/N-methylcarnomate, the active ingredient (, ) and the active ingredient ( The mixing weight ratio of b) is /
: / to / : 10, and the amount of the active ingredient (a) applied per unit area is about / per hectare.

In order to develop a new agricultural and horticultural fungicide, the present inventors have studied a mixed preparation that has the effect of cooperatively and synergistically increasing the effects of drugs by mixing drugs with different effects. I've been thinking about this over and over again.

The present inventors have now discovered that
Especially the rice sheath blight disease cylinder (P@1licularla aaaa
a urea or thiourea compound represented by the formula (a) that exhibits an excellent effect against Pyricularia oryzae (Pyricularia oryzae); and the insecticides Pygit, Digterex, and Hynozan, which exhibit an excellent effect against Pyricularia oryzae. No J? When mixed with 7 of the 5 types of zothion or suncide at a ratio of 0/:/ to/:10, and the application rate per unit area of active ingredient (a) is about / per hectare, the above-mentioned It has been discovered that the fungicidal effect of the urea or thiourea compound represented by formula (a) increases cooperatively and synergistically, and 90. When the agricultural and horticultural fungicide of the present invention is used for plant disease control,
Even if the concentration of the urea or thiourea compound represented by the formula (a) is within a range that does not exhibit an accurate control effect when used as a single agent, this mixture produces an extremely pronounced synergistic effect and The synergy works, and as a result,
It was confirmed that the bactericidal ability against plant disease-causing bacteria was increased and that the plant could be accurately controlled. In addition, since the effects of each single agent appear at the same time, it is possible to expand the bactericidal spectrum and simultaneously control harmful insects, which has been confirmed to be effective in terms of labor saving and economic efficiency in agriculture.

Specifically, the urea t7'h represented by the above formula (&) is a thiourea compound such as N-≠-chlorobenzyl N-5ee-butyl N'-phenylurea, N-Hiro-chlorobenzyl N-5ee-butyl N'-phenylthiourea.

The agricultural and horticultural fungicide of the present invention has low toxicity to mixed-breed animals and good affinity for higher plants, that is, it does not cause any phytotoxicity to cultivated plants at normal concentrations, so it can be used as an agricultural and horticultural agent. , can be used quite advantageously against plant diseases caused by pathogenic bacteria.

The agricultural and horticultural fungicide of the present invention can be used as it is by directly diluting it with water, or it can be used in various formulations by using pesticide auxiliaries and methods commonly used in the field of pesticide manufacturing. can. These moderate formulations are suitable for actual use. Do you want to use it?
Alternatively, it can be used after being diluted with water to a desired concentration.

The pesticide auxiliaries mentioned here include inert solvents and/or diluents (fillers or carriers) (
These are used to transport the active ingredient to the pathogen and/or the place where the pathogen grows. ).

Furthermore, mention may be made of various surfactants and/or organic raw materials, such as stabilizers, spreading agents (fixing agents), synergists, etc. (It is used to maintain and improve.)

Solvents include water: organic solvents: aliphatic and alicyclic hydrocarbons [e.g., n-hexane, industrial gasoline (petroleum ether, solvent naphtha, etc.), petroleum distillates () fluorine wax, kerosene, light oil, medium oil, heavy oil, etc.]], aromatic hydrocarbons [
For example, benzene, toluene, xylenes, aromatic naphtha, etc.], alcohols C examples, tb, methyl alcohol,
ethyl alcohol, propyl alcohol, ethylene glycol, etc.], ether a [e.g., ethyl ether, ethylene oxide, dioxane, etc.], alcohol ethers [e.g., ethylene glycol monomethyl ether, etc.], ketones [e.g., acetone, isophorone, etc.] etc〕
, esters [e.g., ethyl acetate, amyl acetate, etc.],
Examples include amide Ps (eg, dimethylformamide, dimethylacetamide, etc.) and sulfoxides (eg, dimethylsulfoxide, etc.).

As a diluent (filling agent or carrier), vegetable powders:
Mineral powders: two clay minerals (clays) [e.g., kaolinite group, montmorillonite group, butanolujiite group, etc.], talc, pyrophyllite,
Mica, calcite, vermiculite, dolomite, dolomite, apatite, slaked lime, magnesium lime, diatomaceous earth, inorganic salts [e.g., calcium carbonate, etc.], sulfur,
Examples include pumice di-synthetic mineral powders (for example, highly dispersed silicic acid, synthetic alumina, etc.) and di-synthetic resins (for example, phenol resins, urea resins, vinyl chloride resins, etc.).

Examples of surfactants include anionic surfactants: alkyl sulfate esters [e.g., sodium lauryl sulfate, etc.], arylsulfonic acids [e.g., alkylaryl sulfonate, sodium alkylnaphthalene sulfonate, etc.]: cation ( Cation] surfactant, alkyl amines [e.g. laurylamine, stearyltrimethylammonium chloride, alkyldimethylpennolammonium chloride, etc.], polyoxyethylene alkyl amines: nonionic surfactant, polyoxyethylene glycol esters [ For example, preoxyethylene alkylaryl ether, polyoxyethylene alkylphenyl ether, etc.], polyoxyethylene glycol esters [e.g., I-lyoxyethylene fatty acid ester, etc.], polyhydric alcohol esters [e.g., polyoxyethylene sorbitan monolau・Organic raw materials include stabilizers: spreading agents (fixing agents) [for example, agricultural river soap, casein lime, sodium alginate, polyvinyl alcohol (PVA), Ngress Sode, Coumaron or Indene Resin, Polyvinyl Alcohol, etc.]: (
For smoking agents) Combustion agents (e.g. nitrite, zinc powder, dicyandiamide, etc.): Oxygen supply agents (oxygen yield)
ding) (e.g., perchlorate, dichromate, etc.): Phytotoxicity reducer (e.g., zinc sulfate, ferrous chloride, copper nitrate, etc.): Potency extender (e.g., chlorinated terphenyls, etc.) Bidisperse Stabilizers (eg, casein, tragacanth, carboxymethylcellulose (CMC), polyvinyl alcohol (PVA), etc.): synergists, etc. can be mentioned.

The compound of the present invention can be manufactured into various formulations by methods generally practiced in the agricultural chemical manufacturing field.

Forms of preparations include solvents (e.g., emulsions, aquariums, tablets, aqueous solutions, suspensions, solutions, etc.), powders, granules, powders, smokes, fumes, pastes, etc. can be mentioned.

The agricultural and horticultural fungicide of the present invention contains 0.0% of the mixed active ingredient.
/~the law of nature! Weight factor, preferably 0. It can contain up to 70% by weight.

In actual use, the various formulations and preparations for dispersion described above (ready-to-use-prepara.
The active compound content in tion) is generally 0.000
1-20% by weight, preferably 0.0/j-0,O
A range of j j″ weight ratio is appropriate.

The content of these active ingredients can be changed appropriately depending on the form of the preparation, the method of application, the timing, location, and the occurrence of pathogenic bacteria.

The mixed active compound of the present invention may also be used, if necessary, with other agricultural chemicals, such as insecticides, fungicides, acaricides, nematicides, antiviral agents, herbicides, plant growth regulators, attractants, etc. [For example, organic phosphoric acid ester compounds, carbamate compounds, dithio (meaning thiol) carbamate compounds,
Organochlorine compounds, dinitro compounds, organic sulfur compounds, metal compounds, antibiotics, substituted diphenyl ether compounds, urea compounds, triazine compounds, etc.)t7'h
and/or fertilizer etc. can also be made to coexist.

Various ready-to-use preparations containing the active ingredients of the invention are available.
tion) are commonly used application methods and spraying methods (e.g., liquid dispersion (spraying), misting (mlstlng), atomizing (mlstlng),
atomizing), powder, powder, water surface application, ? pouring, etc.]: fumigation; soil application [e.g., contamination, sprlnkling, etc.]: fumigation;
), fumigation, irrigation, etc.]: Surface application (e.g., coating, banding, etc.)
Dust dressing, coating, etc.]: Can be done by dipping, etc. Also, the so-called ultra-high concentration small amount spraying method (ultra-1 part w-
volume ) can also be used from K. In this method, it is possible to contain up to 7J or IO units of active ingredient.

The application rate per unit area is approximately 0.03 to 10 kl of active compound per hectare, preferably 0.3 to 6
kg is used. However, in special cases it may be possible, and sometimes even necessary, to exceed or fall below these ranges.

The present invention uses a urea or thiourea compound represented by the above formula (,) as an active ingredient, and Hynodene, Pigit, Digterex, NoJ? 7 or 2 out of 5 types of bution or sunside, and a diluent (
Agricultural and horticultural fungicides are provided which contain fillers or carriers and/or solvents) and/or surfactants and, if necessary, organic raw materials.

Furthermore, the present invention provides a method of applying the mixed active compound of the present invention alone or as a diluent to the pathogen and/or the growth site of the pathogen.
A method for controlling plant diseases is provided in which the present invention is applied by mixing with an extender or a carrier and/or a solvent] and/or a surfactant and, if necessary, an organic raw material.

Next, the content of the present invention will be specifically explained with reference to Examples.
However, the present invention should not be limited to this only.

Example/(Irrigation agent) Compound &/'', 10 parts, hinodenum 2 parts, mixture of diatomaceous earth and kaolin (/:j) AO part, polyoxyethylene alkyl phenyl ether rst are pulverized and mixed to make an irrigation agent. The solution is diluted with water to 0/4 and sprayed onto the pathogen and/or the location where the pathogen grows.

Example 2 (powder) 77 parts of a mixture of talc and clay (/:3), 0.3 parts of isopropylhydrodane phosphate (PAP), 3 parts of guthione, Pulverize and mix to make a powder, and sprinkle it on the disease-causing microorganisms and/or where the disease-causing microorganisms grow.

Example 3 (granules) Compound A/3 parts of clay granules having a particle size distribution of 0.2 to 2 gourds were placed in a rotary mixer and dissolved in an organic solvent under rotation.
;/part, Dipterex Hirobe is sprayed and evenly stained, and then dried at ≠0-SO°C to form granules. This is scattered over areas where pathogenic bacteria and/or pathogenic bacteria grow.

Example P (Emulsion) The following compounds were mixed and stirred to form an emulsion: a part of the compound, a part of Pysite IAg, a part of xylene, 26 parts of dimethylformamide, and -lyoxyethylene alkylphenyl ether. Dilute this with water to o, i = s to remove pathogens and/or
Or spray the area where pathogens grow.

Example j (granules) Compound mul: 2 parts, Pigit r part, bentonite 10
1 part, 7 parts of a mixture of talc and clay (/:3), a mixture K of 2 parts of lignin sulfonate, and 2 parts of water, mixed well, and cut into pieces using an extrusion granulator to form a mixture of 20~≠
It is dried in the form of O mesh granules at IAO-jO°C to obtain granules. This is sprinkled on the disease-causing bacteria and/or the place where the disease-causing bacteria grow.

Example 6 (powder) Compound m/', 0. Evening part, 1 part Sunside, a mixture of talc and clay (/:3) Riot! Pulverize and mix to make a powder. This powder is sprinkled on the pathogen and/or the place where the pathogen grows.

When compared with active compounds already known from the literature, the mixed active compounds according to the invention are distinguished by a substantially improved efficacy as well as by a very low toxicity for warm-blooded animals, and therefore The compound is of great utility.

The unexpected superiority and remarkable effectiveness of the mixed active compounds of the present invention can be seen from the results of the following nine tests when used against rice sheath blight.

Test Example / Control effect test against rice sheath blight (/t test) Preparation of test compound A, when containing Digterex or Suncide, a predetermined concentration ratio of mixed active compound: jO parts by weight Carrier: diatomaceous earth and Mixture with kaolin (/:j)! J” parts by weight emulsifier:
Polyoxyethylene alkyl phenyl ether is prepared by grinding and mixing the above-mentioned amounts of the mixed active compound, carrier and emulsifier, and diluting the prescribed amount with water.

B. When containing hinodene, physite, or/mother gouthione, mixed active compounds at a predetermined concentration ratio: jO heavy emulsion composition: polyoxyethylene alkylphenyl ether 5 parts by weight xylene 2J
``parts by weight of dimethylformamide, 20 parts by weight, and the degree of damage, the control value was determined using the following formula.

Table 1 shows the test results (measured pest control width).

Table 1 Control value against rice sheath blight (section) Note: No chemical damage was observed in all the mixtures and single agent use in Test Example 1.

2 Compound of formula (a) used in the present invention: Compound genus I:

Claims (1)

[Claims] Formulas: ▲There are mathematical formulas, chemical formulas, tables, etc.▼(a) [In the formula, Y represents an oxygen atom or a sulfur atom. ] The urea or thiourea compound represented by the active ingredient (
1) and O-ethyl S,S as other active ingredient (b)
-diphenylphosphorodithiolate, O,O-dimethyl 4-methylthio-m-tolylphosphorothioate, O,O-dimethyl 2,2,2-trichloro-1-hydroxyethylphosphonate, S-[α-( ethoxycarbonyl)benzyl]O,O dimethyl phosphorothiorothionate or 2-isopropoxyphenyl N-methylcarbamate, which is effective with the active ingredient (a). The mixing weight ratio of component (b) is 1
:1 to 1:10, and the amount of the active ingredient (a) applied per unit area is about 1 kg per hectare.