JP2002265309A - Insecticidal/fungicidal composition - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain an excellent insecticidal/fungicidal composition as a controller for insect pests in paddy-rice plants and blast neck rot of rice plant. SOLUTION: This insecticidal/fungicidal composition comprises emamectin or its salt and a controller for blast neck rot of rice plant ((1RS,3SR)-2,2- dichloro-N-[1-(4-chlorophenyl)ethyl]-1-ethyl-3-methylcyclopropanecarbo xamide, 2-cyano-N-[1-(2,4-dichlorophenyl)ethyl]-3,3-/1-dimethylbutanamide, 3-allyloxy-1,2- benzoisothiazole-1,1-dioxide, 1,2,5,6-tetrahydropyrrolo[3,2,1-ij]quinolin-4-one or 5-methyl-1,2,4-triazolo[3,4-b]benzothiazole) as active ingredients.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a novel insecticidal / bactericidal composition comprising a known emamectin or a salt thereof having an insecticidal action, and a rice blast control agent.

[0002]

2. Description of the Related Art Emamectin and its salts are 16-membered ring macrolide compounds produced from pesticidal abamectin as a starting material (EP-A-89202, EP-A-89202).
A-301806, Journal of Organic Chemistry, 5
9 , 7704-7708, (1994) and U.S. Pat. No. 5,288,710), which are used as insecticides and acaricides, and are also known to be used in combination with insecticides (PCT International). Public WO 99/251
87 pamphlet, PCT International Publication WO 00/024
53 brochure).

[0003]

In recent years, in rice cultivation, mechanical transplantation using a seedling transplanter has been widely carried out. In addition to labor saving by simultaneous control of pests and crop diseases in rice paddy rice fields, seedlings of chemicals at the time of raising seedlings. Labor saving of pest control by box application or seed treatment is being attempted.

[0004] Further, reduction of the amount of pesticide used and the number of times of use are strongly desired from the viewpoint of safety and environmental protection, and the use of even lower chemical amount is being studied.

[0005] In rice cultivation, in particular, for example, lepidopteran pests (such as Nicamechu and Kobumemeiga), which are important pests to be controlled, and pests which are important to be controlled, such as rice blast, which are important pests to be controlled. It is expected that labor saving and further improvement in safety will be achieved by simultaneous pest control.

[0006]

Means for Solving the Problems The present inventors have conducted intensive studies in order to meet the above-mentioned expectations. As a result, this time, the combination of emamectin or a salt thereof with a rice blast control agent was evaluated as a combination of rice blast and rice blast. The present inventors have found that they exhibit an excellent insecticidal / bactericidal action against diseases, and have completed the present invention.

[0007] Thus, according to the present invention, there is provided an insecticidal / bactericidal composition comprising emamectin or a salt thereof and a rice blast control agent as active ingredients.

The insecticidal and fungicidal composition of the present invention surprisingly has a remarkable synergistic and synergistic insecticidal effect by mixing, which cannot be expected from the insecticidal effect when emamectin or a salt thereof is used alone. Therefore, the insecticidal / bactericidal composition of the present invention exhibits an excellent insecticidal effect at a much lower dosage than rice blast, compared to the case of using emamectin and the rice blast control agent alone. It shows an excellent control effect against diseases.

In addition, the insecticidal / bactericidal composition of the present invention is particularly useful as a major insect pest of rice, such as Lepidoptera pest, which has acquired resistance to existing chemicals (organophosphorus and carbamate insecticides). At the same time, it exhibits an excellent effect on rice thrips, which are pests of the order Thysanoptera, and rice blast, which is the greatest disease against rice.

Hereinafter, the fungicidal and insecticidal composition of the present invention and a method for controlling rice blast and rice blast using a combination of emamectin or a salt thereof and a rice blast control agent will be described in further detail.

[0011]

DETAILED DESCRIPTION OF THE INVENTION Emamectin used in the insecticidal and bactericidal mixture of the present invention is 4 "-deoxy-4"-.
It is a mixture of epimethylaminoavermectin Bla (emamectin Bla) and 4 "-deoxy-4" -epimethylaminoavermectin Blb (emamectin Blb) (U.S. Pat. No. 4,874,749, Journa
l of Organic Chemistry, 59 , 7704-7708
(See MK-244 described in (1994)), and in the present invention, emamectin can be used as a free base or in the form of a salt with an inorganic acid or an organic acid. Examples of salts of emamectin include inorganic acid salts such as hydrochloride (see US Pat. No. 4,874,749), phosphate (see US Pat. No. 5,288,710), and the like. Examples of the organic acid salt include benzenesulfonate, maleate, citrate, gallate, benzoate, and salicylate (see US Pat. No. 5,288,710).

Among the above-mentioned emamectins or salts thereof, in particular, emamectin benzoate (emamectin Bl
a Mixture of benzoate and emamectin Blb benzoate, The Pesticide Manual A World Compendium, Twelf
th Edition (2000), TheBritish Crop Protectio
n Refer to the Council).

In the insecticidal / bactericidal composition of the present invention, examples of the rice blast control agent used in combination with the above-mentioned emamectin or a salt thereof include (1RS, 3SR)
-2,2-dichloro-N- [1- (4-chlorophenyl) ethyl] -1-ethyl-3-methylcyclopropanecarboxamide (general name: carpropamide), 2-cyano-N- [1- (2,4 -Dichlorophenyl) ethyl]
-3,3-dimethylbutanamide (generic name: diclosimet), 3-allyloxy-1,2-benzoisothiazole-1,1-dioxide (generic name: probenazole), 1,2,5,6-tetrahydropyrrolo [ 3,2,1-
ij] quinolin-4-one (generic name: pyroquilon), 5
-Methyl-1,2,4-triazolo [3,4-b] benzothiazole (generic name: tricyclazole) and the like (for these compounds, for example, The Pestic
ide ManualA World Compendium, Twelfth Edition (2
000), published by The British Crop Protection Council, see Japanese Patent Application Laid-Open No. 2-76846), but are not limited thereto.

In the insecticidal / bactericidal composition of the present invention, the mixing ratio of emamectin or a salt thereof and the rice blast control agent is not strictly limited, and the use of the composition and the type of rice blast control agent are not limited. Although it can be changed within a wide range depending on the like, generally, emamectin or its salt 1
The rice blast control agent is 0.1 to 2,000 parts by weight.
Although it can be used in the range of 0.00000 parts by weight, preferably 1 to 1,000,000 parts by weight, the above mixing ratio also takes into account the type of pest to be controlled and the degree of occurrence of disease. And can be changed as needed.

The insecticidal / bactericidal composition provided by the present invention exhibits excellent insecticidal and fungicidal activity, and is used as an insecticide / bactericidal agent, for example, foliage application, water or surface application, soil application, soil mixing treatment, seedling raising It can be used in a wide range of application forms such as box application and seed treatment, and preferably includes water surface application, nursery box application and seed treatment.

The insecticidal / bactericidal composition according to the present invention has no phytotoxicity to cultivated plants and has low toxicity to warm-blooded animals, and as a pesticide, it is particularly effective in protecting pests in protecting rice, especially pests of rice cultivation and rice blast. It can be used for precise control. Insecticidal and fungicidal compositions according to the present invention are typically used against susceptible and resistant pests and diseased species.
It is active for all or some of these growth stages.

The pests and pests to be controlled by the present invention (hereinafter sometimes referred to as pests) include, for example, the following.

As the pests, for example, lepidopteran pests (Le
pidoptera) and Thysanoptera pests. In particular, the flies of the order Lepidopteran pests (Cnaphalocrocis medinalis) and Nikameyu (Chil)
o suppressalis); Thrips (Chloethrips oryzae) belonging to the order Thysanoptera can be mentioned as the insecticidal spectrum of the insecticidal / bactericidal composition of the present invention.

Examples of the disease bacteria include imperfect fungi (De
uteromycetes). In particular, Pyricularia oryzae belonging to imperfect fungi can be mentioned.

The insecticidal / bactericidal composition of the present invention can be made into a usual preparation in the form of a mixture of emamectin or a salt thereof and a rice blast control agent upon actual application. As the form, for example, liquid, emulsion, wettable powder, suspension, powder, granule, granular wettable powder, aerosol,
Active compound infiltration-natural and synthetic, microcapsules,
Seed coating agent, ULV [cold mist
t), warm mist] and the like.

These preparations can be manufactured by a method known per se. For example, emamectin or a salt thereof and a rice blast control agent (hereinafter sometimes collectively referred to as the active ingredient of the present invention) are used as a developing agent, that is, a liquid diluent or carrier, a liquefied gas diluent or carrier, a solid diluent. It can be prepared by mixing with an agent or carrier and, optionally, a surfactant, ie, an emulsifier and / or dispersant. When water is used as a developing agent, an organic solvent can be used as an auxiliary solvent.

Examples of the liquid diluent or carrier include aromatic hydrocarbons (eg, xylene, toluene, alkylnaphthalene, etc.), chlorinated aromatic or chlorinated aliphatic hydrocarbons (eg, chlorobenzene, ethylene chloride, Methylene chloride, etc.), aliphatic hydrocarbons [eg, cyclohexane, paraffins (eg, mineral oil fraction), etc.], alcohols (eg, butanol, glycol and their ethers or esters), ketones (eg, acetone, Methyl ethyl ketone, methyl isobutyl ketone,
Cyclohexanone), strong polar solvents (eg, dimethylformamide, dimethylsulfoxide, etc.), water and the like.

The liquefied gas diluent or carrier is a gaseous substance at normal temperature and normal pressure, and examples thereof include aerosol propellants such as butane, propane, nitrogen gas, carbon dioxide, and halogenated hydrocarbons.

Examples of the solid diluent include ground natural minerals (eg, kaolin, clay, talc, chalk, quartz, attapull guide, montmorillonite, diatomaceous earth, etc.) and ground synthetic minerals (eg, highly dispersed silicic acid, alumina, silicate) And the like).

Examples of solid carriers for granules include:
Crushed and sorted rocks (eg, calcite, marble, pumice, sepiolite, dolomite, etc.), synthetic grains of inorganic and organic powders,
Fine particles of organic substances (eg, sawdust, coconut, corn cob, and tobacco stem) can be mentioned.

Examples of the emulsifier and / or foaming agent include nonionic and anionic emulsifiers [eg, polyoxyethylene fatty acid ester, polyoxyethylene fatty acid alcohol ether (eg, alkylaryl polyglycol ether), alkyl sulfonate, alkyl sulfate] Salts, Aryl Sulfonates, etc.] and albumin hydrolysis products.

Examples of the dispersant include lignin sulfite waste liquor, methyl cellulose and the like.

Fixatives can also be used in the preparations (powder, granules, emulsions), such as carboxymethylcellulose, natural and synthetic polymers (eg gum arabic, polyvinyl alcohol, polyvinyl acetate, etc.). Can be mentioned.

A coloring agent may be used. Examples of the coloring agent include inorganic pigments (eg, iron oxide, titanium oxide, Prussian blue, etc.) and organic dyes (eg, alizarin dye, azo dye, metal phthalocyanine dye, etc.). And a trace element such as a salt of a metal such as iron, manganese, boron, copper, cobalt, molybdenum, and zinc.

Said preparations can generally contain the active ingredient of the present invention in the range of 0.1 to 95% by weight, preferably 0.5 to 90% by weight.

The insecticidal / bactericidal composition of the present invention can be used in the form of a pre-produced preparation, or can be used as a tank mix of each active compound immediately before use.

The combined insecticide / bactericidal compositions of the present invention may be in their commercially useful formulations, in the use forms prepared from those formulations, as well as agriculturally active ingredients such as other insecticides and And / or a fungicide, a growth regulator, a fertilizer, a herbicide, and the like can coexist.

Examples of the other insecticides include neonicotinoid insecticides (eg, imidacloprid, thiacloprid, clothianidin, nitenpyram, dinotefuran, thiamethoxam, acetamiprid, etc.).

The insecticidal / bactericidal composition of the present invention is suitable for application to Honda (paddy field), application of a nursery box for rice, or seed treatment of rice.

The content of the insecticidal / bactericidal composition of the present invention in a commercially useful use form can be varied within a wide range.
For example, it can be in the range of 0.00000001 to 100% by weight, preferably 0.01 to 80% by weight.

For example, in the treatment of rice plants in Honda application, the concentration of the active ingredient of the present invention in the actual use form can be varied within a substantial range, and is generally 0.000001 to 1% by weight, preferably Is 0.0001 ~
It can be in the range of 0.5% by weight.

In the treatment of rice seedlings in a nursery box application, the active ingredient of the present invention is treated with a nursery box (30 × 60 × 3c).
m, about 5 l of soil used)
It can be used within a range of 100 g, preferably 0.01 to 50 g.

In seed treatment, the active ingredient of the present invention can be used in a range of generally 0.006 to 600 g, preferably 0.06 to 300 g per kg of seed.

Next, the present invention will be described more specifically with reference to examples, but the present invention should not be limited to these examples. In addition,% and part are weight% and part by weight unless otherwise specified.

[0040]

EXAMPLES Biological Test Examples Test compounds: (1) 4 "-deoxy-4" -epimethylaminoavermectin Bla benzoate and 4 "-deoxy-4"-
Mixture with epimethylaminoavermectin Blb benzoate (emamectin benzoate) (2-1) 1,2,5,6-tetrahydropyrrolo [3,
2,1-ij] quinolin-4-one (generic name: pyroquinone) (2-2) (1RS, 3SR) -2,2-dichloro-N
-[1- (4-chlorophenyl) ethyl] -1-ethyl-3-methylcyclopropanecarboxamide (generic name:
Carpropamide) (2-3) 3-allyloxy-1,2-benzoisothiazole-1,1-dioxide (generic name: probenazole) (2-4) 5-methyl-1,2,4-triazolo [3,
4-b] Benzothiazole (generic name: tricyclazole) Example 1 (biological test) <Effects of foliage application to the flea beetle> Reagents (a) Emamectin benzoate 1% emulsion for emamectin single use (trade name) : Affirm emulsion) was diluted with a 2000-fold aqueous solution of a neoesterin spreading agent to prepare a drug solution having a predetermined concentration. (B) For fungicide single use, 7 parts of dimethylformamide and 3 parts of polyoxyethylene alkylphenyl ether 3
2 parts of the fungicide compound was dissolved in the mixture of the above, and the disinfectant compound was dissolved in a 2000-fold aqueous solution of the neoesterin as a spreading agent.
The drug solution was prepared by diluting the solution to 00 ppm. (C) For the emamectin / bactericide mixture, emamectin was diluted using the fungicide diluent prepared in (2) above to prepare a drug solution having a predetermined concentration. (D) In the control group, a diluent containing only the spreading agent was used. Test crop Rice seed fir in a 9 cm diameter plastic pot filled with soil 1
0 seeds were sown, and seedlings after 6 weeks were used. Test Insects The second-instar larvae of the larvae of the larva of the breeding fever, which have been bred successively in our laboratory, were used. Treatment Method A chemical solution having a predetermined concentration is sprayed on rice seedlings using an automatic spraying device, and air-dried. Then, the rice leaves are cut off and placed in a 9 cm-diameter glass Petri dish covered with moistened filter paper. It is inoculated with 5 larvae of the larva. The treated rice leaves (test crop) are replenished as feed every two days. After 2 days and 7 days, the life and death of the flies are examined, and the insecticidal rate is determined from the results after 7 days. The test was performed in duplicate. Table 1 shows the results.

[0041]

[Table 1]

[0042]

The insecticidal / bactericidal mixed composition of the present invention has excellent properties as an agent for controlling rice crop pests and rice blast in paddy rice, as shown in the above biological test examples.

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) A01N 53/12 A01N 53/00 510

Claims (5)

[Claims] 1. An insecticidal / bactericidal composition comprising, as active ingredients, emamectin or a salt thereof and a rice blast control agent. 2. The rice blast control agent comprises (1RS, 3SR) -2,2-dichloro-N- [1- (4
-Chlorophenyl) ethyl] -1-ethyl-3-methylcyclopropanecarboxamide (generic name: carpropamide), 2-cyano-N- [1- (2,4-dichlorophenyl)
Ethyl] -3,3-dimethylbutanamide (generic name: diclosimet), 3-allyloxy-1,2-benzoisothiazole-1,
1-dioxide (generic name: probenazole), 1,2,5,6-tetrahydropyrrolo [3,2,1-ij]
The insecticide according to claim 1, wherein the insecticidal substance is selected from quinolin-4-one (generic name: pyroquilon) and 5-methyl-1,2,4-triazolo [3,4-b] benzothiazole (generic name: tricyclazole). Disinfecting composition. 3. A method for controlling pests of rice cultivation and rice blast, comprising using the insecticidal / bactericidal composition according to claim 1 or 2. 4. The method according to claim 3, wherein the method is applied to a nursery box. 5. The method according to claim 3, wherein the method is applied to Honda.