JP2007161603A - Pest-controlling agent for paddy field - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a pest-controlling agent for paddy field capable of exterminating pest and weed on a paddy field with a single agent. <P>SOLUTION: The pest-controlling agent for paddy field contains 3,4-dichloro-isothiazole-5-carboxylic acid-2-cyanoanilide in combination with a herbicidal compound and/or an insecticidal compound. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a pest control agent for paddy fields. More specifically, the present invention relates to a pest control agent for paddy fields that can control pests and weeds occurring in paddy fields with a single agent.

  When controlling plant or animal pests in paddy rice cultivation, herbicides, insecticides, fungicides and the like are appropriately used according to the purpose. And when controlling pests at the same time, or when it can be applied at the same time due to their occurrence, etc., and when synergistic effects can be expected from simultaneous use, multiple types of control agents, especially insecticides and fungicides, are used in combination. ing. By using this so-called mixed agent, the number of times of use is reduced as compared with the case of using it individually, so that labor saving is greatly expected that work labor can be reduced. Further, when a synergistic effect is expected, the concentration of the drug itself can be reduced, and the mixed agent includes an advantageous element in terms of cost.

  Under such conditions of use of a mixed agent, a fungicidal insecticidal herbicidal composition suitable for simultaneous rice planting of a weed control agent and a pest control agent using a rice transplanting simultaneous herbicide spreader used in paddy rice cultivation is intended. It has been proposed (Patent Document 1).

Similarly, a mixed composition containing a specific fungicide, insecticide and herbicide has also been proposed (Patent Document 2).
JP 2002-114612 A JP 2003-95832 A

  The present inventors have conducted intensive research aimed at reducing work labor in paddy rice cultivation, improving efficiency and reducing costs related to agricultural materials, and establishing an efficient method of using drugs in pest control systems. In this case, when 3,4-dichloro-isothiazole-5-carboxylic acid-2-cyanoanilide, which exhibits a controlling activity against rice blast, is combined with a herbicidal active compound and / or an insecticidal active compound and applied simultaneously with rice planting, The inventors have found that the control effects of weed control after transplanting, prevention of blast disease occurrence, and pest control are particularly prominent, and the present invention has been completed.

  Thus, the present invention relates to a pest for paddy fields characterized by comprising 3,4-dichloro-isothiazole-5-carboxylic acid-2-cyanoanilide in combination with a herbicidal active compound and / or an insecticidal active compound. A control agent is provided.

  In addition, the present invention combines 3,4-dichloro-isothiazole-5-carboxylic acid-2-cyanoanilide with a herbicidal active compound and / or an insecticidal active compound, preferably using a rice transplanting simultaneous chemical spraying machine, At the same time, the present invention also provides a method for controlling pests in paddy fields characterized by being applied to paddy fields.

  3,4-dichloro-isothiazole-5-carboxylic acid-2-cyanoanilide in the present invention is a known compound as an agricultural and horticultural disease control agent disclosed in JP-T-2001-522840.

Examples of herbicidal active compounds used in combination with the above 3,4-dichloro-isothiazole-5-carboxylic acid-2-cyanoanilide according to the present invention include, for example, anilofos, beniocarb, butachlor, caventrol, cumylron, indanophan, dimethylpiperate, Fentrazamide, mefenacet, oxadiazone, oxadiclomephone, pentoxazone, pretilachlor, pyributycarb, pyriftalide, tenylchlor, oxadialgyl, butamifos, eprocarb, dithiopyr, etozanide, pyrinobacmethyl, HOK-201, cihalohop butyl, metamicyclobutyl , Benfrate, bensulfuron methyl, benzobicyclon, benzophenap, bromobutide, Daimron, dimetamethrin, ethoxysulfuron, imazosulfuron, pyrazolate, pyrazosulfuronethyl, quinoclamine, pyrazoxiphene, halosulfuron, pyraclonyl, pyrimisulfurphan (KUH021), TH-547, mesotrione, penoxram, orthosulfamron, cimethrin, bentazone, etc. These may be used alone or in combination of two or more. These are merely examples, and in addition to those exemplified above, any herbicidal active compound that can be used as a paddy control agent can be used as well.

  Examples of the insecticidal active compound used in combination with 3,4-dichloro-isothiazole-5-carboxylic acid-2-cyanoanilide according to the present invention include neonicotinyl insecticide, phenylpyrazole insecticide, carbamate insecticide, Examples include pyrethroid insecticides, and at least one selected from them can be used.

  Examples of the neonicotinyl insecticide include imidacloprid, thiacloprid, acetamiprid, clothianidin, thiamethoxam, dinotefuran, and the like. Examples of phenylpyrazole insecticides include fipronil, ethiprole, and carbamates. Examples of insecticides include propoxur, fenocarb, benfuracarb, carbosulfan and the like, and examples of pyrethroid insecticides include etofenprox, cyclosal and the like.

In the combination control agent of the present invention, the mixing ratio of each active ingredient is not limited, and the type of herbicidal active compound and insecticidal active compound to be mixed, the active expression effective amount, the prediction of occurrence of pests, etc. Can be varied over a relatively wide range. In general, the mixing ratio is, for example, 1 to 30 parts by weight, preferably 5 to 15 parts by weight of the herbicidal active compound per 1 part by weight of 3,4-dichloro-isothiazole-5-carboxylic acid-2-cyanoanilide. Parts and within a range of 0.5 to 3 parts by weight, preferably 1-2 parts by weight of the insecticidal active compound.

  The combination control agent of the present invention can exhibit a powerful control effect against rice blast, rice field weeds and paddy rice pests.

  When the combination control agent of the present invention is actually used, 3,4-dichloro-isothiazole-5-carboxylic acid-2-cyanoanilide and herbicidally active compound and / or using, for example, a rice planting herbicide sprayer. By applying a combination of insecticidal active compounds to paddy fields at the same time as transplanting paddy rice seedlings, it is possible to achieve accurate control of paddy pests.

  Therefore, according to the present invention, since the rice transplanting work and the agricultural chemical spraying work can be performed at the same time, it is possible to provide an advantageous control system from the viewpoint of labor saving.

  Examples of the paddy field weeds and paddy rice pests targeted by the control agent of the present invention include the following.

As paddy weed
Dicotyledons of the following genera : Polygonum, Rorippa, Roxala, Lindernia, Bidens, Dopatrium, Eclipta, The genus Elatine, Gratiola, Lindernia, Ludwigia, Oenanthe, Ranunculus, Deinostema, etc.

Monocotyledons of the following genera : Echinochloa, Milliform (Panicum), Vulgaris (Poa), Cyperus, Cyperus, Monochoria, Fimbristylis, Sagittaria, Hario (Eleocharis), Firefly (Scirpus), Heramodaka (Alisma), Iboxa (Aneilema), Subuta (Blyxa), Eriocaulon, Hiramushiro (Potamogeton), etc.

  More specifically, the control agent of the present invention can be used for the following representative paddy weeds, for example.

Plant name Latin name <br/> dicotyledonous plant Rotala indica Koehne
Azena Lindernia procumbens Philcox
Ludwigia prostrate Roxburgh
Potatogeton distinctus A. Benn
Elephine triandra Schk
Seri Oenanthe javanica
Monocotyledon Echinochloa oryzicola Vasing
Konagi Monochoria vaginalis Presl
Matsubai Eleocharis acicularis L.
Crogwai Eleocharis Kuroguwai Ohwi
Cyperus difformis L.
Cyperus serotinus Rottboel
Urikawa Sagittaria pygmaea Miq
Spoonfish Alisma canaliculatum A. Br. Et Bouche
Firefly Scirpus juncoides Roxburgh
As paddy rice pest
Hemiptera : Nephotettix cincticeps, Japanese brown planthopper (Nilaparvata lugens), Japanese brown planthopper (Laodelphax striatellus (Fallen)), White-tailed planthopper (Sogatella furcifera (Horvath)), etc.

Coleoptera : Rice beetle (Oulema oryzae (Kuwayama)), rice weevil (Lissorhoptrus oryzophilus Kuschel), etc.

Rice plant diseases such as rice blast (Pyricularia oryzae).

  However, the use of the control agent of the present invention is not limited to these weeds and pests, and can be similarly applied to other paddy weeds and paddy rice pests.

  When the control agent of the present invention is used for controlling paddy field weeds and paddy rice pests, it can be made into a usual preparation form. Examples of the dosage form include liquids, emulsions, wettable powders, flowable powders, wettable granules, granules, suspension emulsion concentrates, floating granules (jumbo agents), and microcapsules in a polymer substance. Can be mentioned.

  These preparations can be prepared by methods known per se. For example, each active ingredient as described above can be used as a spreading agent, i.e. a liquid and / or solid diluent, and if necessary further surfactants, i.e. emulsifiers and / or dispersants and / or foams. The preparation according to the present invention can be prepared by mixing with each other using an agent or the like.

  When water is used as the spreading agent, for example, an organic solvent can be used as an auxiliary solvent. Examples of the liquid diluent 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, mineral oil, vegetable oil etc.)], alcohols (eg butanol, glycol etc.) and their ethers or esters, ketones (eg acetone) And organic solvents such as methyl ethyl ketone, methyl isobutyl ketone, cyclohexanone, etc.) and strong polar solvents (for example, dimethylformamide, dimethyl sulfoxide, etc.) and water. Examples of solid diluents include ammonium salts or ground natural minerals (for example, kaolin, clay, talc, chalk, quartz, attapulgite, montmorillonite, diatomaceous earth, etc.), ground synthetic minerals (for example, highly dispersed silicic acid, alumina, silicic acid) Salt, etc.). Examples of the solid carrier for the granule include, for example, crushed and separated rock (for example, calcite, marble, pumice, gypsum, dolomite, etc.), synthetic particles of inorganic or organic powders, fine particles of organic substances The body (for example, sawdust, coconut fruit, corn cobs, tobacco stem, etc.) can be used.

  Examples of the surfactant include lignin sulfonate, alkyl phosphate, fatty acid salt, alkyl sulfonate, alkyl benzene sulfonate, alkyl naphthalene sulfonate, naphthalene sulfonate formalin condensate, and polyoxyalkylene alkyl ether sulfate. Salt, polyoxyalkylene alkyl phenyl ether sulfate, polyoxyalkylene tristyryl phenyl ether sulfate, polyoxyethylene-polyoxypropylene block polymer sulfate, dialkyl sulfosuccinate, polyoxyalkylene alkyl ether sulfosuccinate salt, polyoxy Anionic surfactants such as alkylene alkyl phenyl ether phosphate salts; polyoxyalkylene alkyl phenyl ether, polyoxyalkylene fatty acid ester , Polyoxyalkylene tristyryl phenyl ether, polyoxyalkylene alkylamine, sorbitan fatty acid ester, sucrose fatty acid ester, polyoxyalkylene sorbitan ester, glycerin fatty acid ester, polyoxyethylene-polyoxypropylene block polymer, polyoxyethylene-polyoxy Nonionic surfactants such as propylene block polymer alkylphenyl ethers; amphoteric surfactants such as aliphatic alkylbetaines and alkylammonium salts; cationic surfactants such as alkylpyridinium salts and polyethylene polyamine fatty acid amides .

  The sticking agent can also be used in preparations (powder, granules, emulsions), and examples of the sticking agent include carboxymethyl cellulose, natural or synthetic polymers (for example, gum arabic, polyvinyl alcohol, polyvinyl acetate, etc.), natural Examples thereof include phospholipids (for example, cephalins and lecithins) and synthetic phospholipids. Furthermore, mineral oils or vegetable oils can be used as additives.

  Colorants can also be used, such as inorganic pigments (eg, iron oxide, titanium oxide, Prussian blue, etc.), alizarin dyes, organic dyes such as azo dyes or metal phthalocyanine dyes, and further iron And trace elements such as metal salts such as manganese, boron, copper, cobalt, molybdenum, and zinc.

  Formulations can generally contain the active ingredients in a concentration of 0.1 to 95% by weight, preferably 0.5 to 90% by weight.

  The control agent of the present invention can be used as it is or in the form of a preparation for controlling paddy weeds and paddy rice pests. Moreover, the control agent of this invention can be used with the form of the mixture prepared previously, or it is also possible to use each active ingredient formulated separately by tank mixing at the time of use. Further, the control agent of the present invention includes other active compounds usually used in paddy fields, for example, fungicides, insecticides and / or herbicides other than those used in the present invention, plant growth regulators, plant nutrition An agent, a soil conditioner, a safener, etc. can be added as appropriate. Furthermore, at the time of transplanting (rice planting) of paddy rice seedlings, each active ingredient according to the present invention can be applied directly to the paddy field separately and simultaneously.

  The control agent of the present invention can be used as it is or in the form of those preparations or by further diluting the preparation, for example, a ready-to-use solution, a flowable agent, a jumbo agent, It can be used in the form of granule wettable powder or granules. The chemicals in these usage forms can be applied to paddy fields by methods such as undiluted hand shaking, dripping, throwing, and dusting.

  The control agent of the present invention can be applied to rice fields at the same time as rice planting, for example, using a rice planting simultaneous chemical spreader. The amount of the control agent that can be applied can vary within a substantial range. The application rate can be, for example, in the range of 0.5 to 5 kg / ha, preferably 1 to 3 kg / ha as the total amount of each active ingredient.

  The excellent effects of the control agent according to the present invention will be described more specifically with reference to the following examples. However, the present invention should not be limited to this.

Biological test example : Pest and weed control test
Reagents M-1: Fentrazamide 3% + Bensulfuron methyl 0.51% + Bromobutide 9% + Diemron 4.5% Granules M-2: Fentrazamide 2% + Bensulfuron methyl 0.51% + Bromobutide 7.
5% + Dimron 4.5% granules F-1: 3,4-Dichloro-isothiazole-5-carboxylic acid-2-cyanoanilide
3% granules I-1: Imidacloprid 1% granules H-1: Fentrazamide 3% granules IF-1: Tricyclazole 4% + Imidacloprid 2% granules
Status of occurrence of pests and weeds Rice blast: Low incidence (spontaneous illness), first confirmation: July 7, 2005.
Pests: Himetobikoka: Moderately occurring (naturally occurring), Rice weevil: Moderately occurring (naturally occurring)
Raw) Tuna leafhopper: Small occurrence (natural occurrence).
Paddy field weeds: Nobies (multiple occurrence), Kogi (small outbreak), annual broadleaf (small outbreak), firefly
(Many occurrences), Matsubai (Small occurrence) (Spontaneous occurrence above), Scratch (Medium occurrence)
(Inoculation and spontaneous occurrence).
Cultivation overview (variety, fertilization, general management)
Rice varieties: Koshihikari, young seedling machine transplant (Transplant date: May 23, 2005).
Rice leaf age at transplanting: 2.5 Fertilization and other general management were in accordance with local practices.
Field conditions Soil properties: Alluvial / soil soil Depth of water: Less than about 0.5cm / day Test scale: 5m ² 1 ward system.
District system / Area 1 area 15m ² (2 × 2.5m) × 3 (Each fungus, insect, grass survey area) No repetition
Effect of treatment date, amount, method, crop stage during treatment, and rainfall before and after treatment May 23, 2005 (the day of rice transplanting), the test zone immediately after transplanting is surrounded by azenami, and the water depth is about 2 cm. The reagent agent was sprayed with water so as to be uniform over the entire surface of the predetermined test section. During the test period, there was no significant change in the natural environment that affected the test.
Survey date / method Rice blast: 50 days after treatment (July 12), 59 days (July 21), 67 days (July 29)
3 times a day), the number of diseased strains of 28 strains per ward and the number of disease groups per strain were investigated. Foliage
The phytotoxicity of the department was investigated by visual observation according to the following criteria at any time.
-: None, ±: Slight (± is no practical problem), +: Light, ++: Medium, +++: Amber. Paddy rice pests: Survey date; feeding damage caused by rice weevil adults 39 days after drug treatment (July 1)
The number of insects of parasitic planthoppers and leafhoppers, and 60 days after drug treatment (July 22
The number of insects of leafhoppers and leafhoppers infested in Japan) was investigated.

Method: Leafhoppers, leafhoppers, cormorant parasitizing 30 strains using the adhesive stripping method
The number of insects of the leafhopper and leafhopper was investigated and the control value was calculated. Rice weevil;
For 30 strains, the damage of adult insects was judged in 6 levels from 0 to 5, and the damage degree and
The control value was calculated.

Evaluation of food damage (index)
0: No food damage
1: 1 to 2 mm long food damage marks per strain,
2: About 1 to 2 mm long food damage marks per strain,
In addition to 3: 2, some 5mm eating damage marks are scattered,
4: Some damage marks are connected, and the whole stock looks white.
5: Strains turn white due to food damage and growth is poor.

Damage degree = 0xN0 + 1xN1 + 2xN2 + 4xN3 + 6xN4 + 8xN5 / 8x (N0 + N1 + N2 + N3 + N4 + N5) x 100
N0: number of strains with damage 0, N1: number of strains with damage 1, N2: number of strains with damage 2, N3:
Number of shares of damage 3; N4: number of shares of damage 4; N5: number of shares of damage 5.

Control value = (Non-treatment damage level-Damage level of treatment area) / Non-treatment area damage degree × 100
Control value = (number of untreated insects−number of insects in treated area) / number of insects in untreated area × 100
Rice field weeds: Evaluate medicinal damage using the following evaluation criteria of 0 to 100 by visual observation.
It was.

          Medicinal effect: 0 = no effect, 90 or more = practically effective, 100 = complete death.

Drug damage: 0 = no phytotoxicity, 10 or less = slight phytotoxicity with no practical problems, 100 = complete
All withered.

  Medicinal effects are 51 days after treatment (July 13), and for phytotoxicity, treatment 15 days (June 7), 20 days (June 12), 29 days (June 21), 44 days (July) 6 days) and 62 days later (July 24th).

Formulation Example 3 parts by weight of fentolazamide, 0.51 part by weight of bensulfuron methyl, 9 parts by weight of bromobutide, 4.5 parts by weight of dimlon, 3 parts by weight of 3,4-dichloro-isothiazole-5-carboxylic acid-2-cyanoanilide, Extruder type granulator which is well hatched by adding 25 parts by weight of water to a mixture of 3 parts by weight of imidacloprid, 25 parts by weight of bentonite (montmorillonite), 48.9 parts by weight of talc (talc) and 3 parts by weight of lignin sulfonate. To form a granule of 10 to 40 mesh and dried at 40 to 50 ° C.

Claims (8)

  A pest control agent for paddy fields comprising 3,4-dichloro-isothiazole-5-carboxylic acid-2-cyanoanilide in combination with a herbicidal active compound and / or an insecticidal active compound.   Herbicidal active compounds are anilofos, beniocarb, butachlor, caffeotrol, cumylron, indanophan, dimepiperate, fentrazamide, mefenacet, oxadiazone, oxadiclomephone, pentoxazone, pretilachlor, pyributicarb, pyriftalide, tenylchlor, oxadialgyl, butamifos dipyrtodo , HOK-201, cyhalohop butyl, metamiphos, chromeprop, cyclosulfamuron, benfresate, bensulfuron methyl, benzobicyclone, benzophenap, bromobutide, diemron, dimetamethrin, ethoxysulfuron, imazosulfuron, pyrazolate, pyrazosulfuron Ethyl, quinoclamine, pyrazo The harmfulness for paddy fields according to claim 1, which is at least one selected from the group consisting of siphen, halosulfuron, pyraclonyl, pyrimisulphan (KUH021), TH-547, mesotrione, penoxram, orthosulfamlone, cimethrin and bentazone. Biocontrol agent.   The pest control agent for paddy fields according to claim 1, wherein the insecticidal active compound is at least one selected from the group consisting of neonicotinyl insecticide, phenylpyrazole insecticide, carbamate insecticide and pyrethroid insecticide.   The pest control agent for paddy fields according to claim 3, wherein the neonicotinyl insecticide is imidacloprid, thiacloprid, acetamiprid, clothianidin, thiamethoxam or dinotefuran.   The pest control agent for paddy fields according to claim 3, wherein the phenylpyrazole insecticide is fipronil or etiprol.   The pest control agent for paddy fields according to claim 3, wherein the carbamate insecticide is propoxur, fenobucarb, benfuracarb or carbosulfan.   4. The pest control agent for paddy fields according to claim 3, wherein the pyrethroid insecticide is etofenprox or cyclosal.   Pest control in paddy field characterized by applying 3,4-dichloro-isothiazole-5-carboxylic acid-2-cyanoanilide to paddy field simultaneously with paddy rice transplantation in combination with herbicidal active compound and / or insecticidal active compound Method.