JP2008143809A - Method for prophylaxis of disease and insect pest damage to paddy rice - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method with which elution properties of an agriculturally active ingredient having control effects on disease and insect pests of paddy rice are controlled and prophylaxis of main disease and insect pest damage, particularly pecky rice by stink bugs can be carried out throughout a paddy rice cultivation period by a chemical treatment once in a nursery box. <P>SOLUTION: The method for the prophylaxis of the disease and/or insect pest damage to the paddy rice from the time of seeding to the harvesting is carried out as follows: a sustained release granule prepared by coating the periphery of a granulated core chemical comprising (RS)-1-methyl-2-nitro-3-(3-tetrahydrofurylmethyl)guanidine (generic name: dinotefuran) or 3-(2-chloro-1,3-thidiazol-5-ylmethyl)-5-methyl-1,3,5-oxadiazinan-4-ylidene(nitro)amine (generic name: thiamethoxam) as the active ingredient and a sparing water-soluble thermoplastic material with the sparingly water-soluble thermoplastic material is applied to the paddy rice nursery box. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a pest control method using a pesticide preparation containing a pest that causes damage to crops and a drug capable of protecting the crops from diseases, and more specifically, controls the dissolution of active ingredients. The present invention relates to a method for preventing pest damage in paddy rice using a sustained-release pesticide preparation capable of preventing pest damage from seeding to harvest time, regardless of treatment from seeding to rice planting.

  In recent years, paddy fields have been rapidly scaled up and mechanized to reduce the cost of rice cultivation. In response to this, technological innovation related to the spraying method of agricultural chemicals has progressed, and various labor-saving preparations and spraying methods have been studied. On the other hand, in recent years, labor saving of pesticide spraying has been demanded due to the problem of decrease in agricultural workers or aging. Under such circumstances, in the field of pest control, a large number of drugs corresponding to the treatment before the time of rice planting represented by the seedling box treatment have been developed, and as a result, Honda spraying that requires a lot of labor is required. The scene is decreasing compared to before. However, recently, during the latter half of the growing season, a large number of sucking pests such as stink bugs and planthoppers around the heading season and lepidopterous pests such as Phytophyllum have become a national problem. Since these pests cannot be sufficiently controlled by pre-planting treatment with a commercially available formulation, even in paddy fields that have been subjected to chemical treatment prior to rice planting, it is inevitable that pesticides must be controlled by spraying Honda in the late stages of growth of appropriate drugs. Moreover, the positive list system was enforced in July 2006, and the drift of the agrochemical component by agrochemical spraying is regarded as a problem. In view of the above, there is a strong demand for a method for preventing pest damage from harvesting to the harvest time by one chemical treatment in the seedling box, that is, eliminating chemical control during the treatment.

  From such a background, Japanese Patent Application Laid-Open No. 2004-043436 discloses that a sustained release coating preparation obtained by coating a core material containing an agrochemical active ingredient with a water-insoluble or poorly water-soluble film is produced at the heading stage. A method for controlling stink bugs has been proposed. However, there is no description regarding the core agent in the specification, and only “core agent (agrochemical active ingredient, carrier, surfactant, etc.)” is described in the figure. Further, the specification does not include any description about the carrier of the core agent, the surfactant and the like. In particular, spotted rice damage caused by stink bugs is known to affect the grade of rice even if it occurs only slightly. According to the criteria for coloring rice by the Ministry of Agriculture, Forestry and Fisheries, the spotted rice rate is 0.1% or less. First grade rice, less than 0.3% second grade rice, 0.7% or less third grade rice, and if it exceeds 0.7%, it is out of grade. The test for stink bugs in Test Examples 1 and 4 of this specification has a spotted rice rate of 0.7%, which corresponds to third-class rice. Therefore, although superior to no treatment, it cannot be said to be a sufficient spotted rice suppression effect. Moreover, the said result is the test which is implementing the pot test after processing to a seedling box, and does not clearly show that there exists sufficient effect in a more severe field test. In addition, sustained release coating preparations obtained by coating a core material containing an agrochemical active ingredient with a water-insoluble or poorly water-soluble film are already known, and at the same time, the test period of rice weevil and white-spotted plant as shown in the examples The control effect in is in the expected range, and is not effective in controlling paddy rice pests occurring before heading.

Further, JP 2002-179504 A and JP 2002-179505 A, which are patents relating to the formulation and preparation method, do not particularly describe the pest control effect.
JP 2004-043436 A JP 2002-179504 A JP 2002-179505 A

  The present invention controls the dissolution of agrochemical active ingredients having a controlling effect on paddy rice pests, and can prevent major pest damage, especially stink bug spot rice, throughout the paddy rice cultivation period with a single chemical treatment in a nursery box. It is an object to provide a possible method.

  As a result of diligent research and examination to solve the above-mentioned problems, the present inventors have (RS) -1-methyl-2-nitro-3- (3-tetrahydrofurylmethyl) guanidine (generic name: dinotefuran), Alternatively, 3- (2-chloro-1,3-thiazol-5-ylmethyl) -5-methyl-1,3,5-oxadiazinan-4-ylidene (nitro) amine (generic name: thiamethoxam) as an active ingredient, By applying a sustained-release granule coated with a poorly water-soluble thermoplastic material around a core granule containing a sparingly soluble thermoplastic material to a paddy rice nursery box, stink bugs at the later stage of heading The present inventors have found that paddy rice pest damage from seeding to harvesting, including rice damage, can be prevented.

  That is, the present invention provides a sustained-release granule in which the periphery of a core granule containing dinotefuran or thiamethoxam as an active ingredient and containing a water-insoluble thermoplastic material is coated with a water-insoluble thermoplastic material. Is applied to a paddy rice seedling box, and is a method for preventing paddy rice disease and / or pest damage from seeding to harvest.

  According to the preventive method of the present invention, by applying it to paddy rice seedling boxes, it is difficult to do with existing commercial preparations, including stink bug spotted rice damage at the late stage of heading, planthoppers, and other lepidopterous pests, from seeding to harvest. It can prevent paddy rice diseases. Moreover, since the damage of major pests can be prevented throughout the paddy rice cultivation period by one chemical treatment in the seedling box, labor saving can be greatly achieved.

  The sustained-release granules used in the present invention include at least dinotefuran or thiamethoxam in the core, and the periphery of the core granule containing a thermoplastic material that is sparingly soluble in water is difficult for water. This refers to sustained-release granules coated with a soluble thermoplastic material. The water-insoluble thermoplastic material used for the core granulated product is a material that contributes to the integration of the powdery dinotefuran and inorganic diluent carrier contained therein and to the sustained release of dinotefuran.

  The thermoplastic material is an organic substance that is solid at room temperature and has a water solubility of less than 0.5% at 20 ° C., and has a melting point of 70 to 110 ° C., preferably 72 to 100 ° C., more preferably 74 to 98. Refers to the temperature range. Specifically, plant waxes such as candelilla wax, sugarken wax, rice wax, mineral waxes such as montanic acid wax, ozokerite, ceresin, petroleum waxes such as microcrystalline wax and petrolatum, Fischer-Tropsch wax, etc. Synthetic hydrocarbon, modified wax such as montanic acid wax derivative, paraffin wax derivative, microcrystalline wax derivative, hydrogenated wax of hydrogenated castor oil, hydrogenated castor oil derivative, 12-hydroxystearic acid, stearamide, phthalimide anhydride, Further, fatty acids having a chlorinated hydrocarbon group, acid amides, esters, ketones and the like can be mentioned. Especially, according to the test method prescribed | regulated to ASTMD1386, as an acid value calculated | required by titration using an alkali, an acid value of 10 mgKOH / g or more is preferable. For example, sugarken wax (melting point: 75 ° C., acid value: about 21 mg KOH / g) and montanic acid wax (manufactured by BASF, trade name Luwax S, melting point: 75-85 ° C., acid value: 135-160 mg KOH / g), Montanic acid ester wax (manufactured by BASF, trade name Luwax E, melting point: 75 to 85 ° C., acid value: 10 to 25 mg KOH / g) and the like are particularly suitable.

  These waxes and thermoplastic materials may be used alone or in combination of two or more. The total amount of the thermoplastic material used is usually selected to be 5% by mass or more, preferably 10% by mass or more, based on the total weight of the core granule constituting the sustained-release agrochemical granule. In consideration of the amount of dinotefuran or thiamethoxam, the physical properties of the inorganic diluent carrier and the amount thereof, it can be determined appropriately. Preferably, from the economical viewpoint, the upper limit of the addition amount of the thermoplastic material is selected to be 20% by mass.

  The inorganic diluent carrier for the core granulated product is not particularly limited as long as it shows at least almost no water solubility. For example, clay, quartzite, talc, bentonite, calcium carbonate, pumice, diatomaceous earth, vermiculite, Examples thereof include pearlite, attapulgite, amorphous hydrous silicic acid, and so-called white carbon. One or more so-called extenders and carriers, which are usually used for agricultural chemical powders and granules, can be used in combination.

  In addition to the inorganic diluent carrier, various additives such as an antioxidant, an ultraviolet absorber, and an antistatic agent are added to the core granulated product within a range that does not impair the purpose and effect of the present invention. You can also. Examples of antioxidants include hindered phenol antioxidants, sulfur antioxidants, phosphorus antioxidants, amine antioxidants, lactone antioxidants, vitamin E antioxidants, and the like. It is done. Examples of the UV absorber include inorganic compound UV absorbers such as titanium dioxide, and organic compound UV absorbers such as benzotriazole, benzophenone, triazine, benzoate, and salicylate. In that case, these antioxidants and ultraviolet absorbers may be added as necessary, and may be blended in an amount in which the effect is recognized.

Furthermore, examples of the antistatic agent include inorganic compounds such as titanium oxide, zinc oxide, and magnesium oxide, and calcium phosphate compounds. Further, phosphate ester surfactants such as polyoxyethylene alkyl ether phosphates can also be used as antistatic agents. In addition, what is necessary is just to use an antistatic agent as needed, and should just make it the quantity which the antistatic effect is recognized in the range which does not impair the objective and effect of this invention.
In the sustained-release granules used in the present invention, the thermoplastic material to be coated can be used with or without the addition of insecticides or bactericides.

  Insecticides that can be added include isoxathione, chlorpyrifosmethyl, dimethylbinphos, diazinon, pyridafenthione, propaphos, marathon, EPN, DEP, PAP, MIPC, MPP, MEP, carbosulfan, thiodicarb, benfuracarb, XMC, carbofuran, BPC, NAC, cycloprotorin, silafluophene, etofenprox, cartap, thiocyclam, bensultap, dinotefuran, imidacloprid, clothianidin, dinotefuran, thiacloprid, thiamethoxam, nitenpyram, chromafenozide, tebufenozide, methoxyphenodine, fipronil sulfate, etiprolide, fipronil sulfate , Buprofezin, and general formula (A)

[Wherein R11 represents a methyl group or a chloro group, R12 represents a methyl group, a chloro group, a bromo group or a cyano group, R13 represents a chloro group, a bromo group, a trifluoromethyl group or a cyanomethoxy group, Represents a methyl group or an isopropyl group. (This compound is described in WO2003315519, and describes insecticidal activity and production method), and general formula (B) (chemical formula 2)

(This compound is described in JP-A-2001-342186, and describes the insecticidal activity and the production method).

  Preferred insecticides that can be added are carbosulfan, benfuracarb, cartap, bensultap, imidacloprid, clothianidin, dinotefuran, thiacloprid, thiamethoxam, fipronil, ethiprole, spinosad, pymetrozine, and general formula (A) (Chemical Formula 3)

[Wherein R11 represents a methyl group or a chloro group, R12 represents a methyl group, a chloro group, a bromo group or a cyano group, R13 represents a chloro group, a bromo group, a trifluoromethyl group or a cyanomethoxy group, Represents a methyl group or an isopropyl group. (This compound is described in WO2003315519 and describes the insecticidal activity and production method), and the general formula (B) (formula 4)

(This compound is described in JP-A-2001-342186, and describes insecticidal activity and production method).

  Examples of fungicides that can be added are tifluzamide, flutolanil, mepronil, pencyclon, carpropamide, diclocimet, tricyclazole, pyroxylone, phenoxanyl, fusalide, azoxystrobin, metminostrobin, orisatrobin, kasugamycin, validamycin, teclophthalam, oxytetracycline, streptomycin, streptomycin, , Cimeconazole, furametopyl, copper, thiophanate methyl, EDDP, IBP, metalaxyl, iprodione, hydroxyisoxazole, oxolinic acid, prohexadione calcium salt, (RS) -N- [2- (1,3-dimethylbutyl) thiophene 3-yl] -1-methyl-3-trifluoromethyl-1H-pyrazole-4-carboxamide (generic name pending) Penthiopyrad), Jikuromejin, iminoctadine acetate, isoprothiolane, tiadinil, probenazole, a acibenzolar S-methyl.

  In the sustained-release granules used in the present invention, the thermoplastic material to be coated is the same material as the thermoplastic material used for the core granule, but its melting point is from the viewpoint of workability. It is preferably lower than the thermoplastic material used in the core granulated product. The specific melting point is preferably selected in the range of 40 to 70 ° C, preferably 50 to 69 ° C, more preferably 60 to 68 ° C. The thermoplastic material to be coated is preferably a material having a low melt viscosity from the viewpoint of workability. Specific examples of such thermoplastic materials include plant waxes such as candelilla wax and tree wax, animal waxes such as beeswax, lanolin, whale wax, and beef tallow, paraffin wax, petroleum waxes such as petrolatum, and Fischer-Tropsch wax. Examples thereof include modified hydrocarbons such as synthetic hydrocarbons and paraffin wax derivatives. Among these, paraffin wax is particularly preferable, and manufactured by Nippon Seiwa Co., Ltd., trade name paraffin wax 140, melting point: 61 ° C. or trade name SP-0145, melting point: 63 ° C., trade name paraffin wax 150, melting point: 66 ° C. Etc. can be exemplified.

  In the sustained-release granules used in the present invention, a surfactant and / or a water-soluble polymer may be added to the thermoplastic material to be coated as long as the object and effect of the present invention are not impaired. . In addition to the surfactant and the water-soluble polymer, an auxiliary agent and an inorganic diluent carrier can be contained.

  In the sustained-release granules of the present invention, the surfactants that can be added to the thermoplastic material to be coated include nonionic surfactants, anionic surfactants, and cationic surfactants that are commonly used in agricultural chemical formulations. Surfactants and amphoteric surfactants can be mentioned. For example, alkyl ether, polyoxyethylene alkyl aryl ether, polyoxyethylene styryl phenyl ether, polyoxyethylene alkyl ester, polyoxyethylene sorbitan alkylate, polyoxyethylene phenyl ether polymer, polyoxyethylene alkylene aryl phenyl ether, polyoxyethylene Nonionic surfactants such as alkylene glycol, polyoxyethylene polyoxypropylene block polymer, lignin sulfonate, alkyl aryl sulfonate, dialkyl sulfo succinate, polyoxyethylene alkyl aryl ether sulfate, alkyl naphthalene sulfonate, Anionic surfactants such as polyoxyethylene styryl phenyl ether sulfate, alkyl Amine salts, quaternary ammonium salts, alkyl betaines, cationic surfactants and amphoteric surfactants such as an amine oxide. When these surfactants are added, one type may be used, but the same type or different types may be used in combination.

  Examples of water-soluble polymers that can be added to the thermoplastic material to be coated in the sustained-release granules used in the present invention include synthetic polymers such as acrylic polymers, vinyl polymers, and polyoxyalkylenes. , Semi-synthetic polymers such as cellulose derivatives, modified starches, and lignin derivatives, and natural polymers. More specifically, examples of the acrylic polymer include polyacrylic acid soda and polysodium methacrylate, and examples of the vinyl polymer include polyvinyl alcohol, polyvinyl pyrrolidone, vinyl acetate copolymer, and polyoxyalkylene. Examples thereof include polyoxyethylene and polyoxypropylene. Furthermore, examples of the cellulose derivative include sodium carboxymethylcellulose, dextrin, hydroxypropylmethylcellulose, methylcellulose, methylethylcellulose, hydroxypropylcellulose, etc., and modified starches include modified starch, carboxymethyl starch, soluble starch, etc., and lignin derivatives. Examples thereof include sodium lignin sulfonate. On the other hand, typical examples of natural polymers include polysaccharides such as gum arabic, xanthan gum, gum tragacanth, guar gum, carrageenan, alginic acid and sodium alginate, and proteins such as casein, gelatin and collagen. Among the water-soluble polymers exemplified above, it is particularly preferable to use sodium polyacrylate, polyvinyl alcohol, sodium carboxymethylcellulose, and xanthan gum, and the molecular weight is usually in the range of 5000 to 5000000, preferably 10,000 to 3000000. It is more preferable to select one.

In the sustained-release granules used in the present invention, the inorganic diluent carrier that can be added to the thermoplastic material to be coated is not particularly limited. For example, clay, silica stone, talc, bentonite, calcium carbonate , Pumice, diatomaceous earth, vermiculite, pearlite, attapulgite, amorphous hydrous silicic acid, commonly known as white carbon, and so on. .
Further, the thermoplastic material to be coated in the sustained-release granule of the present invention also includes an antioxidant, an ultraviolet absorber, an antistatic agent, an aromatic carboxylic acid, a polyvalent carboxylic acid, a sugar as an auxiliary agent. Solid organic acids such as derivatized carboxylic acids can also be added. As the antioxidant, the ultraviolet absorber, and the antistatic agent, those exemplified above as those that can be added to the granulated product can be used. On the other hand, specific examples of organic acids that can be used as adjuvants include dibasic acids such as succinic acid, malonic acid, succinic acid, maleic acid and fumaric acid, or hydroxy-substituted dibasic acids such as malic acid and tartaric acid, ascorbic acid And sugar-derived carboxylic acids such as citric acid.

  The total amount of surfactant, water-soluble polymer, inorganic diluent carrier and auxiliary agent added to the thermoplastic material to be coated is based on the total weight of the sustained-release granules. Usually, 0.01% by mass to 70% by mass, preferably 0.01% by mass to 60% by mass, more preferably 0.01% by mass to 40% by mass, more preferably 0.01% by mass to 20% by mass. More preferably, it selects from the range of 0.01 mass%-10 mass%.

  According to the method of the present invention, Coleopterous insects such as rice weevil, rice weevil, and rice beetle, Diptera pests such as rice scallop, rice leaf moth, rice leaf moth, rice leaf moth, leaf moth, green leafhopper, Hemiptera pests such as black stink bugs, Lepidoptera such as Coleoptera, Nika Meichu, Sankameichu, Inetome, Futaobioyaga, Lepidoptera, Ayayotou, Akinawawa, Azamuma pests such as Rice thrips, Naples Can be prevented. In particular, spotted rice stink bugs that are problematic after the heading season include the brown glaze turtle, spotted beetle turtle, sand squirrel turtle, red spotted turtle, yellow squirrel turtle, red squirrel turtle, wheat squirrel turtle, red squirrel turtle, red stag beetle, red stag beetle Ginkgostomidae, such as Midori-kasameme, Medakaana-chomushi, such as Medakaanamekamemushi, Himehiratanagamemushi, Monshirogaragamushi, Ushiroshiroherinagamemushi, Shiroheragarashimushi, Amurshirohamekamemushi, Minakamisameka Hornbill bug, yellow-bellied goblet bug, flat-headed goblet bug, sabi leopard bark bug, bearded bug, hornbill Agaricidae such as Aedes aegypti, Spotted agaricidae, Naganomemidae such as Gotaneenagamemushi, Hoshimokumushi such as Futamon Hoshikamemushi, Azuki beetle, Hemikamemushi, Harikamemushi, Hoshiharamemushi Sphagnum Helicidae, Spider Hela beetle, Thai Spider Hela beetle, Hosoheli, etc. Stink bug, quail stink bug, bark beetle, spotted stink bug, spotted beetle, spotted stink bug, spotted stink bug, marsilah stink bug, beetle stink bug, bark beetle, stink bug Hoshikamemushi, brown marmorated stink bug, Inekamemushi, garnishing Giro bugs, order Hemiptera, Southern Blue stink bug, Ezo Blue stink bugs, beet bug, can prevent Plautia crossota green bug, red bugs, damage such as rice black bugs.

  If necessary, by adding an insecticide and / or fungicide to the thermoplastic material to be coated, in addition to the above, pests, rice blast, leaf blight, sesame leaf blight, It can control paddy rice diseases such as white leaf blight.

  The application method to the seedling box in the method of the present invention can be any of the seedling culture soil admixing treatment, the sowing treatment, the greening treatment, and the treatment on the day from 3 days before transplantation. Although there is no restriction | limiting in particular in the processing amount of the sustained release granule in each of these processing methods, About 20-150g per normal rice seedling raising box (about 30 cm x about 60 cm) is preferable. The method of the present invention can be used irrespective of the kind of seedling culture soil, the rice varieties and whether or not the rice is genetically modified, and is used to control infectious diseases and diseases transmitted from the seedling culture soil. You may combine with control by other methods, such as seed treatment or seedling treatment, Honda treatment by other preparations, biological control, or physical control. In addition, there is no problem in using the present invention in normal paddy rice cultivation, such as combining weed control and fertilization with a herbicide generally performed in paddy rice cultivation.

  Next, the present invention will be described more specifically with reference to examples. These examples are examples of the best mode of the present invention, but the present invention is not limited to these examples. In the specific examples described below, examples of application to a seedling box granule for paddy rice and a method for preparing the same will be given, but the formulation of the resulting preparation is not limited in any way. In addition, all the mixture ratios shown by specific examples, such as an Example mentioned below, shall be mass%.

Formulation Example 1
Floating mixer with 12% by weight of dinotefuran, 18% by weight of montanic ester wax (trade name Luwax E, manufactured by BASF), 10% by weight of talc, 58% by weight of calcium carbonate, and 2% by weight of white carbon. The mixture was heated to 83 ° C. and mixed. This mixture was extruded and granulated using a horizontal extrusion granulator (aperture 0.8 mm) maintained at 90 ° C. with a heating device, and then crushed and sieved to obtain a granulated product (core agent).
67% by mass of the obtained granulated product (core agent) was placed in a floating mixer equipped with a heating device and mixed while heating to 70 ° C., and paraffin wax (Nippon Seiki Co., Ltd.) was used as the raw material powder for the outer layer. ), Trade name: Paraffin wax 150) Granules containing 8% dinotefuran with 4% by mass, 7% by mass of clay, and 22% by mass of calcium carbonate mixed quantitatively and having a core coated with the outer layer part (Preparation 1) was obtained.

Formulation Example 2
Floating mixer with 15% by weight of dinotefuran, 18% by weight of montanic acid ester wax (trade name Luwax E, manufactured by BASF), 10% by weight of talc, 55% by weight of calcium carbonate, and 2% by weight of white carbon. The mixture was heated to 83 ° C. and mixed. This mixture was extruded and granulated using a horizontal extrusion granulator (aperture 0.8 mm) maintained at 90 ° C. with a heating device, and then crushed and sieved to obtain a granulated product (core agent).
67% by mass of the obtained granulated product (core agent) was placed in a floating mixer equipped with a heating device and mixed while heating to 70 ° C., and paraffin wax (Nippon Seiki Co., Ltd.) was used as the raw material powder for the outer layer. ), Trade name Paraffin wax 150) Granules containing 10% dinotefuran with 4% by mass, 7% by mass of clay and 22% by mass of calcium carbonate mixed quantitatively and having a core coated with the outer layer part (Preparation 2) was obtained.

Formulation Example 3
Floating mixer with 18% by weight of dinotefuran, 18% by weight of montanic acid ester wax (trade name Luwax E, manufactured by BASF), 10% by weight of talc, 52% by weight of calcium carbonate, and 2% by weight of white carbon. The mixture was heated to 83 ° C. and mixed. This mixture was extruded and granulated using a horizontal extrusion granulator (aperture 0.8 mm) maintained at 90 ° C. with a heating device, and then crushed and sieved to obtain a granulated product (core agent).
67% by mass of the obtained granulated product (core agent) was placed in a floating mixer equipped with a heating device and mixed while heating to 70 ° C., and paraffin wax (Nippon Seiki Co., Ltd.) was used as the raw material powder for the outer layer. ), Trade name Paraffin wax 150) Granules containing 12% dinotefuran with 4% by mass, 7% by mass of clay, and 22% by mass of calcium carbonate mixed quantitatively and coated with an outer layer on the core. (Preparation 3) was obtained.

Formulation Example 4
Floating mixer with 15% by weight of dinotefuran, 18% by weight of montanic acid ester wax (trade name Luwax E, manufactured by BASF), 10% by weight of talc, 55% by weight of calcium carbonate, and 2% by weight of white carbon. The mixture was heated to 83 ° C. and mixed. This mixture was extruded and granulated using a horizontal extrusion granulator (aperture 0.8 mm) maintained at 90 ° C. with a heating device, and then crushed and sieved to obtain a granulated product (core agent).
67% by mass of the resulting granulated product (core agent) was placed in a floating mixer equipped with a heating device and mixed while heating to 70 ° C., and 24% by mass of propenazole as a raw material powder for the outer layer, paraffin wax (Nippon Seiki Co., Ltd., trade name paraffin wax 150) 4% by mass and powder mixed with 5% by mass of calcium carbonate are quantitatively added, dinotefuran is 10% for the core, and propenazole is 24% for the outer layer. % Granule (formulation 4) was obtained.

Test example 1
Pest control effect on stink bugs in seedling box treatment in the field Emergence of pests: Akasjikasumikame, Akahigehosomirikasikameka, Makibakasumikame District system: 1 district 3a (10m x 30m) 1 repetitive system Test method: Rice in seedling box 2.4g of the granules prepared in Formulation 1 were sprayed around the seedling box on the surface of the plant soil of the 2.4 leaf stage seedlings, and transplanted using a rice planting machine. From 7 days after heading, picking was carried out about every other week (twice times: 2 places in the ward). As a control agent, Dantotsu H powder DL and Starkle powder DL were used, and a predetermined amount was sprayed using a pipe duster 7 days after heading. 100 to 150 ears (two repetitions) were randomly extracted from the ward within 137 days after planting (treatment) (at the time of harvest), and spotted rice was examined.
As shown in Table 1, various stink bugs were observed up to 29 days after heading. On the other hand, as shown in Table 2, Formulation 1 suppressed the occurrence of speckled rice as much as or more than the comparative powder sprayed 7 days after heading.

Test example 2
Control effect on paddy rice pests in seedling box treatment in the field Emergence of pests: Rice weevil, rice drab beetle, rice leafhopper
Red bearded winged turtle (shaded release)
Ward system: 1 ward 1a (5m x 20m) 1 repetitive system Test method: Rice (Akitakomachi) in the seedling box 2.3 Leaves of the seedling of the leaf stage seedlings The granules prepared with the above preparations 1, 2, and 3 are raised 50g was sprayed around the box and transplanted using a rice planting machine.
Survey method:
○ Rice weevil, rice beetle Planting (treatment) From 11 days later, the number of adult larvae parasitizing 100 strains along the shore was investigated. At the same time, the degree of leaf damage was investigated. Sixty strains were excavated per ward 60 days after the treatment, and the number of larvae and pupae parasitic on the root were counted.
Okahigehosomidikarikamikame A net room was set up to cover 10 strains in the test area (3 rooms / district), and 6 adults of the redheaded beetle were released after 6 and 13 days after heading. All the spikes in the net room were collected at the time of harvest and spotted rice was investigated.
As shown in Table 3, up to 62 days after transplantation during the study period, the control effect was shown on rice weevil and rice drought beetle as compared with the case of no treatment. Moreover, when the density of the rice weevil larvae by excavation of the strain as shown in Table 4 was investigated, almost no larvae were observed, and a high control effect was shown against untreated.
Furthermore, as shown in Table 5, preparations 1 to 3 were confirmed to have a high speckled rice inhibitory effect against untreated in the Akahigehosomidorikasikameka release test 6 and 13 days after heading.

Claims (7)

  (RS) -1-methyl-2-nitro-3- (3-tetrahydrofurylmethyl) guanidine (generic name dinotefuran) or 3- (2-chloro-1,3-thiazol-5-ylmethyl) -5-methyl- 1,3,5-oxadiazinan-4-ylidene (nitro) amine (generic name: thiamethoxam) is an active ingredient, and the core granule containing a thermoplastic material that is sparingly soluble in water is hardly soluble in water. A method for preventing paddy rice disease and / or pest damage from seeding to harvest, characterized by applying a sustained-release granule coated with a thermoplastic material to a paddy rice seedling box.   The method according to claim 1, wherein the thermoplastic material contained in the core granule is a montanic acid wax and / or a montanic acid ester wax.   The method according to claim 1 or 2, wherein an insecticide and / or a bactericidal agent is contained in the thermoplastic material for coating the core granule. Insecticides are isoxathione, chlorpyrifosmethyl, dimethylvinphos, diazinon, pyridafenthione, propaphos, marathon, EPN, DEP, PAP, MIPC, MPP, MEP, carbosulfan, thiodicarb, benfuracarb, XMC, carbofuran, BPC, NAC, cyclo Protoline, silafluophene, etofenprox, cartap, thiocyclam, bensultap, dinotefuran, imidacloprid, clothianidin, dinotefuran, thiacloprid, thiamethoxam, nitenpyram, chromafenozide, tebufenozide, methoxyphenozide, fipronil, protiprinosulfide, protiprinosulfate Moreover, general formula (A) (chemical formula 1)

[Wherein R11 represents a methyl group or a chloro group, R12 represents a methyl group, a chloro group, a bromo group or a cyano group, R13 represents a chloro group, a bromo group, a trifluoromethyl group or a cyanomethoxy group, Represents a methyl group or an isopropyl group. And a compound represented by the general formula (B)

Selected from the group consisting of compounds represented by:
Bactericides such as tifluzamide, flutolanil, mepronil, pencyclon, carpropamide, diclocimet, tricyclazole, pyroxylone, phenoxanyl, fusaride, azoxystrobin, metminostrobin, orisatrobin, kasugamycin, validamycin, teclophthalam, oxytetracycline, streptomycin, ferimzonol, Furametopyr, copper, thiophanate methyl, EDDP, IBP, metalaxyl, iprodione, hydroxyisoxazole, oxolinic acid, prohexadione calcium salt, (RS) -N- [2- (1,3-dimethylbutyl) thiophen-3-yl ] -1-Methyl-3-trifluoromethyl-1H-pyrazole-4-carboxamide (generic name pending: penthiopyrad) 4. The method of claim 3, wherein said method is selected from the group consisting of: dichromedin, iminoctazine acetate, isoprothiolane, thiazinyl, probenazole, and acibenzoral S-methyl. Insecticides include carbosulfan, benfuracarb, cartap, bensultap, imidacloprid, clothianidin, dinotefuran, thiacloprid, thiamethoxam, fipronil, ethiprole, spinosad, pymetrozine, and general formula (A)

[Wherein R11 represents a methyl group or a chloro group, R12 represents a methyl group, a chloro group, a bromo group or a cyano group, R13 represents a chloro group, a bromo group, a trifluoromethyl group or a cyanomethoxy group, Represents a methyl group or an isopropyl group. And a compound represented by the general formula (B)

Selected from the group consisting of compounds represented by:
5. The method according to claim 4, wherein the bactericidal agent is selected from the group consisting of tifluzamide, carpropamide, diclocimet, tricyclazole, pyroxylone, azoxystrobin, orisatrobin, furametopyl, isoprothiolane, thiazinyl, probenazole, and acibenzoral S-methyl.   The method according to any one of claims 1 to 5, wherein the application method to the seedling box is a seedling culture soil admixing treatment, a sowing time treatment, a greening season treatment, and a treatment on the day from 3 days before transplantation.   The method according to any one of claims 1 to 6, wherein the pest damage is spotted rice damage caused by stink bugs.