JP2008088058A - Method for controlling damage of paddy rice by paddy rice sap-sucking stinkbugs - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for controlling the damages of paddy rice by paddy rice sap-sucking stinkbugs, by which the damages of the paddy rice by the paddy rice sap-sucking stinkbugs can stably be controlled without relating to a weather condition comprising the presence or absence of rainfall. <P>SOLUTION: This method for controlling the damages of paddy rice by the paddy rice sap-sucking stinkbugs is characterized by having a process for directly once applying a rainfall-resistant sustained release agrochemical formulation to the water surface of rice paddy during a period after the transplantation of paddy rice and before the heading of the paddy rice. The rainfall-resistant sustained release agrochemical formulation is prepared by film-coating a core material comprising a permeably migrational insecticidal neonicotinoid compound as an active ingredient and a solid carrier with a thermosetting or thermoplastic polymer produced by polymerizing or polycondensing a low molecular compound at a coating rate (the rate of the weight of the coating material to the weight of the core material) of 1 to 20%. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a method for suppressing damage to paddy rice by paddy rice absorbable stink bugs.

In recent years, paddy rice damage such as spotted rice has become serious in the field of paddy rice. For this reason, a sustained-release agrochemical formulation in which a core material containing an agrochemical active ingredient such as various neonicotinoid compounds is coated with a film material such as rubber or wax is applied to a seedling box before transplanting rice seedlings. A method has been proposed that can be applied to paddy rice seedling soil so that it can control paddy rice pests that occur from the early paddy field to the post-heading period with a single chemical treatment prior to rice planting (for example, Patent Document 1).
In addition, in the form of a solid preparation packed with granules such as various neonicotinoid compounds, jumbo agents, granule wettable powders, granule water solvents or water-soluble films thereof, rice paddies 30 days before heading and 20 days after heading A method has been proposed in which the production of spotted rice by stink bugs can be effectively suppressed by applying directly to the water surface of a paddy field during the period (see, for example, Patent Document 2).

JP2004-43436 JP2005-213270

However, in the former method, there are many elements that are different from the technique of applying directly to the water surface of the paddy field (hereinafter sometimes referred to as water surface application) because the drug is applied to the seedling box before planting the rice. In particular, there are many methods such as selection of core material and membrane coating suitable for water surface application, which is a different application method from nursery box application, selection of coverage, selection of application time and frequency, and selection of active ingredients. Finding an appropriate combination of each element selected from the selection items is a new important issue.
On the other hand, in the latter method, it is customary to apply the drug after the heading period in which harm by stink bugs becomes a problem, but in some cases, the drug may be applied before the heading period. However, with the conventional agrochemical formulation used in the method, the earlier the application time, the more it will overlap with the rainy season for a long period of several weeks immediately after the drug application, so the efficacy is insufficient due to the weather. May occur.
By the way, in the technique of applying the pesticidal active ingredient directly to the water surface of the paddy field, in the case of the pesticidal active ingredient having osmotic transferability, the pesticidal active ingredient introduced into the water is absorbed from the root part or foliage part of the plant, It moves to a leaf part or a panicle, and this is considered to show insecticidal activity against a sucking stink bug. For this reason, it has been said that this technique is less susceptible to weather and the like as compared to normal foliage spraying. However, as the technology is widely used, in the actual use situation, fluctuations in efficacy may be a problem even in the technology of applying agrochemical active ingredients directly to the surface of paddy fields. As a result, in the case of weather conditions that overlap with the rainy season for a long period of several weeks immediately after the application of the drug, the effect fluctuation becomes large, and the phenomenon that the efficacy of the agrochemical active ingredient becomes insufficient It has become clear that it can also be seen.
Here, the lack of effectiveness from the weather that overlaps with the rainy season does not mean the adverse effect of overflow from the paddy rice field due to so-called rain, but the adverse effect caused by exposure of paddy rice to rain due to rain Means.

As a result of intensive studies under such circumstances, the present inventors have found a method that can stably suppress paddy rice damage caused by paddy rice-absorbing stink bugs regardless of the weather conditions with or without rainfall, and the present invention. It came.
That is, the present invention
1. Thermosetting formed by polymerizing or condensing a low molecular weight compound comprising a core material containing an insecticidal neonicotinoid compound (hereinafter sometimes referred to as the present compound) having osmotic transfer properties as an active ingredient and a solid carrier. Alternatively, it is a rain-resistant sustained release film that is usually coated with a thermoplastic polymer material at a coating rate of 1 to 20%, preferably a coating rate of 2 to 20% (ratio of the coating material weight to the core material weight). It is characterized by having a step of directly applying a pesticide preparation (hereinafter sometimes referred to as this sustained release pesticide preparation) directly to the water surface of a paddy field during the period from transplanting rice to before heading. Method for suppressing paddy rice damage by paddy rice sucking stink bugs (hereinafter sometimes referred to as the method of the present invention);
2. 2. The paddy rice according to item 1 above, wherein the active ingredient is methyl} -3-methyl-2-nitroguanidine substituted with 1-{(5-membered heterocycle optionally having halogen atom)} Method for controlling rice damage caused by sucking stink bugs;
3. The active ingredient is 1- (2-chloro-1,3-thiazol-5-ylmethyl) -3-methyl-2-nitroguanidine and / or 1- (tetrahydro-3-furylmethyl) -3-methyl-2- The method for suppressing paddy rice damage by paddy rice stink bugs according to the preceding item 1, which is nitroguanidine;
4). The method for suppressing damage to paddy rice by the paddy rice-absorbing stink bug according to any one of the preceding items 1 to 3, wherein the solid carrier is a fine powder substance of 2 to 30 µm;
5. The method for suppressing damage to paddy rice by the rice-absorbing stink bugs according to any one of the preceding items, wherein the damage to paddy rice is the occurrence of spotted rice;
Etc. are provided.

  According to the method of the present invention, it is possible to stably suppress damage to paddy rice caused by paddy rice sucking stink bugs regardless of the weather conditions with or without rainfall.

  As described above, the method of the present invention is a thermosetting or heat-forming material obtained by polymerizing or condensing a low-molecular compound in a core material containing an insecticidal neonicotinoid compound having osmotic transferability as an active ingredient and a solid carrier. Rain-resistant sustained release formed by coating with a polymer material having a plasticity, usually with a coverage of 1 to 20%, preferably a coverage of 2 to 10% (ratio of the weight of the coating material to the weight of the core material) It is a method for suppressing damage to paddy rice by paddy rice-absorbing stink bugs, which comprises a step of directly applying the agrochemical preparation to the water surface of the paddy field during the period from transplanting rice to before heading.

  The “insecticidal neonicotinoid compound having osmotic migration” (that is, the present compound) used as an active ingredient in the method of the present invention is, for example, a plant in which an active compound as an active ingredient is absorbed from the roots and foliage of plants. If the pest sucks or eats the stems and leaves of the pest, the action of causing the pest to die or even if it does not completely lead to death, the pest actively sucks the juice (especially for the ear) It is a compound having a neonicotinoid structure that has a blocking action. Specifically, for example, imidacloprid, 3- (2-chlorothiazol-5-ylmethyl) -5-methyl-1,3,5-oxadiazinan-4-ylidene-N- (nitro) amine (generic name: thiamethoxam), (RS) -1-methyl-2-nitro-3-[(3-tetrahydrofuryl) methyl] guanidine (generic name: 1- (tetrahydro-3-furylmethyl) -3-methyl-2-nitroguanidine), ( E) -1- (2-Chloro-1,3-thiazol-5-ylmethyl) -3-methyl-2-nitroguanidine (generic name: 1- (2-chloro-1,3-thiazol-5-ylmethyl) Nitroimino compounds such as -3-methyl-2-nitroguanidine), nitromethylene compounds such as nitenpyram, acetamiprid, N- [3- (6-chloropyridine- - ylmethyl) thiazolidine-2-ylidene] cyanamide (common name: thiacloprid) known compounds such cyanoimino-based compounds and the like.

  Among the “insecticidal neonicotinoid compounds having osmotic migration” (that is, the present compound) used as an active ingredient in the method of the present invention, for example, 1-{(5-membered heterocycle optionally having a halogen atom) Preferred examples include methyl} -3-methyl-2-nitroguanidine and the like which are substituted by (1). As used herein, “methyl substituted with a 5-membered hetero ring optionally having halogen atom” includes, for example, methyl substituted with a furan ring optionally having halogen atom and halogen atom. Examples thereof include methyl substituted with an optional thiazole ring. Specific examples include 2-chloro-1,3-thiazol-5-ylmethyl, tetrahydro-3-furylmethyl and the like. These compounds can be produced according to the production methods described in, for example, JP-A-3-157308 and JP-A-7-179448.

The method of the present invention has an effect of suppressing paddy rice damage caused by paddy rice sucking stink bugs, and examples of the paddy rice sucking stink bugs that show the effect of the method of the present invention include the following insects.
Japanese spider helicopter, spider helicopter, Thai spider helicoptercidae, Hosohelikamushi, etc. , Chailonga, bug, bug, bug Leopard nest bug, Sabi leopard nest bug, beetle bug Paramecidae such as Musi, Madaranakamemushi, Kinkamemidae such as Chairokamemushi, Medakabakamemidae such as Medakabakamemushi, Akahigehosomidikasikame, Akasujikasomikame, Mugikasmikame, Akahoshikasukamikamekameka, Akahosukakamikamikakamekamekamekamekamekameka Helicopter such as Red-tailed beetle, Red-tailed beetle, Red-tailed beetle, Red-tailed beetle, Red-backed beetle, Red-backed beetle, Red-tailed beetle Stink bug, spruce beetle, kebukahimeherikamushi, buchihiheramememushi, etc., dwarf beetles such as phthamon beetle, shrimp beetle, Namia stink bug, quail stink bug, shrimp stink bug, spotted beetle, spotted stink bug, spotted beetle, spotted beetle, spotted stink bug, red stink bug, bark beetle stink bug , And stink bugs such as larvae, Aokusakamemushi, Ezoaokamemushi, Chabanaeokamemushi, Inakurokamemushi, Iwasakikamemushi.

  The method of the present invention has an effect of suppressing paddy rice damage caused by paddy rice sucking stink bugs, but does not cause phytotoxicity that poses a problem for paddy rice. As described above, the active compound, which is an active ingredient, is absorbed from the roots and stems and leaves of the plant and transferred to other parts of the plant, and the pests absorb the pests by sucking or eating the stems and leaves. Even if it does not lead to death or complete death, it has the action of blocking active soup by pests (especially soup for the ears), so it is possible to suppress the occurrence of spotted rice.

  The method of the present invention can also be used with other insecticides, nematicides, acaricides, fungicides, herbicides, plant growth regulators and the like.

“The sustained-release agrochemical formulation” used in the method of the present invention is a low molecular weight core material containing an insecticidal neonicotinoid compound (ie, the present compound) having osmotic transferability as an active ingredient and a solid carrier. Rain-resistant sustained-release agricultural chemicals that are coated with a film at a coverage of 1 to 20% (ratio of the weight of the coating material to the weight of the core material) by a polymer material that is polymerized or condensed by thermosetting or thermoplasticity. It is a formulation.
The sustained-release pesticide preparation contains active ingredients of other pesticides as necessary, for example, cartap hydrochloride, bensultap, spinosad, emamectin benzoate, fulvendiamide, indoxacarb, orisatrobin, isoprothiolane, flutolanil, azoxy Strobin, probenazole, flametopir, tifluzamide, validamycin, pyroxylone, metminostrobin, IBP, fusalide, kasugamycin, carpropamide, dichromedin, tricyclazole, pencyclone, polyoxin, mepronil, EDDP may be included. The active ingredient preferably has osmotic transferability.

  This sustained-release agricultural chemical preparation comprises particles in which a core material is coated with a coating film. Here, the “core material” is a granular structure containing an agrochemical active ingredient and a solid carrier, and the coating film is a film-like structure (or multilayer structure) that three-dimensionally surrounds the core material. is there. That is, the sustained-release agricultural chemical preparation is a granule containing particles composed of a core material and a coating film, and may be composed only of the particles, or achieves the object of the present invention. Depending on its use, other agents such as other sustained-release agricultural chemical formulations, granular fertilizer, granular soil, granular plant nutrient, granular plant preparation control agent, granular hormone agent, seeds, etc. It may be contained. Unless otherwise specified, in this specification, when the contents of the core material, coating film, agricultural chemical active ingredient, and solid carrier are described, "Or" ... content in the sustained-release agrochemical formulation "is a value expressed as an average of the contents in the particles based on the average of the particles composed of the core material and the coating film. Means.

  The content of the core material in the sustained-release agricultural chemical preparation is usually 83 to 99% by weight, preferably 90 to 98% by weight. The core material is a granular material containing an agrochemical active ingredient and a solid carrier, and may have a uniform structure as a whole, or the constituent components are unevenly distributed, for example, a multilayer structure. It may be what you are.

  One kind of the agricultural chemical active ingredient may be contained in the particles composed of the core material and the coating film, or two or more kinds thereof may be contained. The content of the pesticidal active ingredient is usually 0.1 to 90% by weight, preferably 0.2 to 70% by weight in the sustained-release pesticidal formulation. The agrochemical active ingredient may be dispersed throughout the core material, or may be localized in the core material or on the surface of the core material.

Examples of the solid carrier in the present invention include a mineral carrier, a vegetable carrier, and a synthetic carrier.
Examples of mineral carriers include kaolin minerals such as kaolinite, dickanite, nacrite, and halosite, serpentine such as chrysotile, lizarite, anticorite, and amesite, montmorillonite minerals such as sodium montmorillonite, calcium montmorillonite, and magnesium montmorillonite. Smectite such as saponite, hectorite, soconite, and hydelite, pyrophyllite, talc, wax, mica such as muscovite, fengite, sericite, illite, silica such as cristobalite, quartz, hydrous magnesium silicate such as attapulgite, sepiolite , Calcium carbonate such as dolomite, calcium carbonate fine powder, sulfate minerals such as gypsum, gypsum, zeolite, zeolite, tuff, vermiculite, laponite, pumice Diatomaceous earth, acid clay, activated clay and the like.
Examples of the vegetable carrier include cellulose, rice husk, wheat flour, wood flour, starch, rice bran, bran, soybean flour and the like. Examples of the synthetic carrier include wet method silica, dry method silica, a fired product of wet method silica, surface-modified silica, and modified starch (such as Pine Flow manufactured by Matsutani Chemical).

  The solid carrier is usually contained in the sustained-release agricultural chemical preparation in an amount of 0.5 to 98.9% by weight, preferably 25 to 97.8% by weight. In the present invention, among these solid carriers, those having a low oil absorption capacity, specifically, a solid carrier having an oil absorption capacity of 50 or less is preferably used, and a solid support having 30 or less is more preferably used. Examples of such a suitable solid carrier include kaolin (oil absorption capacity 32 to 45), talc (oil absorption capacity 30 to 50), calcium carbonate (oil absorption capacity 16 to 30) and the like, among which calcium carbonate is particularly preferable. . The oil absorption capacity of the solid carrier can be measured by the method described in JIS K-5101.

  The average particle diameter of the solid support is usually 100 μm or less, and a fine powder solid support having an average particle diameter of 2 to 30 μm is preferable from the viewpoint of low oil absorption. In addition, when producing a core material by extrusion granulation method, it is preferable to use montmorillonite mineral as a solid carrier because it can reduce damage to the extrusion net during granulation, and montmorillonite mineral and other fine powder solid carrier are used in combination. More preferably. When the montmorillonite mineral is used in combination with another solid carrier, the content of the montmorillonite mineral is usually 2.5 to 30% by weight, preferably 5 to 20% by weight, and the total amount of the solid carrier is usually 0. 0.5-98.9% by weight, preferably 25-97.8% by weight.

  The core material in this sustained-release agrochemical formulation contains an agrochemical active ingredient and a solid carrier, but if necessary, a binder, a water-soluble substance, a surfactant, a solvent, a stabilizer, a colorant. And may contain a fragrance or the like.

  Examples of binders that can be used in the sustained-release agrochemical formulation include synthetic polymers such as acrylic polymers, vinyl polymers, polyoxyalkylene, semi-synthetic polymers such as cellulose derivatives, modified starches, and lignin derivatives. Examples include molecules and natural polymers. Examples of the acrylic polymer include sodium polyacrylate and sodium polymethacrylate, and examples of the vinyl polymer include polyvinyl alcohol, polyvinyl pyrrolidone, and vinyl acetate copolymer. Examples of polyoxyalkylene include polyoxyethylene and polyoxypropylene.

  Examples of the cellulose derivative include sodium carboxymethylcellulose, dextrin, hydroxypropylmethylcellulose, methylcellulose, methylethylcellulose, hydroxypropylcellulose, and the like. Examples of the modified starch include modified starch, carboxymethyl starch, and soluble starch. Examples of lignin derivatives include sodium lignin sulfonate. Examples of the natural polymer include polysaccharides such as gum arabic, xanthan gum, tragacanth gum, guar gum, carrageenan, alginic acid and sodium alginate, and proteins such as casein, casein lime, gelatin and collagen. Preferably, polyvinyl alcohol, sodium carboxymethyl cellulose, and sodium lignin sulfonate are used.

  The content of the binder is usually 0.1 to 10% by weight, preferably 0.5 to 5% by weight in the sustained release agricultural chemical preparation. Although the molecular weight of a binder is not specifically limited, Usually, 5000-300000, Preferably it is 10000-50000. Moreover, as a binder, the thing of the viscosity of 3-30 centipoise of 4% aqueous solution in 20 degreeC is preferable.

  The water-soluble substance that can be used in the sustained-release agrochemical formulation is a water-soluble substance having a molecular weight of 50 to 700 and solid at room temperature (hereinafter referred to as the present water-soluble substance), and usually has a surface-active ability. Not done. Examples of the water-soluble substance include saccharides such as monosaccharides and oligosaccharides, urea, amino acids, oligopeptides, water-soluble organic substances such as solid organic acids and organic acid salts, and water-soluble inorganic substances such as solid inorganic salts. It is done.

Monosaccharides include tricarbons such as glyceraldehyde and dioxyacetone, tetracarbons such as threose and erythrulose, pentoses such as ribose, lyxose, and xylulose, glucose, mannose, galactose, fructose, sorbose, tagatose And the like, hexoses such as mannoheptose and sedoheptose, and derived monosaccharides such as sorbitol, mannitol and glucuronic acid. Examples of oligosaccharides include disaccharides such as cellobiose, trehalose, lactose and sucrose, trisaccharides such as maltotriose, and tetrasaccharides such as maltotetraose.
Examples of solid organic acids include cinnamic acid, crotonic acid, glycolic acid, benzoic acid, oxalic acid, malonic acid, succinic acid, glutaric acid, adipic acid, pimelic acid, maleic acid, fumaric acid, terephthalic acid, and the like. Acid salts include magnesium, calcium, sodium, potassium, lithium, iron, copper, zinc, nickel, aluminum, acetate, formate, propionate, butyrate, valerate, caproate, acrylic acid Salt, crotonate, cinnamate, glycolate, lactate, pyruvate, benzoate, oxalate, malonate, succinate, glutarate, adipate, pimelate, maleate Acid salts, fumarate salts, terephthalate salts, sulfonate salts and the like. Examples of amino acids include glycine, alanine, valine, leucine, isoleucine, phenylalanine, tyrosine, serine, threonine, cystine, methionine, aspartic acid, asparagine, glutamine, glutamic acid, lysine, arginine, histidine, tryptophan, proline and the like.
Solid inorganic salts include magnesium, calcium, sodium, potassium, lithium, iron, copper, zinc, nickel, aluminum, ammonium chloride, fluoride, bromide, iodide, sulfate, nitrate, phosphate, boric acid Examples include salts, carbonates, aluminates, and silicates.

  The content of the water-soluble substance is usually 4 to 50% by weight, preferably 8 to 30% by weight in the sustained release agricultural chemical preparation. Among the water-soluble substances, those having a water solubility at 20 ° C. of 10% or more are preferred, and those having a water solubility of 20% or more are more preferred. Specific examples of the water-soluble substance having a water solubility of 20% or more include sugars such as sucrose, glucose and dextrin, urea, calcium chloride, sodium hydrogen phosphate, sodium acetate, sodium nitrate, potassium carbonate, potassium pyrophosphate, nitric acid Examples thereof include metal salts such as magnesium, calcium nitrate and calcium chloride, and organic acids such as citric acid, among which saccharides, urea and metal salts are preferable, and urea and saccharides are more preferable. Furthermore, when the sustained-release agricultural chemical preparation is produced by extrusion granulation, it is particularly preferable in terms of productivity to use the water-soluble substance having good compatibility with the binder. The compatibility can be judged by whether or not the binder is precipitated or aggregated when the water-soluble substance is added to the aqueous solution of the binder. As an example, suitable water-soluble substances when polyvinyl alcohol is used as a binder include magnesium nitrate, calcium nitrate, calcium chloride, urea, citric acid, sucrose, and the like.

  Examples of the surfactant that can be used in the sustained-release agricultural chemical preparation include polyoxyethylene alkyl ether, polyoxyethylene alkyl aryl ether, polyoxyethylene lanolin alcohol, polyoxyethylene alkylphenol formalin condensate, polyoxyethylene sorbitan fatty acid. Esters, polyoxyethylene glyceryl mono fatty acid esters, polyoxypropylene glycol mono fatty acid esters, polyoxyethylene sorbitol fatty acid esters, polyoxyethylene castor oil derivatives, polyoxyethylene fatty acid esters, higher fatty acid glycerin esters, sorbitan fatty acid esters, sucrose fatty acids Ester, polyoxyethylene polyoxypropylene block polymer, polyoxyethylene fatty acid amide, alkylol Nonionic surfactants such as polyoxyethylene alkylamines; alkylamine hydrochlorides such as dodecylamine hydrochloride, dodecyltrimethylammonium salts, alkyldimethylbenzylammonium salts, alkylpyridinium salts, alkylisoquinolinium salts, dialkylmorpholines Cationic surfactants such as alkyl quaternary ammonium salts such as nium salts, benzethonium chloride and polyalkylvinylpyridinium salts; sodium fatty acids such as sodium palmitate, sodium ether carboxylates such as sodium polyoxyethylene lauryl ether carboxylate, lauroyl Higher amino acid condensates of higher fatty acids such as sodium sarcosine and sodium N-lauroyl glutamate, higher alkyl sulfonates, lauric acid ester sulfonates, etc. Fatty acid ester sulfonates, dialkyl sulfosuccinates such as dialkyl sulfosuccinates, higher fatty acid amide sulfonates such as oleic acid amide sulfonic acid, alkyl aryl sulfonates such as sodium dodecylbenzene sulfonate, diisopropyl naphthalene sulfonate , Formalin condensates of alkyl aryl sulfonates, higher alcohol sulfates such as pentadecane-2-sulfate, polyoxyethylene alkyl phosphates such as dipolyoxyethylene dodecyl ether phosphate, styrene-maleic acid copolymers, etc. Anionic surfactants of: N-laurylalanine, N, N, N-trimethylaminopropionic acid, N, N, N-trihydroxyethylaminopropionic acid, N-hexyleu N, N-dimethyla Examples include amphoteric surfactants such as minoacetic acid, 1- (2-carboxyethyl) pyrimidinium betaine, and lecithin.

  The content of the surfactant is usually 0.1 to 40% by weight, preferably 0.1 to 10% by weight in the sustained-release agricultural chemical preparation.

  Examples of the solvent that can be contained in the sustained release agricultural chemical preparation include saturated aliphatic hydrocarbons such as hexane, decane, tridecane, hexadecane, and octadecane, unsaturated hydrocarbons such as 1-undecene, and 1-hencocene, and Selechlor S45. Halogenated hydrocarbons (made by ICI, trade name), ketones such as methyl ethyl ketone and cyclohexanone, alcohols such as ethanol, butanol and octanol, ethyl acetate, dimethyl phthalate, methyl laurate, ethyl palmitate, octyl acetate , Esters such as dioctyl succinate and didecyl adipate, xylene, ethylbenzene, octadecylbenzene, Solvesso 100 (exxon chemical, trade name), dodecylnaphthalene, tridecylnaphthalene, solvesso 200 (exxon chemical, trade name) Alkyl naphthalenes, glycols such as ethylene glycol and diethylene glycol, glycol ethers such as propylene glycol monomethyl ether and ethylene glycol monoethyl ether, fatty acids such as oleic acid, capric acid and enanthic acid, N, N-dimethylformamide, Acid amides such as N, N-diethylformamide, olive oil, soybean oil, rapeseed oil, castor oil, flaxseed oil, cottonseed oil, palm oil, avocado oil, animal oil such as shark liver oil, mineral oil such as machine oil, glycerin, glycerin Examples include glycerin derivatives such as fatty acid esters. The content of the solvent is usually 30% by weight or less, preferably 0.1 to 20% by weight in the sustained-release agricultural chemical preparation.

  Examples of the stabilizer that can be contained in the sustained-release agricultural chemical preparation include, for example, phenol-based antioxidants, amine-based antioxidants, phosphorus-based antioxidants, sulfur-based antioxidants, ultraviolet absorbers, and epoxidized soybean oil. Epoxidized vegetable oils such as epoxidized linseed oil and epoxidized rapeseed oil, isopropyl acid phosphate, liquid paraffin, ethylene glycol and the like. The content of the stabilizer is usually 0.01 to 10% by weight, preferably 0.01 to 5% by weight in the sustained release agricultural chemical preparation.

  Examples of the colorant that can be contained in the sustained-release agricultural chemical preparation include rhodamines such as rhodamine B and solar rhodamine, and dyes such as yellow No. 4, blue No. 1, and red No. 2, etc. For example, ester fragrances such as ethyl acetoacetate, ethyl enanthate, ethyl cinnamate and isoamyl acetate, organic acid fragrances such as caproic acid and cinnamic acid, alcoholic fragrances such as cinnamon alcohol, geraniol, citral and decyl alcohol, vanillin Aldehydes such as piperonal and perylaldehyde, ketone-based fragrances such as maltol and methyl β-naphthyl ketone, and menthol. Content of a coloring agent and a fragrance | flavor is 0.01 to 5 weight% normally in this sustained release agrochemical formulation, respectively.

  The core material in the sustained release agricultural chemical preparation can be obtained, for example, by granulating by a granulation method usually used in the preparation of agricultural chemicals. Examples of the granulation method include extrusion granulation method, compression granulation method, stirring granulation method, fluidized bed granulation method, fluidized bed granulation method, rolling granulation method, and covering granulation method. Among them, the extrusion granulation method is preferable. An example is shown below.

  Agrochemical active ingredients and solid carriers include agrochemical active ingredients and solid carriers, if necessary, as binder, binder, water-soluble substance, surfactant, solvent, stabilizer, colorant, fragrance, etc. To prepare a mixture. Examples of the mixer used at this time include a ribbon mixer, a nauter mixer, a Shugi mixer, a Henschel mixer, and a ready-mixer. Next, water and / or an aqueous solution of the water-soluble substance is dropped, sprayed or sprayed on the mixture, and kneaded to prepare a kneaded product. Examples of the kneader used at this time include a Nauta mixer, a ribbon mixer, a Henschel mixer, and a kneader. The concentration of the aqueous solution of the water-soluble substance when an aqueous solution of the water-soluble substance is added during kneading varies depending on the water-soluble substance used, but is usually 5 to 85% by weight, preferably 20 to 70% by weight. The amount of water used for kneading is usually 5 to 35% by weight, preferably 10 to 25%, based on the total weight of the water to be added and / or the aqueous solution of the water-soluble substance in the aqueous solution. % By weight. Next, a granulated product is prepared from the kneaded product using a granulator. Examples of the granulator used in this case include basket granulators, screw granulators, extrusion granulators such as pelletizers, compression granulators such as roller compactors, stirring granulators such as Henschel mixers and Nauter mixers. And a rolling granulator such as a pan granulator and a fluidized bed granulator. The core material in the present invention is obtained by subjecting the obtained granulated product to usual drying, sizing and sieving treatment. Examples of the dryer used at this time include a fluidized bed dryer and a bed dryer. Examples of the granulator include a malmerizer, a pin mill, and a crusher. Examples of the sieving machine include a gyro shifter and an electromagnetic vibration type sieving machine. The average particle diameter of the core material thus produced is usually about 0.1 to 5 mm, preferably about 0.5 to 3 mm. The particle diameter in the present invention means the maximum diameter of the core material.

  The content of the coating film in the sustained-release agricultural chemical preparation is usually 1 to 17% by weight, preferably 2 to 10% by weight. The coating film is mainly composed of a film-forming substance, and contains a surfactant, a solvent, a stabilizer, a colorant, a fragrance, and the like as necessary.

The coating film in the sustained-release agricultural chemical preparation is a high molecular weight material having thermoplasticity or thermosetting property obtained by polymerizing or condensing a low molecular weight compound. Preferably, the density (g / cm ³ ) is 0.9 to 1.5, the glass transition point (° C.) is −130 to 60 (more preferably is −60 to 60), the linear expansion coefficient (/ ° C.) is 2 to 15, and the water absorption is Examples thereof include polymer substances having each or all properties such as rate (%) 0.05 to 6 (more preferably 2 to 6).

  Examples of the thermoplastic or thermosetting polymer substance used in the sustained release agricultural chemical preparation include the following resins.

  Examples of the thermoplastic resin include polyolefins such as polyethylene, polypropylene, polybutene, and polystyrene, polyvinyl acetate, polyvinyl chloride, polyvinylidene chloride, polyacrylic acid, polymethacrylic acid, polyacrylic acid ester, and polymethacrylic acid ester. Vinyl polymers, butadiene polymers, isoprene polymers, chloroprene polymers, butadiene-styrene copolymers, ethylene-propylene-diene copolymers, diene polymers such as styrene-isoprene copolymers, ethylene-propylene copolymers Polymer, butene-ethylene copolymer, butene-propylene copolymer, ethylene-vinyl acetate copolymer, ethylene-acrylic acid copolymer, ethylene-methacrylic acid copolymer, ethylene-methacrylic acid ester copolymer , Ethylene monoxide Polyethylene copolymers such as ethylene copolymer, ethylene-vinyl acetate-carbon monoxide copolymer, vinyl chloride copolymers such as vinyl chloride-vinyl acetate copolymer, vinylidene chloride-vinyl chloride copolymer, etc. It is done.

  Examples of the thermosetting resin include urethane resin, epoxy resin, alkyd resin, unsaturated polyester resin, phenol resin, urea / melamine resin, urea resin, and silicon resin.

  The urethane resin is produced by reacting a polyisocyanate and a polyol in the presence of a curing agent such as an organic metal or an amine. Examples of the curing agent include dibutyltin diacetate, dibutyltin dichloride, dibutyltin dilaurate, dibutylthiostannic acid, stannous octylate, di-n-octyltin dilaurate, triethylenediamine, N-methylmorpholine, N , N-dimethyldidodecylamine, N-dodecylmorpholine, N, N-dimethylcyclohexylamine, N-ethylmorpholine, dimethylethanolamine, N, N-dimethylbenzylamine, 1,8-diazabicyclo [5.4.0] Examples include undec-7-ene, isopropyl titanate, tetrabutyl titanate, oxyisopropyl vanadate, n-propyl zirconate, 1,4-diazabicyclo [2.2.2] octane. Polyisocyanate and polyol which are monomers of the urethane resin are used in the form of a monomer alone, a solution, a water-based emulsion, an organic solvent-based emulsion, or the like. Examples of the polyisocyanate include toluene diisocyanate (TDI), diphenylmethane diisocyanate (MDI), naphthalene diisocyanate, tolylene diisocyanate, hexamethylene diisocyanate, isophorone diisocyanate, xylylene diisocyanate, 4,4-methylenebis (cyclohexyl isocyanate), trimethylhexa Examples include methylene diisocyanate, 1,3- (isocyanatomethyl) cyclohexane, triphenylmethane triisocyanate, tris (isocyanatephenyl) thiophosphate, and the polyisocyanate may be a mixture of two or more. Instead of the polyisocyanate, a modified product of the polyisocyanate or an oligomer of the polyisocyanate can be used. Examples of modified products include adduct modified products, biuret modified products, isocyanurate modified products, block modified products, prepolymer modified products, and dimerized modified products. Examples of the polyol include condensed polyester polyols, polyether polyols, polyacrylic acid polyols, lactone polyester polyols, polycarbonate polyols, natural polyols, etc., or modified products of the polyols.

  The condensed polyester polyol is usually obtained by a condensation reaction between a polyol and a dibasic acid, and the polyether polyol is usually obtained by a polymerization reaction of a cyclic oxide. The poly (meth) acrylic acid polyol is usually obtained by a condensation reaction of poly (meth) acrylic acid and a polyol, a condensation reaction of (meth) acrylic acid and a polyol, or a polymerization reaction of a (meth) acrylic acid ester monomer. The lactone polyester polyol is usually obtained by ring-opening polymerization of ε-caprolactam using a polyhydric alcohol as an initiator. Polycarbonate polyol is obtained by reaction of a polyol and a carbonate such as diphenyl carbonate, and the polyol used in this case is usually methylene glycol, ethylene glycol, propylene glycol, tetramethylene glycol, hexamethylene diol, trimethylol propane, Examples thereof include polytetramethylene glycol, glycerin, pentaerythritol, sorbitol, sucrose, and oligomers thereof. Examples of the dibasic acid usually include adipic acid and phthalic acid. Such polyols are commercially available, for example, Sumifene 3086, Sumifene 3900, Sumifene 5200, Sumifen TS, Sumifene TM, Sumifene VN, SBU polyol 0248, SBU polyol 0363, SBU polyol 0474, SBU polyol 480J, SBU polyol 0480, SBU polyol 0485, SBU polyol 0487, SBU polyol 0248, SBU polyol 0363, SBU polyol 0262, Desmophen 550U, Desmophen 900U, Desmophen 1600U, Desmophen 1900U (all are trade names of Sumitomo Bayer Urethane Co., Ltd.) and the like.

  Epoxy resins can react with phenols or alcohols and epichlorohydrin in the presence of a curing agent, with carboxylic acids and epichlorohydrin in the presence of a curing agent, with amines, cyanuric acid or in the presence of a curing agent. It is formed by reaction of hydantoin with epichlorohydrin, reaction of an aliphatic cyclic epoxy compound in the presence of a curing agent such as peracetic acid, and the like. Examples of the curing agent include diethylenetriamine, triethylenetetramine, metaxylylenediamine, isophoronediamine, 1,3-bisaminomethylcyclohexane, diaminodiphenylmethane, 1,3-bisaminomethylcyclohexane, diaminodiphenylmethane, m-phenylenediamine, and diamino. Diphenylsulfone, dicisandyamide, organic acid dihydrazide, polyamide-modified polyamine, ketone-modified polyamine, epoxy-modified polyamine, thiourea-modified polyamine, Mannich-modified polyamine, Michael addition-modified polyamine, dodecenyl succinic anhydride, polyazeline acid anhydride, hexahydrophthalic anhydride , Methyltetrahydrophthalic anhydride, methylnadic anhydride, trimetic anhydride, pyromellitic anhydride, benzophenone tetra Rubonic acid, tetrabromophthalic anhydride, heptanoic anhydride, novolac type polyphenol, polymercaptan, polyisocyanate, carboxylic acid-containing polyester resin, benzyldimethylaniline, 2,4,6-trisdimethylaminomethylphenol, 2-methylimidazole, 2 Examples include ethyl, 4-methyl-imidazole, 2-heptadecylimidazole, aromatic sulfonium salts, aromatic diazonium salts, resol type phenol resins, methylol group-containing urea resins, methylol group-containing melamine resins, and the like.

  Epoxy resins produced include bisphenol A, bisphenol F, brominated bisphenol A, hydrogenated bisphenol A, bisphenol S, bisphenol AF, biphenyl, naphthalene, fluorin, phenol novolac, ortho Cresol novolak type, DPP novolak type, trishydroxyphenylmethane type, glycidyl ether type epoxy resin such as tetraphenylolethane type, tetraglycidyldiaminodiphenylmethane type, triglycidyl isocyanurate type, hydantoin type, aminophenol type, aniline type, toluidine Examples thereof include glycidylamine type epoxy resins such as molds, glycidylamine type epoxy resins, and alicyclic epoxy resins.

  An alkyd resin is produced | generated by reaction of a polybasic acid and a polyhydric alcohol in presence of denaturing agents, such as natural vegetable oil or animal fat, metal soap, and a skin-strengthening agent as needed. Examples of the polybasic acid include phthalic anhydride and maleic anhydride, and examples of the polyhydric alcohol include pentaerythritol and glycerin. Examples of the modifying agent include soybean oil, linseed oil, tung oil, safflower oil, coconut oil, palm oil, dehydrated castor oil, etc., and the metal soap is usually manganese, cobalt, zirconium, nickel, Examples thereof include naphthenes or octyl acids such as iron and lead, such as zirconium octylate, manganese naphthenate, cobalt octylate, and the like, or a mixture thereof. Examples of the anti-skinning agent include dipentene, methoxyphenol, cyclohexanone oxime, methyl ethyl ketone oxime, and the like, or mixtures thereof.

  An unsaturated polyester resin is produced by reacting an unsaturated dibasic acid and a dihydric alcohol in the presence of a vinyl monomer. Examples of the unsaturated dibasic acid include phthalic anhydride, isophthalic acid, terephthalic acid, succinic acid, adipic acid, azelaic acid, sebacic acid, tetrahydrophthalic anhydride, hexahydrophthalic anhydride, tetrabromophthalic anhydride, tetrachlorophthalic anhydride Examples of the dihydric alcohol include ethylene glycol, propylene glycol, 1,3-butylene glycol, 1,6-hexanediol, diethylene glycol, dipropylene glycol, and the like. Neopentyl glycol, triethylene glycol, hydrogenated bisphenol A, bisphenol dihydroxypropyl ether and the like can be mentioned. Examples of the vinyl monomer include styrene, vinyl toluene, chlorostyrene, diallyl phthalate, triallyl cyanurate, and methyl methacrylate.

  A phenol resin is produced by reacting a phenol and an aldehyde in the presence of a catalyst such as hydrochloric acid, oxalic acid, hexamethylenetetramine and the like. Examples of the phenols include phenol, o-cresol, m-cresol, p-cresol, xylenol, p-tert-butylphenol, resorcinol and the like. In this reaction, a novolac type phenol resin is obtained under an acidic catalyst, and a resol type phenol resin is obtained under a basic catalyst.

  Urea / melamine resin is produced by the reaction of urea or melamine with formalin in the presence of a basic catalyst. Silicone resin is produced by the reaction of silicon and polyfunctional siloxane in the presence of a catalyst.

  The film forming material used for the coating film in the sustained release agricultural chemical preparation is preferably a thermosetting resin such as a polyurethane resin or an epoxy resin from the viewpoint of ease of handling of the monomer, conditions for the curing reaction, rain resistance, etc. A urethane resin is more preferable.

  Examples of the solid carrier, surfactant, solvent, stabilizer, colorant, and fragrance that can be included in the coating film include the same materials as those described above in the section of the core material.

  The sustained-release agricultural chemical preparation can be obtained by coating the core material with a coating film. As a coating method using a coating film, for example, a film forming material is dissolved or dispersed in a solvent, and the solution is added to a core material moving in a rotating pan, a rotating drum, a fluidized bed, a fluidized bed, etc. The film is dried at the same time to form and grow a coating film to coat it to a predetermined coverage (coating drying method), and the raw material of the film forming material is moved with a rotating pan, rotating drum, stirring mixer, etc. While adding to the core material, heating or cooling as necessary, adding a catalyst as necessary, curing the raw material of the film-forming material to form and grow a coating film, and a predetermined coating And a method of coating up to a rate (film curing method). Of these coating methods, the film drying method is generally used when coating a thermoplastic resin, and the film curing method is often used when coating a thermosetting resin. Also, when coating the core material, if a large amount of film forming material is added to the moving core material at once, the film forming material becomes spinnable in the process of forming the coating film, and the core material aggregates. Since it tends to be agglomerated, the film-forming material is preferably added intermittently in small units.

  The average particle size of the particles composed of the core material and the coating film in the sustained-release agricultural chemical preparation is usually about 0.1 to 5 mm, preferably about 0.5 to 3 mm.

  The coverage of the sustained release agrochemical formulation with the polymer substance (ratio of the coating material weight to the core material weight) is usually 1 to 20%, preferably 2 to 10%, based on the average particle diameter of the core material. However, a suitable value may be set according to the effectiveness of the active ingredient, the application time, the expected rainfall at the application location, and the like.

  When this sustained-release agrochemical formulation is used in paddy fields, the application amount is usually 0.1 to 10 kg, preferably 0.25 to 5 kg per 10 ares. A method of directly spraying by hand, a back type granulator, a pipe granulator, an aerial granulator, a multi-hose granulator, a rice transplanter equipped with a granulator, a tiller equipped with a granulator, etc. Examples of the method used are listed below.

  In order to prevent the stink bugs from sucking into the rice ears, this controlled release pesticide preparation is used in the period from the transplanting of paddy rice to before heading, at a level above the amount of stink bug sucking inhibitory effect. Apply directly once inside. Specifically, for example, if 1 g or more of active ingredient per 10 ares is applied directly to the water surface of paddy field once during the period from transplanting rice to before heading, the sustained release pesticide preparation is continuously applied. The proper amount of the active ingredient that is eluted is absorbed from the roots and stems and leaves of rice, and then transferred to other parts of the plant, causing the stink bugs to suck or eat the stems and leaves, thereby causing the stink bugs to die. Or even if it does not lead to death completely, it is thought that the effect | action which prevents the positive sucking by the said stink bugs has arisen. Even if a large amount of the active ingredient is applied, there is no effect on the suppression of paddy rice damage by stink bugs, but an application amount of 100 g or less will be sufficient from an economical point of view. Preferably, an application rate of 10 to 70 g of active ingredient per 10 ares will be sufficient. And the method of this invention can act with respect to stink bugs by direct application to the water surface of a paddy field, and can obtain a sufficient spotted rice suppression effect.

Hereinafter, the present invention will be described in more detail with reference to formulation examples and test examples, but the present invention is not limited to these examples.
First, formulation examples are shown. In addition, a part represents a weight part.

Production Example 1
(1) 1- (2-Chloro-1,3-thiazol-5-ylmethyl) -3-methyl-2-nitroguanidine 1.6 parts by weight and water-containing aluminum silicate 0.7 parts by weight After mixing, it was pulverized with a pin mill. The average particle size of the obtained pulverized product was 15 μm (measured value with a laser particle measuring device). 2.3 parts by weight of the pulverized product obtained above, 3.0 parts by weight of polyvinyl alcohol, 20.0 parts by weight of bentonite hotaka (manufactured by Hojun) and 59.2 calcium carbonate fine powder (average particle size 14.8 μm) By mixing well with parts by weight, a mixed powder was obtained. 35 parts by weight of an aqueous solution obtained by dissolving 1.5 parts by weight of urea, 12.0 parts by weight of sucrose and 2.0 parts by weight of polyoxyethylene styryl phenyl ether in 15 parts by weight of water was added to the mixed powder. Kneaded well. The obtained kneaded material was granulated with a small extrusion granulator with a screen of 0.9 mmφ, sized, and then dried at 60 ° C. for 15 minutes to obtain a core material having a particle size of 1400 to 850 μm. .
(2) Polymer MDI (diphenylmethane diisocyanate) 37 while rotating 1000 parts by weight of the obtained core material in a temperature-controllable inclined pan type rolling granulator equipped with a hot air generator and maintaining at 80 ° C. .6% by weight, branched polyether polyol 33.2% by weight, linear polyether polyol 28.2% by weight and 2,4,6-tris (dimethylaminomethyl) phenol 1.0% by weight , Referred to as Mixture A.) 5 parts by weight were added and kept at 80 ° C. for 5 minutes. The sustained-release agricultural chemical preparation (1) was obtained by repeating the addition of 5 g of the mixture A and the operation of maintaining at 80 ° C. for 5 minutes 12 times, and finally holding at 80 ° C. for 10 minutes. In addition, the coverage (the ratio of the weight of the coating material with respect to the weight of the core material) of the sustained-release agricultural chemical preparation with the polymer substance was 6.0%.

Production Example 2
(1) The amount of fine calcium carbonate powder (average particle size 14.8 μm) is 62.7 parts by weight, 1.5 parts by weight of urea and 12.0 parts by weight of sucrose are changed to 10 parts by weight of urea alone, A core material having a particle size of 1400 to 850 μm is obtained by the same production method as Production Example 1 (1) except that the amount of the aqueous solution to be contained is 25 parts by weight.
(2) Mixture A This sustained-release agrochemical formulation (2) was prepared by the same production method as in Production Example 1 (2) except that the addition of 5 parts by weight and the operation of maintaining at 80 ° C. for 5 minutes was repeated 11 times. ) In addition, the coverage (the ratio of the weight of the coating material to the weight of the core material) of the sustained-release agrochemical preparation is 5.5%.

Production Example 3
(1) The amount of fine calcium carbonate powder (average particle size 14.8 μm) was changed to 57.7 parts by weight, 1.5 parts by weight of urea and 12.0 parts by weight of sucrose were changed to 15 parts by weight of urea alone. A core material having a particle size of 1400 to 850 μm is obtained by the same production method as in Production Example 1 (1) except that the amount of the aqueous solution contained is 30 parts by weight.
(2) Mixture A This sustained-release agrochemical formulation was prepared in the same manner as in Production Example 1 (2) except that the addition of 5 parts by weight and the operation of maintaining at 80 ° C. for 5 minutes was repeated 8 times. (3) is obtained. In addition, the coverage (the ratio of the weight of the coating material to the weight of the core material) of the sustained-release agricultural chemical preparation with a polymer substance is 4.0%.

Production Example 4
(1) The amount of fine powder of calcium carbonate (average particle size 14.8 μm) is 52.7 parts by weight, 1.5 parts by weight of urea and 12.0 parts by weight of sucrose are changed to 20 parts by weight of urea alone. A core material having a particle diameter of 1400 to 850 μm is obtained by the same production method as in Production Example 1 (1) except that the amount of the aqueous solution contained is 35 parts by weight.
(2) Mixture A This sustained-release agrochemical formulation was prepared by the same production method as in Production Example 1 (2) except that the addition of 5 parts by weight and the operation of maintaining at 80 ° C. for 5 minutes was repeated 6 times. (4) is obtained. In addition, the coverage (the ratio of the weight of the coating material to the weight of the core material) of the sustained-release agricultural chemical preparation with the polymer substance is 3.0%.

Production Example 5
(1) A core material having a particle size of 1400 to 850 μm is obtained by the same production method as in Production Example 1 (1) except that sucrose is used instead of urea.
(2) Mixture A This sustained-release agrochemical formulation was prepared in the same manner as in Production Example 1 (2) except that the addition of 5 parts by weight and the operation of maintaining at 80 ° C. for 5 minutes was repeated 14 times. (5) is obtained. In addition, the coverage (the ratio of the weight of the coating material to the weight of the core material) of the sustained-release agrochemical preparation is 7.0%.

Production Example 6
(1) A core material having a particle size of 1400 to 850 μm is obtained by the same production method as in Production Example 2 (1) except that sucrose is used instead of urea.
(2) Mixture A This sustained-release agrochemical formulation was prepared in the same manner as in Production Example 2 (2) except that the addition of 5 parts by weight and the operation of maintaining at 80 ° C. for 5 minutes was repeated 10 times. (6) is obtained. In addition, the coverage (the ratio of the weight of the coating material with respect to the weight of the core material) of the sustained-release agricultural chemical preparation by the polymer substance is 5.0%.

Production Example 7
(1) A core material having a particle size of 1400 to 850 μm is obtained by the same production method as in Production Example 3 (1) except that sucrose is used instead of urea.
(2) Mixture A This sustained-release agrochemical formulation was prepared in the same manner as in Production Example 3 (2) except that the addition of 5 parts by weight and the operation of maintaining at 80 ° C. for 5 minutes was repeated 11 times. (7) is obtained. In addition, the coverage (the ratio of the weight of the coating material to the weight of the core material) of the sustained-release agrochemical preparation is 5.5%.

Production Example 8
(1) A core material having a particle size of 1400 to 850 μm is obtained by the same production method as in Production Example 4 (1) except that sucrose is used instead of urea.
(2) Mixture A This sustained-release agrochemical formulation was prepared in the same manner as in Production Example 4 (2) except that the addition of 5 parts by weight and the operation of maintaining at 80 ° C. for 5 minutes was repeated 10 times. (8) is obtained. In addition, the coverage (the ratio of the weight of the coating material with respect to the weight of the core material) of the sustained-release agricultural chemical preparation by the polymer substance is 5.0%.

Production Example 9
(1) The amount of calcium carbonate fine powder (average particle size: 14.8 μm) is changed to 57.7 parts by weight, and 1.5 parts by weight of urea and 12.0 parts by weight of sucrose are changed to 10 parts by weight of urea and 5 parts by weight of sucrose. Then, a core material having a particle size of 1400 to 850 μm is obtained by the same production method as in Production Example 1 (1) except that the amount of the aqueous solution containing urea and sucrose is 30 parts by weight.
(2) Mixture A This sustained-release agrochemical formulation was prepared in the same manner as in Production Example 1 (2) except that the addition of parts by weight g and the operation of maintaining at 80 ° C. for 5 minutes was repeated 8 times. (9) is obtained. In addition, the coverage (the ratio of the weight of the coating material to the weight of the core material) of the sustained-release agricultural chemical preparation with a polymer substance is 4.0%.

Production Example 10
(1) A core material having a particle size of 1400 to 850 μm is obtained by the same production method as in Production Example 9 (1) except that the amount of urea is 5 parts by weight and the amount of sucrose is 10 parts by weight. .
(2) Mixture A This sustained-release agrochemical formulation was prepared in the same manner as in Production Example 9 (2) except that the addition of 5 parts by weight and the operation of maintaining at 80 ° C. for 5 minutes was repeated 12 times. (10) is obtained. In addition, the coverage (the ratio of the weight of the coating material to the weight of the core material) of the sustained-release agricultural chemical preparation by the polymer substance is 6.0%.

Production Example 11
(1) The amount of fine calcium carbonate powder (average particle size 14.8 μm) is 62.7 parts by weight, the amount of urea is 5 parts by weight, and the amount of aqueous solution containing urea and sucrose is 25 parts by weight. Except for the above, a core material having a particle size of 1400 to 850 μm is obtained by the same production method as in Production Example 9 (1).
(2) Mixture A This sustained-release agrochemical formulation was prepared in the same manner as in Production Example 9 (2) except that the addition of 5 parts by weight and the operation of maintaining at 80 ° C. for 5 minutes was repeated 11 times. (11) is obtained. In addition, the coverage (the ratio of the weight of the coating material to the weight of the core material) of the sustained-release agrochemical preparation is 5.5%.

Production Example 12
(1) A core material having a particle diameter of 1400 to 850 μm is obtained by the same production method as in Production Example 9 (1) except that both the amounts of urea and sucrose are 7.5 parts by weight.
(2) Mixture A This sustained-release agrochemical formulation was prepared in the same manner as in Production Example 9 (2) except that the addition of 5 parts by weight and the operation of maintaining at 80 ° C. for 5 minutes was repeated 7 times. (12) is obtained. In addition, the coverage (the ratio of the weight of the coating material to the weight of the core material) of the sustained-release agricultural chemical preparation with a polymer substance is 3.5%.

Production Example 13
(1) The amount of fine powder of calcium carbonate (average particle size 14.8 μm) is 52.7 parts by weight, the amount of urea and sucrose is both 10 parts by weight, and the amount of aqueous solution containing urea and sucrose is 35 parts by weight. A core material having a particle size of 1400 to 850 μm is obtained by the same production method as in Production Example 9 (1) except that
(2) The sustained-release agrochemical formulation according to the same production method as in Production Example 9 (2) except that the addition of 5 parts by weight of mixture A and the operation of maintaining at 80 ° C. for 5 minutes is repeated 6 times. (13) is obtained. In addition, the coverage (the ratio of the weight of the coating material to the weight of the core material) of the sustained-release agricultural chemical preparation with the polymer substance is 3.0%.

Production Example 14
(1) A core material having a particle size of 1400 to 850 μm is produced by the same production method as in Production Example 12 (1) except that kaolin clay is used instead of fine calcium carbonate powder (average particle size 14.8 μm). obtain.
(2) The sustained-release agrochemical formulation according to the same production method as in Production Example 12 (2) except that the addition of 5 parts by weight of mixture A and the operation of maintaining at 80 ° C. for 5 minutes is repeated 8 times. (14) is obtained. In addition, the coverage (the ratio of the weight of the coating material to the weight of the core material) of the sustained-release agricultural chemical preparation with a polymer substance is 4.0%.

Production Example 15
(1) Production Example 12 (1) except that the amount of bentonite Fuji (manufactured by Toyoshun Yoko) is 5 parts by weight and the amount of fine calcium carbonate powder (average particle size 14.8 μm) is 72.7 parts by weight. A core material having a particle size of 1400 to 850 μm is obtained by the same manufacturing method as described above.
(2) The sustained-release agrochemical formulation according to the same production method as in Production Example 12 (2) except that the addition of 5 parts by weight of mixture A and the operation of maintaining at 80 ° C. for 5 minutes is repeated 8 times. (15) is obtained. In addition, the coverage (the ratio of the weight of the coating material to the weight of the core material) of the sustained-release agricultural chemical preparation with a polymer substance is 4.0%.

Production Example 16
(1) Production Example 12 (1) except that the amount of bentonite Fuji (manufactured by Toyoshun Yoko) is 10 parts by weight and the amount of fine calcium carbonate powder (average particle size 14.8 μm) is 67.7 parts by weight. A core material having a particle size of 1400 to 850 μm is obtained by the same manufacturing method as described above.
(2) The sustained-release agrochemical formulation according to the same production method as in Production Example 12 (2) except that the addition of 5 parts by weight of mixture A and the operation of maintaining at 80 ° C. for 5 minutes is repeated 8 times. (16) is obtained. In addition, the coverage (the ratio of the weight of the coating material to the weight of the core material) of the sustained-release agricultural chemical preparation with a polymer substance is 4.0%.

Production Example 17
(1) Production Example 12 (1) except that the amount of bentonite Fuji (manufactured by Toyoshun Yoko) is 30 parts by weight and the amount of fine calcium carbonate powder (average particle size 14.8 μm) is 47.7 parts by weight. A core material having a particle size of 1400 to 850 μm is obtained by the same manufacturing method as described above.
(2) The sustained-release agrochemical formulation according to the same production method as in Production Example 12 (2) except that the addition of 5 parts by weight of mixture A and the operation of maintaining at 80 ° C. for 5 minutes is repeated 8 times. (17) is obtained. In addition, the coverage (the ratio of the weight of the coating material to the weight of the core material) of the sustained-release agricultural chemical preparation with a polymer substance is 4.0%.

Production Example 18
(1) A core material having a particle size of 1400 to 850 μm is obtained by the same production method as in Production Example 12 (1) except that sodium carboxymethylcellulose is used instead of polyvinyl alcohol.
(2) Mixture A This sustained-release agrochemical formulation was prepared in the same manner as in Production Example 12 (2) except that the addition of 5 parts by weight and the operation of maintaining at 80 ° C. for 5 minutes was repeated 10 times. (18) is obtained. In addition, the coverage (the ratio of the weight of the coating material with respect to the weight of the core material) of the sustained-release agricultural chemical preparation by the polymer substance is 5.0%.

Production Example 19
(1) A particle size of 1400 to 850 μm is obtained by the same production method as in Production Example 12 (1) except that 1 part by weight of polyvinyl alcohol and 2 parts by weight of sodium carboxymethylcellulose are used instead of 3 parts by weight of polyvinyl alcohol. Get the core material.
(2) Mixture A This sustained-release agrochemical formulation was prepared in the same manner as in Production Example 12 (2) except that the addition of 5 parts by weight and the operation of maintaining at 80 ° C. for 5 minutes was repeated 10 times. (19) is obtained. In addition, the coverage (the ratio of the weight of the coating material with respect to the weight of the core material) of the sustained-release agricultural chemical preparation by the polymer substance is 5.0%.

Production Example 20
(1) A particle size of 1400 to 850 μm is obtained by the same production method as in Production Example 12 (1) except that 1 part by weight of polyvinyl alcohol and 2 parts by weight of sodium carboxymethylcellulose are used instead of 3 parts by weight of polyvinyl alcohol. Get the core material.
(2) The sustained-release agrochemical formulation according to the same production method as in Production Example 12 (2) except that the addition of 5 parts by weight of mixture A and the operation of maintaining at 80 ° C. for 5 minutes is repeated 8 times. (20) is obtained. In addition, the coverage (the ratio of the weight of the coating material to the weight of the core material) of the sustained-release agricultural chemical preparation with a polymer substance is 4.0%.

Production Example 21
(1) A similar production method as in Production Example 12 (1) except that the amount of polyvinyl alcohol is 1 part by weight and the amount of fine calcium carbonate powder (average particle size 14.8 μm) is 57.2 wt. Thus, a core material having a particle size of 1400 to 850 μm is obtained.
(2) Mixture A This sustained-release agrochemical formulation was prepared in the same manner as in Production Example 12 (2) except that the addition of 5 parts by weight and the operation of maintaining at 80 ° C. for 5 minutes was repeated 12 times. (21) is obtained. In addition, the coverage (the ratio of the weight of the coating material to the weight of the core material) of the sustained-release agricultural chemical preparation by the polymer substance is 6.0%.

Production Example 22
(1) The same production method as in Production Example 12 (1) except that the amount of polyvinyl alcohol is 2 parts by weight and the amount of fine calcium carbonate powder (average particle size 14.8 μm) is 56.2 parts by weight. Thus, a core material having a particle size of 1400 to 850 μm is obtained.
(2) Mixture A This sustained-release agrochemical formulation was prepared in the same manner as in Production Example 12 (2) except that the addition of 5 parts by weight and the operation of maintaining at 80 ° C. for 5 minutes was repeated 12 times. (22) is obtained. In addition, the coverage (the ratio of the weight of the coating material to the weight of the core material) of the sustained-release agricultural chemical preparation by the polymer substance is 6.0%.

Production Example 23
(1) A similar production method as in Production Example 12 (1) except that the amount of polyvinyl alcohol is 5 parts by weight and the amount of fine calcium carbonate powder (average particle size 14.8 μm) is 53.2 parts by weight. Thus, a core material having a particle size of 1400 to 850 μm is obtained.
(2) The sustained-release pesticide formulation according to the same production method as in Production Example 12 (2), except that the addition of 5 parts by weight of Mixture A and the operation of maintaining at 80 ° C. for 5 minutes is repeated 6 times. (23) is obtained. In addition, the coverage (the ratio of the weight of the coating material to the weight of the core material) of the sustained-release agricultural chemical preparation with the polymer substance is 3.0%.

Production Example 24
(1) Similar to Production Example 12 (1) except that Bentonite Fuji (manufactured by Toyoshun Yoko) is not added and the amount of calcium carbonate fine powder (average particle size 14.8 μm) is 77.7 wt. By a simple manufacturing method, a core material having a particle size of 1400 to 850 μm is obtained.
(2) The sustained-release pesticide formulation according to the same production method as in Production Example 12 (2), except that the addition of 5 parts by weight of Mixture A and the operation of maintaining at 80 ° C. for 5 minutes is repeated 6 times. (24) is obtained. In addition, the coverage (the ratio of the weight of the coating material to the weight of the core material) of the sustained-release agricultural chemical preparation with the polymer substance is 3.0%.

Production Example 25
(1) The amount of calcium carbonate fine powder (average particle size 14.8 μm) is 58.7 parts by weight, the amount of polyvinyl alcohol is 2 parts by weight, calcium nitrate is used in place of urea, and the aqueous solution containing urea is replaced. A core material having a particle size of 1400 to 850 μm is obtained by the same production method as in Production Example 3 (1) except that an aqueous solution containing calcium nitrate is used.
(2) Mixture A This sustained-release agrochemical formulation was prepared by the same production method as in Production Example 3 (2) except that the addition of 5 parts by weight and the operation of maintaining at 80 ° C. for 5 minutes was repeated 10 times. (25) is obtained. In addition, the coverage (the ratio of the weight of the coating material with respect to the weight of the core material) of the sustained-release agricultural chemical preparation by the polymer substance is 5.0%.

Production Example 26
(1) The amount of calcium carbonate fine powder (average particle size 14.8 μm) is 63.7 parts by weight, the amount of polyvinyl alcohol is 2 parts by weight, dextrin is used instead of urea, and the aqueous solution containing urea is replaced. A core material having a particle size of 1400 to 850 μm is obtained by the same production method as in Production Example 2 (1) except that an aqueous solution containing dextrin is used.
(2) Mixture A This sustained-release agrochemical formulation was prepared in the same manner as in Production Example 2 (2) except that the addition of 5 parts by weight and the operation of maintaining at 80 ° C. for 5 minutes was repeated 10 times. (26) is obtained. In addition, the coverage (the ratio of the weight of the coating material with respect to the weight of the core material) of the sustained-release agricultural chemical preparation by the polymer substance is 5.0%.

Production Example 27
(1) By using the same production method as in Production Example 26 (1) except that glucose is used instead of dextrin and an aqueous solution containing glucose is used instead of an aqueous solution containing dextrin, the particle size is 1400 to 850 μm. The core material is obtained.
(2) The sustained release agricultural chemical preparation (27) is obtained by the same production method as in Production Example 26 (2). In addition, the coverage (the ratio of the weight of the coating material with respect to the weight of the core material) of the sustained-release agricultural chemical preparation by the polymer substance is 5.0%.

Production Example 28
(1) The amount of fine calcium carbonate powder (average particle size 14.8 μm) is 53.7 parts by weight, 20 parts by weight of magnesium sulfate is used instead of 10 parts by weight of dextrin, and 25 parts by weight of an aqueous solution containing dextrin is used. A core material having a particle size of 1400 to 850 μm is obtained by the same production method as in Production Example 26 (1) except that 35 parts by weight of an aqueous solution containing magnesium sulfate is used.
(2) The sustained release agricultural chemical preparation (28) is obtained by the same production method as in Production Example 26 (2). In addition, the coverage (the ratio of the weight of the coating material with respect to the weight of the core material) of the sustained-release agricultural chemical preparation by the polymer substance is 5.0%.

Production Example 29
(1) In the same manner as in Production Example 25 (1) except that potassium carbonate is used instead of calcium nitrate and an aqueous solution containing potassium carbonate is used instead of an aqueous solution containing calcium nitrate, Of 1400 to 850 μm.
(2) The sustained release agricultural chemical preparation (29) is obtained by the same production method as in Production Example 25 (2). In addition, the coverage (the ratio of the weight of the coating material with respect to the weight of the core material) of the sustained-release agricultural chemical preparation by the polymer substance is 5.0%.

Production Example 30
(1) In the same manner as in Production Example 25 (1) except that potassium pyrophosphate is used instead of calcium nitrate and an aqueous solution containing potassium pyrophosphate is used instead of an aqueous solution containing calcium nitrate, A core material having a particle size of 1400 to 850 μm is obtained.
(2) The sustained release agricultural chemical preparation (30) is obtained by the same production method as in Production Example 26 (2). In addition, the coverage (the ratio of the weight of the coating material with respect to the weight of the core material) of the sustained-release agricultural chemical preparation by the polymer substance is 5.0%.

Production Example 31
(1) A particle size of 1400 is obtained by the same production method as in Production Example 25 (1) except that ammonium nitrate is used instead of calcium nitrate and an aqueous solution containing ammonium nitrate is used instead of an aqueous solution containing calcium nitrate. A core material of ˜850 μm is obtained.
(2) The sustained release agricultural chemical preparation (31) is obtained by the same production method as in Production Example 25 (2). In addition, the coverage (the ratio of the weight of the coating material with respect to the weight of the core material) of the sustained-release agricultural chemical preparation by the polymer substance is 5.0%.

Production Example 32
(1) By using the same production method as in Production Example 25 (1) except that citric acid is used instead of calcium nitrate and an aqueous solution containing citric acid is used instead of an aqueous solution containing calcium nitrate, Of 1400 to 850 μm.
(2) The sustained release agricultural chemical preparation (32) is obtained by the same production method as in Production Example 25 (2). In addition, the coverage (the ratio of the weight of the coating material with respect to the weight of the core material) of the sustained-release agricultural chemical preparation by the polymer substance is 5.0%.

Production Example 33
An aqueous solution containing urea by changing the amount of calcium carbonate fine powder (average particle size 2.2 μm) to 62.7 parts by weight, changing 1.5 parts by weight of urea and 12.0 parts by weight of sucrose to 10 parts by weight of urea alone. A core material having a particle size of 1400 to 850 μm is obtained by the same production method as in Production Example 1 (1) except that the amount is 25 parts by weight.
(2) Mixture A This sustained-release agrochemical formulation (2) was prepared by the same production method as in Production Example 1 (2) except that the addition of 5 parts by weight and the operation of maintaining at 80 ° C. for 5 minutes was repeated 11 times. ) In addition, the coverage (the ratio of the weight of the coating material to the weight of the core material) of the sustained-release agrochemical preparation is 5.5%.

Production Example 34
An aqueous solution containing urea by changing the amount of calcium carbonate fine powder (average particle size 30.0 μm) to 62.7 parts by weight, changing 1.5 parts by weight of urea and 12.0 parts by weight of sucrose to 10 parts by weight of urea alone. A core material having a particle size of 1400 to 850 μm is obtained by the same production method as in Production Example 1 (1) except that the amount is 25 parts by weight.
(2) Mixture A This sustained-release agrochemical formulation (2) was prepared by the same production method as in Production Example 1 (2) except that the addition of 5 parts by weight and the operation of maintaining at 80 ° C. for 5 minutes was repeated 11 times. ) In addition, the coverage (the ratio of the weight of the coating material to the weight of the core material) of the sustained-release agrochemical preparation is 5.5%.

Production Example 35
An aqueous solution containing urea by changing the amount of fine powder of calcium carbonate (average particle diameter 14.8 μm) to 62.7 parts by weight, changing 1.5 parts by weight of urea and 12.0 parts by weight of sucrose to 10 parts by weight of urea alone. A core material having a particle size of 1400 to 850 μm is obtained by the same production method as in Production Example 1 (1) except that the amount is 25 parts by weight.
(2) Mixture A This sustained-release agrochemical formulation (2) was prepared by the same production method as in Production Example 1 (2) except that the addition of 5 parts by weight and the operation of maintaining at 80 ° C. for 5 minutes was repeated twice. ) In addition, the coverage (the ratio of the weight of the coating material to the weight of the core material) of the sustained-release agricultural chemical preparation with a polymer substance is 1.0%.

Production Example 36
An aqueous solution containing urea by changing the amount of fine powder of calcium carbonate (average particle diameter 14.8 μm) to 62.7 parts by weight, changing 1.5 parts by weight of urea and 12.0 parts by weight of sucrose to 10 parts by weight of urea alone. A core material having a particle size of 1400 to 850 μm is obtained by the same production method as in Production Example 1 (1) except that the amount is 25 parts by weight.
(2) Mixture A This sustained-release agrochemical formulation (2) was prepared by the same production method as in Production Example 1 (2) except that the addition of 5 parts by weight and the operation of maintaining at 80 ° C. for 5 minutes was repeated 40 times. ) In addition, the coverage (the ratio of the weight of the coating material to the weight of the core material) of the sustained-release agricultural chemical preparation with a polymer substance is 20.0%.

Test example 1
The sustained-release agricultural chemical formulation obtained in Production Example 1 was applied once to the water surface of the rice plant (Koshihikari: 1 / 5000a pot: managed at a water depth of 3 cm) 12 days before heading. In the control group, 1- (2-chloro-1,3-thiazol-5-ylmethyl) -3-methyl-2-nitroguanidine granules not coated with a polymer substance was added to 1- (2-chloro-1 , 3-thiazol-5-ylmethyl) -3-methyl-2-nitroguanidine was applied in the same amount. After the application, a zone where rain treatment is performed and a zone where rain treatment is not performed are provided. After 6 days from the treatment, rain treatment of 20 mm to 30 mm is performed at a rate of 3 times a week after the treatment so that the water does not overflow. . On both the 22th and 28th day after treatment, the whole rice strain was covered with nylon goose, and 10 adults of the red-faced winged turtle were released in it. Five days after each release, the number of surviving insects was counted, the surviving insects were removed, and nylon goose was removed. Thereafter, 40 days after heading, the ears were harvested and chopped, and the spotted rice rate was investigated.
As a result, as is apparent from Table 1, when the rain treatment was performed in the control plot, the mortality rate was clearly reduced, and the tendency for the spotted rice rate to increase was observed. On the other hand, in the case where there is a rain treatment in the application section of the sustained release agricultural chemical preparation obtained in Production Example 1 (that is, the present invention section), compared with the case where there is no rain treatment in the application section. However, it was clarified that the effect of suppressing paddy rice damage by paddy rice stink bugs was not decreased, and that the high effect was maintained regardless of whether there was rainfall.

According to the method of the present invention, it is possible to stably suppress damage to paddy rice caused by paddy rice sucking stink bugs regardless of the weather conditions with or without rainfall.

Claims (5)

A core material containing an insecticidal neonicotinoid compound having osmotic transferability as an active ingredient and a solid carrier is coated with a high-curing or thermoplastic polymer material obtained by polymerizing or condensing a low molecular weight compound. A rain-resistant sustained-release agricultural chemical formulation that is film-coated at -20% (ratio of coating material weight to core material weight) is applied directly to the water surface of the paddy field once during the period from paddy rice transplanting to heading. A method for suppressing damage to paddy rice by paddy rice stink bugs, comprising a step of applying the paddy rice. The active ingredient is methyl} -3-methyl-2-nitroguanidine substituted with 1-{(5-membered hetero ring optionally having halogen atom)}. A method for controlling damage to paddy rice by paddy rice stink bugs. The active ingredient is 1- (2-chloro-1,3-thiazol-5-ylmethyl) -3-methyl-2-nitroguanidine and / or 1- (tetrahydro-3-furylmethyl) -3-methyl-2- The method for suppressing damage to paddy rice by paddy rice stink bugs according to claim 1, which is nitroguanidine. The method for suppressing damage to paddy rice by paddy rice sucking stink bugs according to any one of claims 1 to 3, wherein the solid carrier is a fine powder substance of 2 to 30 µm. The method for suppressing damage to paddy rice by paddy rice sucking bugs according to any one of claims 1 to 5, wherein the damage to paddy rice is the occurrence of spotted rice.