JPWO2016080460A1 - Preparation method of seed formulation by iron coating - Google Patents

Abstract

The present invention is a practical application of weeds, particularly weeds in paddy fields, in which the herbicidal compound of the herbicidal composition is rapidly eluted and generated out of the seed system without causing phytotoxicity to the crops themselves, particularly paddy rice. A method for producing a seed preparation by iron coating that can be controlled is provided. In the preparation process of the seed formulation by iron coating, the herbicidal composition formulated appropriately is subjected to seed treatment before the oxidation reaction of iron powder stops.

Description

  The present invention relates to a method of treating a herbicidal composition on seeds by iron coating, a seed preparation by iron coating treated with the herbicidal composition by the above method, and a weed characterized by sowing the seed preparation on a soil surface It relates to a control method.

  As cultivation methods for paddy rice, transplanted paddy rice cultivation for transplanting the seedlings that have been raised and direct sowing paddy rice cultivation for directly sowing seeds are widely known.

  As direct sowing rice cultivation, flooded direct sowing rice cultivation and dry rice direct sowing rice cultivation are known. A method of coating seeds with iron powder, calcium peroxide, or molybdenum compound is also generally known. In particular, iron-coated seeds coated with iron powder have been rapidly spreading in recent years because they can reduce the risk of bird damage and floating seedlings and can be surface-seeded (Non-Patent Document 1).

  One of the major problems in direct sowing cultivation of iron-coated seeds is weed control. Since direct sowing rice cultivation has a longer cultivation period than transplanted rice cultivation, weeds need to be controlled for a longer period of time. For this reason, since the number of times of herbicide spraying is increased and labor is required, labor saving of weed control is desired.

  One of the effective methods for saving pesticide spraying is seed treatment. Seeds treated with fungicides, seeds treated with pesticides and seeds treated with plant growth agents are widely known. (Patent Documents 1 to 3). Patent document 4 makes it a solution subject to raise the coating intensity | strength of an iron powder coating rice seed, By adding a sulfate and a chloride to a rice seed in addition to iron powder, it promotes the oxidation of metal iron powder. A method for improving the coating strength of rice seeds is disclosed. Also known is a technique for treating paddy rice coated seeds with insecticides and fungicides. Patent Document 5 treats rice seeds with iron powder and treats them with a disease resistance inducer. A method is disclosed. Patent Document 6 describes a method of treating rice seeds with a coating material such as iron powder and a bactericide or insecticide.

  Generally, in order to quickly elute herbicidal active ingredients in the surface water, a high formulation technique such as selection of appropriate wetting agents and dispersants is required (Patent Document 7).

  The method for controlling weeds with plant seeds treated with herbicides is typically coated with an adhesive resin layer containing, for example, herbicides and optionally containing surfactants and / or inorganic auxiliaries. Use of herbicide-coated rice straw seeds (Patent Document 8) can be mentioned. This seed has an adhesive resin layer, and an aqueous adhesive resin solution containing a herbicide [herbicide active ingredient (herbicidal ingredient) or herbicide preparation], a surfactant and an inorganic auxiliary agent is applied to the surface of rice seeds. After coating, it is produced by forced drying or air drying to form a film. The adhesive resin layer is composed of one or two or more components of a water-insoluble or water-soluble adhesive resin, or one or two or more components of a water-soluble adhesive resin and one or two or more components of a water-insoluble resin. Therefore, by adjusting the mixing ratio of the water-insoluble adhesive resin and the water-soluble adhesive resin, the elution rate of the herbicidal component can be adjusted, and the effect can be expected if the time management of the elution of the herbicidal component becomes possible. ing.

JP 2009-249358 A WO01 / 13722 publication Special table 2011-510957 gazette JP 2005-192458 A Japanese Patent Laid-Open No. 2014-070033 JP-A-2015-139390 Japanese Patent No. 3781487 JP-A-8-275620

Iron coating direct sowing manual 2010 (Agricultural and Food Industry Research Organization)

  However, the disease resistance inducer as described in Patent Document 5 is a drug having an action of suppressing the disease by inducing resistance of the plant itself against pathogenic bacteria ([0009] of Patent Document 5). For example, fungicides, insecticides, etc., which are treated on the seed itself to effect its effectiveness. Furthermore, [0026] of Patent Document 5 has a description that “the method of the present invention can be used in combination with pesticides such as insecticides and herbicides used in rice cultivation.” This means that pesticides such as insecticides and herbicides are used in combination when seeds treated with a disease resistance inducer are sowed. Therefore, the seeds coated with the herbicidal composition and the seeds coated with the herbicidal composition are not specifically known.

  In addition, herbicide-coated rice straw seeds as described in Patent Document 8 are used not only for herbicides but also for special interfaces such as water-soluble adhesive resins and water-insoluble adhesive resins, as well as expensive interfaces. Activators and inorganic auxiliaries are used in the coating solutions of the examples. Furthermore, the herbicide-coated rice straw seeds of any of the examples are superior in that they do not aggregate with each other, but unlike iron-coated seeds, the true specific gravity is not sufficiently heavy, so there is no floating seedling suppression effect, Since the prevention effect is unknown, it is not sufficient as seeds for direct seeding of rice.

  Therefore, until now, there is no known example of a practical seed preparation treated with a herbicidal composition by a simple treatment method. In particular, there is no specific description and examples of the weed control method including treating the seed with the herbicidal composition together with the iron coating.

  In the existing seed treatment, the essential mechanism of action is that the drug used is absorbed by the seed and its effect is exerted, or for the purpose of controlling pests in the environment close to the seed The drugs used for seed treatment have been limited to fungicides, insecticides and plant growth agents that are less likely to cause phytotoxicity. It is desirable that the herbicidal composition is not absorbed by the seeds to be treated, but selectively acts on the target weeds instead of the seeds. unknown. In addition, when treating the herbicidal composition on the seed, it is required that the agent to be treated is not absorbed by the seed but is quickly eluted out of the seed system such as in paddy water. Moreover, the risk of phytotoxicity to crop seeds of existing herbicidal compositions is extremely high. Therefore, according to the conventional seed treatment method, it is extremely difficult to put the seed treated with the herbicidal composition into practical use. Therefore, it is considered difficult to put into practical use a seed preparation that treats a herbicide together with an iron coating with the conventional technology. Furthermore, in the herbicide, since the herbicide treated with the seed is present at a high concentration in the vicinity of the seed, the occurrence of phytotoxicity to the crop itself related to the seed is also a big problem. In fact, even if a commercially available herbicidal composition was treated on existing iron-coated seeds, sufficient herbicidal effects were not obtained, and in some cases, it was normal to cause phytotoxicity in rice cultivation itself. From such a background, it has been difficult to put into practical use the treatment of the herbicide with iron-coated seeds and the weed control with the seed treated with the herbicide.

  An object of the present invention is to provide weeds, particularly paddy fields, in which the agrochemical component (herbicidal compound) of the herbicidal composition is quickly eluted and generated out of the seed system without causing phytotoxicity to the crops themselves, particularly paddy rice. In order to be able to control weeds in Japan, the concentration of the required amount of pesticide component is ensured for the necessary period, the method of treating the herbicidal composition on the seed by iron coating, the iron coating treated with the herbicidal composition It is to provide a seed treatment preparation and a weed control method characterized by sowing the seed preparation on the soil surface.

  As a result of intensive studies to solve the above problems, the inventors of the present invention have prepared a herbicidal composition that has been appropriately formulated before the iron powder oxidation reaction has stopped in the preparation process of the seed preparation by iron coating. The iron-coated seed preparation obtained by completing the seed treatment in the present invention surprisingly has a herbicidal composition as compared with the seed preparation in which the oxidation reaction is stopped and the iron-coated seed is treated with the herbicidal composition. The diffusion of the herbicidal component in water is greatly improved, practical herbicidal performance can be obtained, and the herbicidal component does not cause phytotoxicity to seeds and their growth, completing the present invention. did.

That is, the present invention is as follows [1]-[16].
[1]
1) Process of processing iron powder on seeds,
2) the step of treating the seed with the herbicidal composition; and 3) the step of stopping the oxidation reaction of the treated iron powder,
A method for producing an iron-coated seed formulation, wherein the steps 1) and 2) are performed before the step 3).
[2]
2) After carrying out the step of treating the seed with the herbicidal composition, 1) The method of producing according to [1], wherein the step of treating the seed with iron powder is carried out.
[3]
1) After carrying out the step of treating the iron powder on the seed and before the oxidation reaction of the iron powder stops, 2) carrying out the step of treating the seed with the herbicidal composition, according to [1] Manufacturing method.
[4]
The production method according to [1], wherein 1) the step of treating the seed with iron powder and 2) the step of treating the seed with the herbicidal composition are performed simultaneously.
[5]
The herbicidal composition comprises at least one herbicidal compound selected from the group consisting of (A1) a whitening-type herbicidal compound or salt thereof and (A2) an acetolactate synthase-inhibiting herbicidal compound or salt thereof. [1] The production method according to any one of [4].
[6]
(A1) Whitening type herbicidal compound is pyrazole herbicidal compound or salt thereof, triketone herbicidal compound or salt thereof and 6-chloro-3- (2-cyclopropyl-6-methylphenoxy) pyridazin-4-yl The production method according to [5], which is at least one selected from the group consisting of morpholine-4-carboxylate or a salt thereof.
[7]
(A2) The acetolactate synthase-inhibiting herbicidal compound is at least one selected from the group consisting of sulfonylurea herbicidal compounds or salts thereof and pyrimidinylsalicylic acid herbicidal compounds or salts thereof. Manufacturing method.
[8]
(A1) The whitening type herbicidal compound is at least one selected from the group consisting of pyrazolate and 6-chloro-3- (2-cyclopropyl-6-methylphenoxy) pyridazin-4-yl morpholine-4-carboxylate The production method according to [5] or [6].
[9]
(A1) The production method according to [5], [6] or [8], wherein the whitening type herbicidal compound is pyrazolate.
[10]
(A2) The production method according to [5] or [7], wherein the acetolactate synthase-inhibiting herbicidal compound is a sulfonylurea herbicidal compound or a salt thereof.
[11]
In the step of treating the seed with the herbicidal composition, in addition to treating the seed with the herbicidal composition, the seed is treated with at least one of an insecticidal composition, a bactericidal composition and a plant growth agent. [1] The production method according to any one of [10].
[12]
The production method according to any one of [1] to [11], wherein the seeds are paddy rice seeds.
[13]
An iron-coated seed preparation obtained by the production method according to any one of [1] to [12].
[14]
The iron-coated seed preparation according to [13], wherein the seed is a rice seed.
[15]
[13] A method for controlling weeds, comprising seeding the iron-coated seed preparation of [13] on a soil surface.
[16]
[14] A method for controlling weeds comprising seeding the iron-coated seed preparation of [14] on the surface of paddy soil.

A herbicidal effect is imparted by sowing a seed preparation prepared according to the method for preparing a seed preparation by iron coating of the present invention on the soil surface. In particular, in the case of paddy rice seeds, when the seeds are sown on the surface of the paddy field, the herbicidal active ingredient treated with the seeds can be rapidly eluted into water. Therefore, various weeds that are problematic in paddy fields, for example, Gramineae weeds such as Tainubie; Grassid weeds such as Azena and Abnome; It is possible to control ophyllidae weeds such as Urikawa, Omodaka and Heramodaka, and in addition, no harmful phytotoxicity is shown to the seeds. Moreover, since the herbicidal active ingredient can be treated simultaneously with the preparation of the iron-coated seed, part of the herbicide treatment in Honda can be omitted, which can contribute to the reduction of the control work amount.
Moreover, it is also possible to apply the preparation method of the seed formulation by iron coating of this invention to the seed which gave the heat processing etc. and suppressed germination.
Therefore, the preparation method of the seed formulation by iron coating and the prepared seed formulation treated with the herbicidal component of the present invention can reduce the labor required for weed control work.

Next, a method for producing a seed formulation by iron coating according to the first invention of the present application and a seed formulation by iron coating obtained by the production method according to the second invention will be described.
Each term used in the claims and specification of the present application is defined according to a definition generally used in the technical field unless otherwise specified.

  A seed formulation means a seed that has been formulated using a pesticide composition. Therefore, what treated the seed with the herbicidal composition together with the iron coating is an iron-coated seed formulation.

The preparation method of the seed formulation by iron coating of the present invention is as follows:
1) Process of processing iron powder on seeds,
2) the step of treating the seed with the herbicidal composition; and 3) the step of stopping the oxidation reaction of the treated iron powder,
Before step 3), step 1) and step 2) are performed.
As a seed treatment method in the seed treatment step of the above step 1) and step 2), a seed treatment technique known in the art, for example, a seed dressing method, a seed coating method, a seed dusting method, is within the scope of the present invention. In addition, a seed dipping method and a seed pelleting method can be used. Among them, it is preferable to use a seed coating method in both step 1) and step 2).

  As the seed coating method used in step 1) (preparation of seed preparation by iron coating) of the present invention, any method can be used as long as it is a method known in the art. For example, it is the method described in the iron coating flooded direct sowing manual 2010 (Agricultural / Food Industry Research Organization). More specifically, after the dried seeds are soaked at room temperature for 3 to 4 days, excess water is drained, and mixed with iron powder and calcined gypsum while adding water to the seeds to coat the seeds. Moreover, it can usually be powdered using a small amount of calcined gypsum as a finish. Next, the seed is allowed to stand for a certain period of time under conditions in which an oxidation reaction proceeds in the iron component of the coated seed, and iron hydroxide, that is, iron rust is formed on the seed. After the seed formulation is in a state where iron rust is formed on the coated seed and sufficient hardness is obtained, the seed is subjected to a drying step at a temperature of 40 ° C. or less that does not affect the germination of the seed, It is obtained by evaporating water on the seed surface to stop the oxidation reaction (step 3)). The time required for stopping the oxidation reaction varies depending on the temperature and humidity of the outside air, but it is desirable to leave it for one day or more.

Examples of the iron powder used in the present invention include reduced iron powder, atomized iron powder, electrolytic iron powder, and iron oxide powder, and a mixture of two or more of these may be used. In the present invention, it is preferable to use reduced iron powder, iron oxide powder, or a mixture of reduced iron powder and iron oxide powder. In addition, commercially available iron powder can be used. Specifically, for example, DSP317 iron powder (DOWA (made by IP) IP Co., Ltd.), agricultural iron powder (made by Daitetsu Kogyo), or agricultural iron powder (made by Tetsugen) can be used. The particle size of the iron powder may be powdery, preferably 10 to 100 μm, and the reduced iron powder preferably has a particle size of 100 μm or less. The calcined gypsum used as necessary may be powdered calcium sulfate 1/2 hydrate (CaSO ₄ 1/2 H ₂ O), and a commercially available product can be used.
The amount of iron powder used for the treatment is preferably 0.05 to 1.0 part by weight, and more preferably 0.2 to 0.5 part by weight with respect to 1 part by weight of the seed. The amount of calcined gypsum mixed with the iron powder is preferably 1 to 25% and more preferably 5 to 10% with respect to 100% of the iron powder. The amount of calcined gypsum used for finishing is preferably 0 to 10%, more preferably 0.1 to 5% with respect to 100% of the iron powder.

  In the present invention, water and oxygen are required for the oxidation reaction of the iron component of the coated seed. The water required for the oxidation reaction is supplied from the moisture contained in the seed by dipping the seed in advance, the moisture added during granulation of the iron-coated seed, or the moisture contained in the herbicidal composition itself or its diluted solution. The The oxygen necessary for the oxidation reaction is supplied from the atmosphere in the environment where iron coating is performed and oxygen contained in the water used. In general, it is said that the oxidation reaction is stopped when the thickness of the water layer on the iron surface is reduced, and when the relative humidity of the air is about 50% or less. It is necessary to control the moisture of the iron-coated seed by subjecting it to a drying process and reduce it as necessary. The oxidation reaction can be usually performed at room temperature by appropriately supplying water to the seed. In order to promote oxidation, the seed is subjected to a process of repeating hydration and drying, and the reaction proceeds usually by allowing the seed to stand for 3 to 7 days. This method is a preferable method for sensing heat generation due to the progress of the oxidation reaction.

  In the present invention, in the oxidation reaction of the iron component of the coated seed, the treated iron powder is oxidized to form iron hydroxide, that is, iron rust, and it is necessary to proceed the oxidation until the iron component is not missing from the seed. Whether the oxidation reaction is progressing or stopped can be confirmed and determined by observing the exothermic state of the seeds. That is, “stopping the oxidation reaction of the iron component” means, for example, that when the temperature of the seed is observed with a non-contact thermometer or the like, no change in the temperature of the seed is observed under normal temperature and 50% relative humidity conditions. is there. However, in the state where the formation of iron rust is insufficient, if the water content of the coated seed is high, the temperature change may not be observed due to the heat of vaporization. It is necessary to evaluate in a state where it is uniformly coated.

  In 1st invention of this application, before the oxidation reaction of the iron powder coated on the seed stops, the process (process 2) of treating the said seed with a herbicidal composition is implemented. As one aspect, after the seed is treated with the herbicidal composition (step 2)), the seed can be treated with iron powder (step 1)). As one aspect, after the seed is treated with iron powder (step 1)), the seed can be treated with the herbicidal composition before the oxidation reaction of the iron powder stops (step 2)). As one aspect, the step of treating the seed with iron powder (step 1)) and the step of treating the seed with the herbicidal composition (step 2)) can be carried out simultaneously. That is, the iron powder and the herbicidal composition can be treated simultaneously on the seed.

  As the seed coating method used in step 2) of the present invention, any method can be used as long as it is a method known in the art. For example, the seeds can be treated with the herbicidal composition by putting the seeds into a stirrer such as a mixer and then putting the herbicidal composition into the stirrer in a state where the seeds are fluidized and stirring at room temperature. The stirring time can be appropriately selected depending on the weight of the seeds to be added, but it is preferable that the treated seeds are usually allowed to stand at a stage where the coating becomes uniform in appearance.

  As a method of simultaneously carrying out Step 1) and Step 2), for example, after putting seeds into a stirrer such as a mixer, the seeds are allowed to flow and iron powder, and if necessary, calcined gypsum and herbicidal composition The mixture is put into a stirrer and stirred at room temperature to treat the herbicidal composition on the seed, or after the seed is put into a stirrer such as a mixer and the seed is allowed to flow, the herbicidal composition and A method of treating seeds with a herbicidal composition by alternately putting a mixture of iron powder and optionally calcined gypsum into a stirrer and stirring at room temperature is mentioned. The stirring time can be appropriately selected depending on the weight of the seeds to be added, but it is preferable that the treated seeds are usually allowed to stand at a stage where the coating becomes uniform in appearance.

  The herbicidal composition used in the present invention is based on an agrochemical active ingredient (herbicidal compound) which is an active ingredient, based on an agrochemical formulation technique known in the art within the scope of the present invention. Adjunct ingredients such as additives, disintegrants, wetting agents, dispersants, thickeners, antifoaming agents, antifungal agents, solvents, stabilizers, colorants, extenders, preservatives, and / or pH adjusters. Can be added.

  Examples of the binder used in the herbicidal composition of the present invention include, for example, dextrin, polyvinyl alcohol, polyvinyl pyrrolidone, carboxymethyl cellulose salt, methyl cellulose, gum arabic, polyethylene glycol or derivatives thereof, tab powder, bentonite, lignin sulfonate, Examples thereof include carboxylic acid or sulfonic acid type polysoap. Among these, lignin sulfonate or carboxylic acid or sulfonic acid type polysoap can be used as a dispersant and is suitable.

  The disintegrating agent, wetting agent, or dispersing agent used in the herbicidal composition of the present invention is not particularly limited as long as it is used for ordinary agricultural chemicals, and includes an anionic surfactant, a nonionic surfactant, a positive agent. Any surfactant such as an ionic surfactant or an amphoteric surfactant can be used, and one or more of these surfactants can be used.

  Examples of the anionic surfactant used in the herbicidal composition of the present invention include alkyl phosphate ester salt, alkyl sulfate ester salt, polyoxyalkylene alkyl ether phosphate ester salt, polyoxyethylene alkyl ether sulfate ester salt, and alkylaryl. Phosphate ester salt, alkylaryl sulfate ester salt, polyoxyalkylene alkylaryl ether phosphate ester salt, polyoxyalkylene alkylaryl ether sulfate ester salt, alkylphenol phosphate, alkylphenol phosphate ester salt, alkylphenol sulfate, alkylphenol sulfate ester salt, polyoxy Alkylene alkylphenol phosphate, polyoxyalkylene alkylphenol phosphate ester salt, polyoxyalkylene alkylphenol sulfate, Reoxyalkylene alkylphenol sulfate, styrylphenol phosphate, styrylphenol phosphate, styrylphenol sulfate, styrylphenol sulfate, polyoxyalkylene styrylphenol phosphate, polyoxyalkylene styrylphenol phosphate, polyoxyalkylene Styrylphenol sulfate, polyoxyalkylene styrylphenol sulfate, distyrylphenol phosphate, distyrylphenol phosphate, distyrylphenol sulfate, distyrylphenol sulfate, polyoxyalkylene distyrylphenol phosphate, poly Oxyalkylene distyrylphenol phosphate ester salt, polyoxyalkylene distyrylphenol sulfate, polyoxya Kirindistyrylphenol sulfate, tristyrylphenol phosphate, tristyrylphenol phosphate, tristyrylphenol sulfate, tristyrylphenol sulfate, polyoxyalkylene tristyrylphenol phosphate, polyoxyalkylene tristyrylphenol phosphate Ester salt, polyoxyalkylene tristyryl phenol sulfate, polyoxyalkylene tristyryl phenol sulfate ester, alkyl succinate sulfonate, dialkyl succinate sulfonate or polyoxyalkylene dialkyl succinate sulfonate, etc. Preferably, alkyl phosphate ester salt, polyoxyalkylene alkyl ether phosphate ester salt, alkylaryl phosphate ester salt, Alkylene alkyl phosphate ether salt, alkylphenol phosphate, styrylphenol phosphate ester, polyoxyalkylene styrylphenol phosphate salt, distyrylphenol phosphate, distyrylphenol phosphate salt, polyoxyalkylene distyrylphenol phosphate, Examples thereof include polyoxyalkylene distyryl phenol phosphate salt, tristyryl phenol phosphate, tristyryl phenol phosphate salt, polyoxyalkylene tristyryl phenol phosphate, and polyoxyalkylene tristyryl phenol phosphate salt.

  Examples of the nonionic surfactant used in the herbicidal composition of the present invention include aliphatic alcohol alkylene oxide adducts, polyalkyleneoxy fatty acid esters, sorbitan surfactants or alkylene oxide adducts thereof, and polyglycerin fatty acid esters. , Alkylpolysaccharide surfactants, sugar glycerides, polyoxyalkylene alkyl ethers, polyoxyethylene alkyl ethers, polyoxyalkylene alkyl aryl ethers, polyoxyalkylene alkyl phenol ethers, polyoxyalkylene styryl phenol ethers, polyoxyalkylene distyryls Phenol ether or polyoxyalkylene tristyryl phenol ether, and the like, preferably polyoxyalkylene alkyl Ether, polyoxyethylene alkyl ethers, polyoxyalkylene alkylaryl ethers, polyoxyalkylene alkylphenol ethers, polyoxyalkylene styryl phenol ether, polyoxyalkylene styryl phenol ether or polyoxyalkylene Rent squirrel styryl phenol ether and the like.

  In addition, in the surfactant of the type to which these ethylene oxides are added, propylene oxide may be contained in a part thereof.

  Examples of the cationic surfactant used in the herbicidal composition of the present invention include an aliphatic tertiary amine or a salt thereof, an aliphatic tertiary amine, an aliphatic amine alkylene oxide adduct or a salt thereof, or an aliphatic tertiary amine. And quaternary amine salts.

  Examples of the amphoteric surfactant used in the herbicidal composition of the present invention include amino acid-type amphoteric surfactants such as sodium laurylaminopropionate; betaine-type amphoteric surfactants such as lauryl dimethyl betaine, stearyl dimethyl betaine, and lauryl didihydroxyethyl betaine. Examples thereof include carboxylate-type amphoteric surfactants such as surfactants; sulfate ester-type amphoteric surfactants; sulfonate-type amphoteric surfactants; or phosphate ester-type amphoteric surfactants.

  The surfactant used in one embodiment of the herbicidal composition used in the present invention is preferably an anionic surfactant or a nonionic surfactant.

  The amount of the surfactant used in one embodiment of the herbicidal composition used in the present invention is usually 0.01 to 20% by weight in the herbicidal composition, preferably 0.1 to 10% by weight.

  The thickener used in the herbicidal composition of the present invention is not particularly limited as long as it is usually used in agrochemical formulations. For example, white carbon, aluminosilicate, bentonite, montmorillonite, hectorite, attapulgite and the like. Minerals or gum thickeners such as gum arabic, tragacanth gum, xanthan gum, guar gum, roast bean gum, casein, alginic acid, cellulosic polysaccharides, ethyl cellulose, polyvinyl alcohol, carboxymethyl cellulose, hydroxyethyl cellulose, hydroxypropyl cellulose, carboxymethyl cellulose Among them, preferred are polymer thickeners, and more preferred is xanthan gum.

  The antifoaming agent used in the herbicidal composition of the present invention is not particularly limited as long as it is usually used in agricultural chemical preparations. For example, lower alcohols such as methanol, ethanol, isopropanol, sec-butanol and butanol are used. Antifoaming agent; amyl alcohol, diisobutyl carbitol, tributyl phosphate, oleic acid, tall oil, metal soap, low HLB surfactant (for example, sorbitan lauric acid monoester, sorbitan lauric acid triester, polyethylene glycol fatty acid ester, Acetylene glycol derivatives, pluronic-type nonionic surfactants, etc.), organic polar compound antifoaming agents such as acetylene glycol derivatives; mineral oil surfactant blends, mineral oil and fatty acid metal salt surfactant blends Like mineral oil defoamer Silicone resins, silicone resins surfactant mixed product, and the like silicone resin-based antifoaming agents such as inorganic powders mixed product of a silicone resin.

  The antifungal agent used in the herbicidal composition of the present invention is not particularly limited as long as it is usually used in an agricultural chemical formulation. For example, parachlorometaxylenol, polyhexamethylene biguanide hydrochloride, 1, 2-Benzisothiazoline-3-one, methyl parahydroxybenzoate, ethyl parahydroxybenzoate, propyl parahydroxybenzoate, butyl parahydroxybenzoate, heptyl parahydroxybenzoate, benzyl parahydroxybenzoate, paraoxybenzoate, sorbic acid, orthophenyl Phenol, sodium orthophenylphenate, glutardialdehyde, quaternary ammonium compound, tri- (N-chlorohexyldiazeniumdioxy) -aluminum, tetrahydro-3,5- Methyl-2H-1,3,5-thiadiazine-2-thione, 2,5-dimethoxytetrahydrofuran, dimethylolurea, sodium N-methyldithiocarbamate, phenoxyethanol, glyoxal, glutaraldehyde, 1,3,5-tris (2- Hydroxyethyl) -1,3,5-hexahydrotriazine, benzalkonium chloride, phenoxypropanol, tetramethylacetylene urea, povidone iodine, potassium sorbate, 2-bromo-2-nitropropane-1,3-diol Or thiazolone etc. are mentioned.

  The solvent used in the herbicidal composition of the present invention is not particularly limited as long as it is usually used for agricultural chemicals, but a solvent having a flash point of 2nd petroleum or higher is desirable. For example, alkylbenzene, methylnaphthalene, liquid paraffin, ligroin, kerosene, kerosene, n-decane, isododecane, tetralin, decalin, turpentine oil, pine oil, adipic acid, gluconic acid, maleic acid, lactic acid, benzoic acid, phthalic acid, apple Acid, fumaric acid, succinic acid, tartaric acid, citric acid, lauric acid, oleic acid, palm oil fatty acid, cyclohexanone, cyclohexenylcyclohexanone, acetylacetone, acetophenone, methylbutylketone, ethylene glycol, diethylene glycol, triethylene glycol, propylene Glycol, dipropylene glycol, tripropylene glycol, epichlorhydrin, diglycidyl ether, dioxane, triethyl phosphate, tributyl phosphate, soybean oil, rapeseed oil, sesame , Rice oil, coconut oil, sunflower oil, sardine oil, whale oil, dimethylsulfoxide, N, N- dimethyl acetamide or N- methylpyrrolidone.

  The colorant used in the herbicidal composition of the present invention is not particularly limited as long as it is usually used for agricultural chemicals, and examples thereof include pigments, and preferably brilliant blue FCF, cyanine green G, or erio green G. It is. The amount of the colorant used is usually 0.05 to 0.5% by weight, preferably 0.1 to 0.3% by weight in the granular agrochemical composition.

  Examples of the bulking agent used in the herbicidal composition of the present invention include fine mineral powders generally used as a carrier for agricultural chemicals such as bentonite, talc, clay, diatomaceous earth, amorphous silicon dioxide, calcium carbonate, and magnesium carbonate. In addition, resin powders such as vinyl chloride, chlorinated polyethylene, chlorinated polypropylene, sugars such as glucose, sugar, lactose, carboxymethylcellulose or salts thereof, starch or derivatives thereof, microcrystalline cellulose, wood flour, rice bran, bran, rice husk Examples thereof include organic substances such as powder, coffee bean powder, cellulose powder and licorice powder, water-soluble inorganic salts such as sodium sulfate, ammonium sulfate and potassium chloride, and urea. Examples of the bentonite include bentonite Hotaka, Fuji (manufactured by Hojun Co.), Kunigel V1, V2 (manufactured by Kunimine Kogyo Co., Ltd.), bentonite KG-1, and KA-1 (manufactured by Nippon Bentonite Co., Ltd.). The compounding amount of the extender is a necessary minimum amount excluding essential components of the herbicidal composition of the present invention, and varies depending on the type of the extender, but is usually 0.1 to 90 wt.% In the herbicidal composition. %, Preferably 0.5 to 70% by weight.

  The preservative used in the herbicidal composition of the present invention is not particularly limited as long as it is usually used in agricultural chemicals, and preferably sorbic acid, potassium sorbate, parachlorometaxylenol, paraoxybenzoic acid. Butyl or sodium dehydroacetate. The amount of the preservative used is usually 0.1 to 3% by weight, preferably 0.2 to 2% by weight in the herbicidal agrochemical composition.

  The pH adjuster used in the herbicidal composition of the present invention is not particularly limited as long as it is usually used in agricultural chemicals. For example, inorganic acids such as hydrochloric acid and phosphoric acid; citric acid, phthalic acid, and succinic acid Organic acids such as: sodium citrate, organic metal salts such as potassium hydrogen phthalate; disodium hydrogen phosphate, sodium dihydrogen phosphate, dipotassium hydrogen phosphate, potassium dihydrogen phosphate, sodium carbonate, potassium carbonate, Examples thereof include inorganic metal salts such as sodium borate; hydroxides such as sodium hydroxide and potassium hydroxide; and organic amines such as triethanolamine. Preferred are inorganic acids and inorganic metals. A salt or hydroxide, and more preferably hydrochloric acid, citric acid, succinic acid, sodium hydroxide, potassium hydroxide or sodium carbonate. Moreover, the pH adjuster used can use 1 type (s) or 2 or more types together.

The herbicidal composition of the present invention can be prepared by a known formulation process such as mixing, granulation, pulverization, and drying, which is used for the production of ordinary agricultural chemical formulations. In addition, the herbicidal composition can be used in a state of being preliminarily mixed with an oxidation accelerator such as iron powder or calcined gypsum which is a material related to iron coating. In this case, the herbicidal composition used in the method for producing a seed preparation by iron coating according to the present invention is a herbicidal compound, as long as the drug can be uniformly treated on the seed without inhibiting the iron coating on the seed However, it is usually necessary to formulate it into an appropriate formulation type. Suitable formulation types and formulation methods for the herbicidal composition include the following (1) to (9), and the herbicidal composition is finely divided by wet or dry grinding, or is aqueous or It is necessary to mold so that seeds can be uniformly coated by dissolving in an oily solvent. However, even if it is a formulation type and formulation method other than these, it can be used for this invention, if the favorable coating | cover to the seed of a chemical | medical agent can be ensured.
(1) An aqueous dispersion obtained by wet-grinding an active ingredient of herbicidal agricultural chemicals in water and adding an auxiliary component such as a surfactant as necessary,
(2) An oily dispersion obtained by wet-grinding herbicidal agrochemical active ingredients in a nonpolar solvent and adding an auxiliary component such as a surfactant, if necessary,
(3) Bulk powder obtained by dry-grinding herbicidal agrochemical active ingredients together with auxiliary components such as surfactants as necessary,
(4) An aqueous dispersion obtained by dispersing the bulk powder obtained in (3) in water together with an auxiliary component such as a surfactant, if necessary,
(5) An oily dispersion obtained by dispersing the bulk powder obtained in (3) in a nonpolar solvent together with an auxiliary component such as a surfactant, if necessary,
(6) A liquid agent obtained by dissolving an active ingredient of herbicidal agricultural chemicals with water and, if necessary, an auxiliary component such as a surfactant,
(7) An emulsion obtained by dissolving a herbicidal agrochemical active ingredient in a nonpolar solvent by adding an emulsifier and, if necessary, an auxiliary ingredient such as a surfactant,
(8) Bulk powder obtained by dry-grinding a granular herbicidal composition,
(9) A liquid composition obtained by dispersing and dissolving a granular herbicidal composition in water or in a nonpolar solvent with an auxiliary component such as a surfactant added as necessary.

In the present invention, a method for producing a seed preparation by iron coating can be applied to seeds of any variety. Examples of seeds to which the present technology can be applied include paddy rice, wheat, barley, soybean, corn, sugar beet, and the like. Preferably, what is sown in a flooded state is preferable, and paddy rice is particularly preferable. However, it is preferable to use rice seeds of a variety that does not have sensitivity to the herbicidal composition. In the present invention, “not sensitive” means that no phytotoxicity occurs in the treatment of the drug in a flooded state in normal transplantation cultivation.
It is clear to those skilled in the art which varieties of paddy rice seeds are not sensitive to herbicidal compositions, but examples of varieties of rice seeds that are not sensitive to herbicidal compositions include Koshihikari. , Hinohikari, Hitomebore, Akitakomachi, Kinuhikari, Nanatsuboshi, Haenuki, Kirara 397, Masashigura, Tsugaru Romance, Nipponbare. Also, rice seeds that are not sensitive to PPO-inhibiting herbicidal compounds and VLCFAE-inhibiting herbicidal compounds, such as Koshihikari, Hinohikari, Hitomebore, Akitakomachi, Kinuhikari, etc. can be preferably used.
On the other hand, examples of rice seeds of varieties that are sensitive to the herbicidal composition include Habataki, Takanari, Momomiman, Mizuhochikara, Luriaoba, and Surprise mochi that are sensitive to mesotrione and benzobicyclon. . Paddy rice seeds sensitive to these herbicidal compositions are described in, for example, “Japanese Crop Science Society No. 79 (Another 1)”.

  As the paddy rice seed used in the present invention, a seed in a state where it can be sown can be used. Moreover, the seed formulation by iron coating used in this invention can use calcium peroxide, a molybdenum compound, etc. simultaneously with iron powder as a coating agent.

  The herbicidal composition used in the present invention contains any herbicidal compound usually used in paddy fields as an active ingredient. As such herbicidal compounds, (A1) whitening type herbicidal compounds, (A2) acetolactate synthase (hereinafter referred to as ALS) inhibitory herbicidal compounds, (A3) protoporphyrinogen oxidase (hereinafter referred to as PPO) Inhibitory herbicidal compounds and (A4) very long chain fatty acid elongation enzymes (hereinafter referred to as VLCFAE) inhibitory herbicidal compounds are widely known and can be used in the present invention. Among these, it is preferable to include at least one selected from the group consisting of (A1) a whitening herbicidal compound or a salt thereof and (A2) an ALS-inhibiting herbicidal compound or a salt thereof. Hereinafter, these herbicidal compounds will be described, and these herbicidal compounds include their salt forms.

で表される６−クロロ−３−（２−シクロプロピル−６−メチルフェノキシ）ピリダジン−４−イル モルホリン−４−カルボキシレート（以下、化合物（Ｉ）ともいう）などが挙げられる。(A1) A whitening-type herbicidal compound is a well-known herbicide that whitens weeds and kills them. As the whitening type herbicidal compound in the present invention, for example, pyrazole type herbicidal active compound, triketone type herbicidal active compound, clomazone (CAS No. 81777-89-1), or the following general formula (I):

And 6-chloro-3- (2-cyclopropyl-6-methylphenoxy) pyridazin-4-yl morpholine-4-carboxylate (hereinafter, also referred to as compound (I)).

Examples of the pyrazole-based herbicidal active compound include pyrazolate, pyrazoxifene, and benzophenap, and are described in The Pesticide Manual 13th Edition, pages 844-845, 848-849, and 81, respectively. These compounds belong to the F2 group of the HRAC classification system.
Examples of the triketone herbicidal active compound include mesotrione, sulcotrione, benzobicyclone, tefryltrione, bicyclopyrone, and the like, described in The Pesticide Manual 13th Edition, 631-632, 908-909, page 80, respectively. Has been. These compounds belong to the F2 group of the HRAC classification system. Tefryltrione (CAS No. 473278-76-1) and bicyclopyrone (CAS No. 352010-68-5) are also triketone herbicidal compounds.

Chromazone belongs to the F4 group of the HRAC classification system.
(A2) An ALS-inhibiting herbicidal compound is a well-known herbicidal compound that inhibits the synthesis of valine, leucine, and isoleucine, which are essential amino acids, by inhibiting ALS and kills weeds. Examples of the ALS-inhibiting herbicidal compound include sulfonylurea herbicidal compounds, pyrimidinyl salicylic acid herbicidal compounds, and triazolopyrimidine herbicidal compounds. These compounds belong to group B of the HRAC classification system.

  Examples of the sulfonylurea herbicidal compound include azimusulfuron, bensulfuron methyl, cyclosulfamuron, halosulfuron methyl, ethoxysulfuron, imazosulfuron, pyrazosulfuron ethyl, chlorimuron ethyl, synosulfuron, metsulfuron methyl, fulcetos. Examples include ruflon, propyrisulfuron, and metazosulfuron. The Pesticide Manual 13th Edition, 46-47, 73-74, 222-223, 523-524, 386-387, 560-561, 847-848, 161-, respectively. 162, 184-185, 677-678. In addition, flucetosulfuron (CAS No. 412928-75-7), propyrisulfuron (CAS No. 570415-88-2), methazosulfuron (CAS No. 868680-84-6) and the like are also sulfonylurea herbicidal compounds. is there.

  Examples of the pyrimidinyl salicylic acid-based herbicidal compound include bispyribac, pyribenzoxime, pyriftalide, pyriminobacmethyl, pyrimisulfurphan, and triafamon. The Pesticide Manual 13th Edition, 96-97, 852-853, and 860-861, respectively. 863-864. Pyrimisulphan (CAS No. 221205-90-9) and triafamon (CAS No. 874195-61-6) are also pyrimidinyl salicylic acid herbicidal compounds.

Triazolopyrimidine herbicidal compounds include, for example, penox slam and are described in The Pesticide Manual 13th Edition, pages 753-754.
(A3) A PPO-inhibiting herbicidal compound is a well-known herbicidal compound that inhibits PPO and causes browning symptoms to kill weeds. Examples of PPO-inhibiting herbicidal compounds are oxadialgyl, oxadiazone, pentoxazone, and the like, which are described in The Pesticide Manual 13th Edition at pages 725-726, 727-728, and 757-758, respectively.

  (A4) VLCFAE-inhibiting herbicidal compounds are well-known herbicidal compounds that inhibit VLCFAE, inhibit fatty acid synthesis, and kill weeds. Examples of VLCFA-inhibiting herbicidal compounds are butachlor, pretilachlor, tenylchlor, mefenacet and the like, and are described in The Pesticide Manual 13th Edition, pages 118-120, 799-800, 956, 621-622, respectively.

  Regarding the prescribed action mechanism and classification of these herbicidal compound groups, for example, “2012 paddy rice related herbicide test application spelling (test plan and drug characteristics)” (Japan Plant Regulatory Research Association) , “HRAC (Herbidide Resistance Action Committee), accelerating to HRAC classification on mode of action”.

The concentration of the herbicidal compound in the herbicidal composition can be appropriately determined depending on the type of herbicidal compound and the formulation form used.
In the treatment of seeds in step 2), the amount of the herbicidal composition can be appropriately determined according to the type of herbicidal compound and the formulation form of the herbicidal composition. For example, the treatment amount of the herbicidal composition can be determined so that 0.01 g to 3000 g, preferably 0.1 g to 1000 g, is treated as a herbicidal compound as an active ingredient per 1 kg of seeds.

  In the method for preparing a seed preparation by iron coating of the present invention, the herbicidal composition may be treated alone on the seed, and a fungicide, insecticide, acaricide, nematicide, safener or plant growth agent May be processed simultaneously. Examples of the bactericides to be treated simultaneously include, but are not limited to, for example, strobilurin compounds, anilinopyrimidine compounds, azole compounds, dithiocarbamate compounds, phenyl carbamate compounds, organochlorine compounds, benzimidazole compounds, Phenylamide compounds, sulfenic acid compounds, copper compounds, isoxazole compounds, organophosphorus compounds, N-halogenothioalkyl compounds, carboxyanilide compounds, morpholine compounds, organotin compounds or cyanopyrrole compounds And can be used alone or in combination. Examples of insecticides, acaricides and nematicides include, but are not limited to, pyrethroid compounds, organophosphorus compounds, oxime carbamate compounds, carbamate compounds, neonicotinoid compounds, diacylhydrazine compounds Compounds, benzoyl urea compounds, juvenile hormone compounds, cyclodiene organochlorine compounds, 2-dimethylaminopropane-1,3-dithiol compounds, amidine compounds, phenylpyrazole compounds, organotin compounds, METI compounds Benzylate compounds, allylpyrrole compounds, dinitrophenol compounds, anthranyl diamide compounds, oxadiazine compounds, semicarbazone compounds, tetronic acid compounds, carbamoyltriazole compounds or tetrazine compounds You can gel, can be used in combination one or more.

Specific examples include the following compounds.
That is, azoxystrobin, cresoxime-methyl, trifloxystrobin, methinostrobin, oryastrobine, piroclostrobin (pibrostrobin) ) And other anilinopyrimidine compounds such as mepanipyrim, pyrimethanil and cyprodinil; triadimefon, bittertanol and triflumizol izole), metconazole, propiconazole, penconazole, flusilazole, microbutanol, cyproconazole, cyproconazole, cyproconazole, cyproconazole, cyproconazole. (Prochloraz), simeconazole, fenarimol, imazalil, epoxiconazole, prothioconazole, ipconazole, ipconazole Azole compounds such as pefurazoate; Quinoxaline compounds such as quinomethionate; Manneb, zineb, mancozeb, polycarbamate, roprobine, roprobine, roprobine p Dithiocarbamate compounds such as diethofencarb; phenylcarbamate compounds such as dietofencarb; organochlorine compounds such as chlorothalonil and quintozene; benomyl, thiophanatemethyl benzimidazole compounds such as dazole); metalaxyl, metalaxyl-M, oxadixyl, ofurase, benalaxyl, furaproyl, furaxyl Amido compounds; Sulfenic acid compounds such as dichlorfluanid; Copper compounds such as copper hydroxide and oxyquinoline copper; Hydroxyisoxazole and the like Isoxazole compounds; fosetyl-aluminum , Organophosphorus compounds such as tolcrofos-methyl; N-halogenoalkyl compounds such as captan, captaphor, folpet; procymidone, iprodione Dicarboxolinic compounds such as vinclozolin; flutolanil, mepronil, furametopyr, thifluzamide, boscalido, pentocyradoid, pentiopyramide fluopyram), Carboxyanilide p-type compounds such as sedaxane, bixafen, penflufen, floxapyroxad, isopyrazam, benzovindiflupyr-form, and other compounds; Morpholine compounds such as dimethylmorph; organotin compounds such as triphenyltin hydroxide and triphenyltin acetate; cyanopyrrole compounds such as fludioxonil and fenpiclonil ; Other tricycles Tricylazole, pyroquilon, carpropamid, diclocymet, fenoxanil, fthalide, fluoxinyl, fluoxinil, t pyrifenox, fenpropidin, pencyclone, ferimzone, cyazofamid, amisulbrom, iprovalibal carb, iprovalical carb icarb-isopropyl, iminoctadin-albesylate, cyflufenamid, kasugamycin, validamycin, isoprothioloxyne, isoprothioloxyne (Tebufloquin), probenazole, thiadinyl, isothianil, tolprocarb, MIF-1002, and the like, acrinathrin, allethrin (al letrin) [(1R) -isomer], bifenthrin, bioalleslin, bioareslin S-cyclopentenyl isomer (fluor) cythroyl, thiomethrin, biorethrin. cyfluthrin, beta-cyfluthrin, cyhalothrin, gamma-cyhalothrin, lambda-cyhalothrin, cypermethrin th c alpha-cypermethrin, beta-cypermethrin, seta-cypermethrin, zeta-cypermethrin, zephenotrin [(1R) -c-trans-isomer 1R) -trans-isomer]), deltamethrin, empentrin [(EZ)-(1R) -isomer] (empentrin [(EZ)-(1R) -isomer]), esfenvalerate, ethophene Profenproxrin, fenpropatorin, fenvalerate (fe nvalerate, flucitrinate, flumethrin, tau-fluvalinate, halfenprox, imiprothrin, methothrin, methothrin ), Phenothrin [(1R) -trans-isomer] (phenothrin [(1R) -trans-isomer]), praretrin, resmethrin, RU15525 (cadetrin), silafluofen fluteline tefluthrin), tetramethrin (tetramethrin), tetramethrin [(1R) -isomer] (tetramethrin [(1R) -isomer]), tralomethrin (transfluthrin), ZXI8901, biopermethrin, thimethrin ), Profluthrin, flubrocitrinate, dimefluthrin, and other pyrethroid compounds, or various isomers thereof: acephate, azamethiphos, azinphos-methyl (z) -Methyl), azinephos-ethyl, cadusafos, chlorethoxyphos, chlorfenvinphos, chlormefophos, chlorpyrifos (chlormethylphos) ), Coumaphos, CYAP (cyanophos), demeton-S-methyl, diazinon, ECP (diclofenthion), DDVP (dichlorphos, dichlorvos) (Dicr otophos), dimethoate, dimethylvinphos, disulfoton (ethylthiomethone) (disulfoton), EPN (O-ethyl O-4-nitrophenyl) phenylphosphonothioate (O-ethyl O-4-nitrophenylphenyl) , Ethion, ethoprophos, famfur, fenamiphos, MEP (fenitrothion), MPP (fenthion), phostiazate, phosthiazate Thiol (isofenphos-methyl), isocarbophos (Isocarbophos) (isopropyl O- (methoxyaminothio = phosphoryl) salicylate), isoxathion (maloxamion), mecarbam (mecarbam), methamidophos (methamidthiomethothiothimethothithiothithiothithiothithiothithiothithiothithiothithiothithiothithiothithiothithiothimethothithiothithiothimethothithiothithiothithiothithiothithiothithiothiphos )), Mevinphos, monocrotophos, BRP (naled), ometoate, oxydemeton-methyl, parathion, parathion-methyl, thalion-methyl PA (Phenthoate (phenthoate)), phorate (phorate), phosalone (phosalone), phosmet (phosmet), phosphamidon (phosphamidon), phoxim (ph
oxim, pirimiphos-methyl, profenofos, propetanephos, prothiofos, pyrachlorphos, pyridafenthion, pyridafenthion, pyridafenthion ), Temephos, terbufos, thiomethon, triazophos, DEP (trichlorfon), bamidithione, Bayer 22/190 (chlorthion) ), bromfenvinfos, bromophos, bromophos-ethyl, butathiofos, carbophenothion, chlorophosphine, chlorophosphine, chlorophosphine diamidfos), CVMP (tetrachlorvinphos), propaphos, mesulfenfos, dioxabenzofos (salithione), etrimfos, oxydeprophos, xoxyprophos Formothion, fensulfothion, isazofos, imicyafos (AKD3088), isamifos, thionazine, phosphocarine Oxime carbamate compounds such as (alanycarb), butocarboxim, butoxycarboxim, thiodicarb, thiophanox, aldicarb, aldicarb ), Benfurcarb, NAC (carbaryl), carbofuran, carbosulfan, etiofencarb, thio (f) carb, thio, MIPC (isoprocarb), methiocarb, mesomyl, oxamyl, pirimicarb, PHC (propoxyl), trimetacarb (trimethylx) lcarbamate, allyxycarb, aldoxycarb, bufencarb, butacarb, carbanolate, MTMC (metalloxy), MCyl Carbamate compounds such as fenothiocarb and bendiocarb; acetamiprid, clothianidin, dinotefuran, imidacloprid, iticloprid, iticlopirid Clonicoid, thiamethoxam and other neonicotinoid compounds; chromafenozide, halofenozide, fluphenodil, fludetrione, and tebufenozine Chlorfluazuron, diflubenzuron, flucycloxuron, flufenoxuron, hexaflumuron, lufenuron, novallon benzoylurea compounds such as ron), noviflumuron, teflubenzuron, triflumuron; phenoxycarb, renepre, quinoprene, quinoprene ), Etc .; cyclodiene organochlorine compounds such as chlordane, endosulfan, lindane (gamma-HCH), dienochlor; Cartap hydrochloride, Cartap hydrochloride Thio 2-dimethylaminopropane-1,3-dithiol compounds such as thiocyclam; amidine compounds such as amitraz; phenylpyrazoles such as etiprole, fipronil and acetoprole Compounds: Organotin compounds such as azocyclotin, cyhexatin, phenbutatin oxide, fenazaquin, fenpyroximate, pyridaben, pyridaben, pyridaben Tebufenpyrad METI compounds such as npyrad and tolfenpyrad; benzylate compounds such as bromopropyrate; allyl pyrrole compounds such as chlorfenapyr; DNOC, binapacryl nitro diphenol; Anthranyl diamide compounds such as lantraniliprole and cyantraniliprole; Oxadiazine compounds such as indoxacarb; semicarbodiene compounds such as metaflumizone; tetronic acid compounds such as fen), spiromesifen and spirotetramat; carbamoyltriazole compounds such as triazamate; tetrazine compounds such as difluvidazine; abamectin, abamectin Benzoate (emectectin benzoate), milbemectin (milbemectin), lepimectin (lepimectin), acequinosyl (acequinocyl), azadirachtin (benzadifenate), benzuxinabate (z) Feprofine (buprofezin), CGA-50439, quinomethionate, clofentezine, cryolite, cyromazine, dazomet, DCIP, enth -D (1,3-dichloropropene), dicophor, dicyclanyl, dinobuton, dinocap, ENT 8184, etoxazole, lonicamide f , Fluacrylpyrim, Flubendamide, GY-81 (peroxocarbonate), hexythiazox, hydramethylnon, methyl iodide, caranjin, MB-599 (verm) ), Methoxychlor, methyl isothiocyanate, pentachlorophenol, phosphine, piperonyl butoxide, polynactin complex (proB), polynactin complex (proB) rgite)), pymetrozine, pyrethrins, pyridalyl, rotenone, S421 (bis (2,3,3,3-tetrachloropropyl) ether), sabadilla, spinosad ( spinosad, spinetoram, sulcofuron salt (sulcofuron-sodium), sulfluramide, tetradifon, thiosultap, tribufosdi, tribufosdi, tribufosdi Amide thioate (amidothioa) te), aminocarb, amiton, aramite, atidathion, azotoate, polysulfide barium, Bayer 21408, z , 3-benzodioxol-5-yl) -3-hexylcyclohex-2-enone, 1,1-bis (4-chlorophenyl) -2-ethoxyethanol, butonate, butopyronoxyl, 2 -(2-butoxyethoxy) ethyl thiocyanate, camphechlor, chlorbenside (chl) orbendide, chlordecone, chlordiform, chlorfenethol, chlorfenson, isoprothiolone, fluazuronate, fluazuronate, fluazuronate , Fluazinam, bialaphos, benomyl, levamisole hydrochloride, pyrifluquinazone, cyflumetofen, amidoflumet IKA-2005, Shienopirafen (cyenopyrafen) (NC512), sulfo hexa Flor (sulfoxaflor), pyrafluprole (pyrafluprole) (V3039), Piripu
Pyroprole (V3086), tralopyril (flupyrazofos), diophenolan, chlorbenzilate, flufenzine (flufenzine), flufenzine (flufenzine), benzomate (benfene) , Albendazole, oxybendazole, fenbendazole, metam-sodium, 1,3-dichloropropene, flupiradiflon (Flupyradifurone), aphidopyropene, flometoquin, piflubumide, fluensulfone, and IKI-3106, and insecticides, acaricides or nematicides.

  Examples of the safener that can be simultaneously treated include, but are not limited to, for example, benoxacor, furilazole, dichlormid, dicyclonon, DKA-24 (N1, N2−). Diallyl-N2-dichloroacetylglycinamide), AD-67 (4-dichloroacetyl-1-oxa-4-azaspiro [4.5] decane), PPG-1292 (2,2-dichloro-N- (1,3 -Dioxane-2-ylmethyl) -N- (2-propenyl) acetamide), R-29148 (3-dichloroacetyl-2,2,5-trimethyl-1,3-oxazolidine), croquint set-mexyl (cloquintet- mexyl), naphthalic acid Water (1,8-Naphthalic Anhydride), Mefenpyr-diethyl, Mefenpyr, Mefenpyr-ethyl, Fenchlorazole-ethyl (fenchlorazole-ethyl) MG-191 (2-dichloromethyl-2-methyl-1,3-dioxane), ciomethrinil, flurazole, fluxofenim, isoxadifen, isoxadifen-ethyl, isoxadifen-ethyl Daimuron, oxabetrinyl (oxabet) rinil), cyprosulfamide lower alkyl-substituted benzoic acid, cumyluron or TI-35 (1-dichloroacetylazepane), etc., and one or more may be used in combination Can do.

Examples of the plant growth agent to be treated at the same time include maleic hydrazide or a salt thereof, abscisic acid, calcium peroxide, inabenfide, paclobutrazol, uniconazole, tripentenol, and psychocell.
As described above, the seed formulation by iron coating that is subjected to the drying process and obtained by stopping the oxidation reaction by evaporating the moisture on the seed surface is in accordance with the storage method of the crop seed used as a raw material, It can be saved in the usual way. For example, the seedling box can be laid flat and stored using a nursery shelf, a container for transporting seedlings, etc. so as not to accumulate heat. Of course, the seed preparation can be stored in a degassed sealed container, sealed packaging, or a sealed container replaced with nitrogen, for example, so as not to be affected by air oxidation.

Next, the weed control method using the seed formulation by iron coating which is 3rd invention of this application is demonstrated.
The seed formulation by iron coating treated with the herbicidal composition of the present invention can be sown by a general cultivation method according to the type of crop, as with untreated seeds. Since the herbicidal composition is treated, it is not usually necessary to spray other herbicides, but the growth state of the crop can be confirmed and used in combination with other herbicides as necessary. The seed preparation can be sown on a flooded land even on the soil surface. In particular, paddy rice seeds may be sown in a flooded state on the surface of a paddy field, or may be sown after seeding in a flooded state.

  Hereinafter, formulation examples of the herbicidal composition used in the present invention and test examples for controlling weeds are shown and described in detail, but the present invention is not limited thereto. In the following formulation examples, “%” indicates mass%.

Formulation Example 1
Pyrazolate base (purity 93.7%) (64.0 parts by mass), New Coal ^TM 291PG (manufactured by Nippon Emulsifier Co., Ltd., 1.0 part by mass), KP-1436 (dispersant for agricultural chemicals; manufactured by Kao Corporation, 1.0 part by mass) and tap water (34.0 parts by mass) are mixed and wet-pulverized by Attritor 1S type (Mitsui Metal Mining Co., Ltd.) to obtain a pyrazolate slurry (agrochemical active ingredient amount 60.0%). It was.

Formulation Example 2
Compound (I) (40.0 parts by mass), New Coal ^TM 291PG (manufactured by Nippon Emulsifier Co., Ltd., 1.0 parts by mass), KP-1436 (manufactured by Kao Corporation, 1.0 parts by mass) and tap water (58 0.0 parts by mass) was mixed and wet pulverized with Atlite 1S type (Mitsui Metal Mining Co., Ltd.) to obtain a compound (I) slurry (agrochemical active ingredient amount 40.0%).

Example 1
After 100 g of dried rice seed (variety: Koshihikari) was soaked in water at room temperature for 12 hours, the water was sufficiently drained to obtain wet rice seed. After all the wet seeds were put into a bread mixer (ASONE DPZ-01 type), 8.0 g of the pyrazolate slurry of Formulation Example 1 was treated while rotating the bread at a speed at which the seeds flowed. Next, 77 g of a mixture of iron powder and calcined gypsum (mixing ratio 10: 1) is put in a pan while adding about 8 g of tap water, and the seeds are powdered, and the mixture of iron powder and calcined gypsum is uniformly powdered on the seeds. After being coated, 3.5 g of calcined gypsum was further added and powdered. The obtained seed was dried at room temperature for 7 days to stop the oxidation reaction of the treated iron powder, thereby obtaining an iron-coated seed formulation coated with pyrazolate. In addition, a powder dress means here that each said component adheres to the seed surface in the state of a powder.

Example 2
After 100 g of dried rice seed (variety: Koshihikari) was soaked in water at room temperature for 12 hours, the water was sufficiently drained to obtain wet rice seed. After the whole amount of the wet seeds was put into a bread mixer (ASONE DPZ-01 type), 8.0 g of the pyrazolate slurry of Formulation Example 1, iron powder and calcined gypsum (mixed) while rotating the bread at a speed at which the seeds flowed Ratio 10: 1) One-tenth of 77 g was alternately put into a pan while adding about 8 g of tap water, and the seeds were dressed. Finally, 3.5 g of calcined gypsum was further added and dressed. The obtained seeds were dried at room temperature for 5 days to stop the oxidation reaction of the treated iron powder, thereby obtaining an iron-coated seed formulation coated with pyrazolate.

Example 3
After 100 g of dried rice seed (variety: Koshihikari) was soaked in water at room temperature for 12 hours, the water was sufficiently drained to obtain wet rice seed. After putting all the wet seeds into a bread mixer (ASONE DPZ-01 type), the mixture of iron powder and calcined gypsum while dripping tap water with about 8 g pipette while rotating the bread at a speed at which the seeds flow. (Mixing ratio 10: 1) was put in 77 g bread and dressed on seeds. After the mixture of iron powder and calcined gypsum was uniformly coated on the seeds, 3.5 g of calcined gypsum was further added. The process of supplying moisture to the obtained seed at room temperature and drying the seed was repeated for about 7 days. The obtained iron-coated seeds were not yet oxidized and generated heat at room temperature and a relative humidity of 50%. The total amount of the seeds was charged into a plastic bag, 8 g of the pyrazolate slurry of Formulation Example 1 was added, and piston mixing was performed to obtain an iron-coated seed formulation coated with pyrazolate.

Example 4
An iron-coated seed formulation coated with compound (I) in the same manner as in Example 1, except that 1.92 g of the compound (I) slurry of Formulation Example 2 was treated instead of the pyrazolate slurry of Formulation Example 1 Got.

Comparative Example 1
After 100 g of dried paddy rice seeds (variety: Koshihikari) were soaked in water at room temperature for 12 hours, wet rice seeds that had been sufficiently drained were obtained. After all the wet seeds are put into a bread mixer (ASONE DPZ-01 type), the mixture of iron powder and calcined gypsum is added while dripping 8 g of tap water with a pipette while rotating the bread at a speed at which the seeds flow. The ratio 10: 1) was put into 77 g bread and seeded. After the mixture of iron powder and calcined gypsum was uniformly coated on the seeds, 3.5 g of calcined gypsum was further added. The obtained seeds were dried for about 3 days at room temperature without hydration to promote oxidation. The obtained iron-coated seeds did not generate heat under normal temperature and 50% relative humidity conditions, and the oxidation was stopped. The total amount of the seeds was charged into a plastic bag, 8 g of the pyrazolate slurry of Formulation Example 1 was added, and the piston was mixed to obtain an iron-coated seed formulation coated with pyrazolate.

Comparative Example 2
An iron-coated seed formulation coated with Compound (I) in the same manner as Comparative Example 1 except that 1.92 g of the Compound (I) slurry of Formulation Example 2 was treated instead of the pyrazolate slurry of Formulation Example 1 of Comparative Example 1. Got.

Test Example 1 Pyrazolate dissolution test Water was added to a container having a surface area of 900 cm ² to a depth of 4 cm, and then the iron-coated seed formulations of Examples 1 to 3 and Comparative Example 1 were treated in four places at four locations. After a predetermined time has passed, the surface water at a position 1 cm below the surface of the water is collected, and the concentration of the herbicidal active ingredient in the water (DTP [4- (2,4-dichlorobenzoyl) -1,3-dimethyl-5 which is the active body of pyrazolate) -Hydroxypyrazole] (ppm) was measured by liquid chromatography. The results are shown in Table 1.

  The iron-coated seed formulations of Examples 1 to 3 of the present invention were found to have higher DTP elution than the iron-coated seed formulation of Comparative Example 1.

Test Example 2 Elution Test of Compound (I) After filling paddy soil in a 100 cm ² pot and adding water so that the water depth becomes 4 cm, the iron-coated seed preparations of Example 4 and Comparative Example 2 were placed in 4 places at 5 locations each. Processed. After a predetermined period of time, paddy water at a position 1 cm below the surface of the water was collected, and the concentration (ppm) of the herbicidal active ingredient in the water was measured by liquid chromatography. The results are shown in Table 2.

  Compared with the iron-coated seed preparation of Example 4 of Example 4 of the present invention, a higher elution of compound (I) was observed particularly in the initial stage after the treatment.

Test Example 3 Medicinal Efficacy / Damage Test After filling paddy soil into a pot of 800 cm ² and scraping, seeds of firefly, kogi and azena were sown and mixed into the surface layer of the soil. The iron-coated seed preparations of Examples 1 to 4 and the iron-coated seed preparations of Comparative Examples 1 and 2 were sowed in four locations on the soil surface in a submerged state with a depth of 1 cm. 20 days after sowing, the growth inhibitory effect was determined according to the following criteria. The results are shown in Table 3.
Criterion 0: Growth inhibition rate 0-9%
1: 10-18% growth inhibition rate
2: Growth inhibition rate 19-27%
3: Growth inhibition rate 28-36%
4: Growth inhibition rate 37-45%
5: Growth inhibition rate 46-54%
6: Growth inhibition rate 55 to 63%
7: Growth inhibition rate 64-72%
8: Growth inhibition rate 73-81%
9: Growth suppression rate 82-90%
10: Growth inhibition rate 91-100%

Test Example 4 Medicinal Efficacy / Drug Hazard Test After padding in a paddy field, a 50 cm × 50 cm resin frame was placed, seeds of firefly, koi and azena were sown and mixed into the surface of the soil. The iron-coated seed preparations of Examples 1 to 4 and the iron-coated seed preparations of Comparative Examples 1 and 2 were sowed at 12 places in 5 grains on the soil surface in a flooded state with a water depth of 3 cm. On the other hand, iron-coated seeds not treated with the drug were sown in the same manner, and the pharmacological damage was compared with the group treated with a standard amount of Sunbird ^(R) granules (pyrazolate 10%). Twenty days after sowing, the growth inhibitory effect was determined according to the above criteria. The results are shown in Table 4.

  As apparent from Test Examples 3 to 4, weed control was achieved by sowing the iron-coated seed formulation of the present invention on the soil surface of paddy fields. Moreover, compared with the various weeds tested, the degree of growth suppression of paddy rice was remarkably low, indicating high safety against paddy rice.

  The method for producing the iron-coated seed formulation of the present invention and the weed control method using the prepared iron-coated seed formulation can be used in paddy rice cultivation, achieve labor saving of herbicide application, and control important weeds. Moreover, it is an excellent invention because it does not cause phytotoxicity to paddy rice.

Claims (16)

1) Process of processing iron powder on seeds,
2) the step of treating the seed with the herbicidal composition; and 3) the step of stopping the oxidation reaction of the treated iron powder,
A method for producing an iron-coated seed formulation, wherein the steps 1) and 2) are performed before the step 3).   2) The production method according to claim 1, wherein after performing the step of treating the seed with the herbicidal composition, 1) performing the step of treating the seed with iron powder.   2) The step of treating the seed with a herbicidal composition is performed after the step of treating the seed with iron powder and before the oxidation reaction of the iron powder stops, 2). Manufacturing method.   The production method according to claim 1, wherein 1) the step of treating the seed with iron powder and 2) the step of treating the seed with the herbicidal composition are performed simultaneously.   The herbicidal composition comprises at least one herbicidal compound selected from the group consisting of (A1) a whitening herbicidal compound or salt thereof and (A2) an acetolactate synthase-inhibiting herbicidal compound or salt thereof. The manufacturing method of any one of Claims 1 thru | or 4 included as.   (A1) Whitening type herbicidal compound is pyrazole herbicidal compound or salt thereof, triketone herbicidal compound or salt thereof and 6-chloro-3- (2-cyclopropyl-6-methylphenoxy) pyridazin-4-yl The production method according to claim 5, which is at least one selected from the group consisting of morpholine-4-carboxylate or a salt thereof.   (A2) The acetolactate synthase-inhibiting herbicidal compound is at least one selected from the group consisting of sulfonylurea herbicidal compounds or salts thereof and pyrimidinyl salicylic acid herbicidal compounds or salts thereof. Manufacturing method.   (A1) at least 1 selected from the group consisting of a whitening-type herbicidal compound consisting of pyrazolate and 6-chloro-3- (2-cyclopropyl-6-methylphenoxy) pyridazin-4-yl morpholine-4-carboxylate The production method according to claim 5 or 6, which is a seed.   (A1) The production method according to claim 5, 6 or 8, wherein the whitening type herbicidal compound is pyrazolate.   (A2) The production method according to claim 5 or 7, wherein the acetolactate synthase-inhibiting herbicidal compound is a sulfonylurea herbicidal compound.   In the step of treating the seed with the herbicidal composition, in addition to treating the seed with the herbicidal composition, the seed is at least selected from the group consisting of an insecticidal composition, a bactericidal composition and a plant growth agent. The manufacturing method as described in any one of Claims 1 thru | or 10 which processes 1 type.   The production method according to any one of claims 1 to 11, wherein the seed is a rice seed.   An iron-coated seed preparation obtained by the production method according to any one of claims 1 to 12.   The iron-coated seed preparation according to claim 13, wherein the seed is a paddy rice seed.   A method for controlling weeds, comprising seeding the iron-coated seed formulation of claim 13 on a soil surface.   A method for controlling weeds comprising seeding the iron-coated seed preparation of claim 14 on the surface of paddy field soil.