TW201501641A - Water surface-floating granular pesticide, and pouched agrochemical formulation containing the same - Google Patents

Abstract

The present invention is to provide a water surface-floating granular pesticide comprising (a) an agrochemical active ingredient, (b) a polyoxyethylene alkane diol, (c) an arylsulfonic acid salt or a formaldehyde condensate thereof, (d) a condensed phosphoric acid salt, (e) a floating auxiliary, and (f) a diluent, wherein a weight ratio of the polyoxyethylene alkane diol to the arylsulfonic acid salt or a formaldehyde condensate thereof is from 1:0.5 to 1:5.

Description

Floating granular pesticide on water surface and bagged agrochemical formulation containing the same

The present invention relates to a floating granular pesticide on a water surface, and a bagged agrochemical formulation containing the same.

There has been known a floating granular pesticide containing a floating adjuvant to control a water surface having a specific gravity of less than 1 (see, for example, Japanese Patent Laid-Open No. 2009-114102 and Japanese Patent Laid-Open No. 2009-173575). The method of using a water surface to float a granular pesticide has been established as a technique for floating or dispersing a floating granular pesticide applied to the surface of the rice field to the surface of the rice, thereby allowing the agrochemical active ingredient to spread throughout the rice field.

Floating granular pesticides on water surfaces can sometimes be used for paddy fields by direct spraying, and sometimes by the following methods: floating granular pesticides on water surfaces are contained in small bags made of water-soluble membranes, and then The bagged agricultural chemical formulation was thrown into the rice field. After the bagged agricultural chemical formulation (jumbo formulation) is thrown into the rice field, the water-soluble film dissolves rapidly, and the floating granular pesticide contained in the water surface floats on the water surface and is dispersed on the water surface. Thus, agrochemical active ingredients are found throughout the rice fields. However, the change in the surface of the paddy water depends on the region, season, etc., and due to the wide surface area of the movable water, the traditional water surface floats granular agriculture. The drug exhibits satisfactory dispersibility in rice fields with a few obstacles, such as floating weeds and algae. If the surface area of the water on which the granular pesticide floats on the surface of the water is limited, for example, a part or most of the water surface is covered by an obstacle formed by the separation of the topsoil, and the surface of the water is aggravated. Pesticides cannot show the problem of dispersion. Therefore, there is still a need for floating granular pesticides on water surfaces that exhibit satisfactory dispersibility even in an environment that is not conducive to dispersion.

It is an object of the present invention to provide a novel water surface floating granular pesticide in combination with a specific surfactant.

The inventors of the present invention have devoted themselves to research to find novel water-surface floating granular pesticides, and have found that they will contain agrochemical active ingredients (hereinafter sometimes referred to as component a) and polyoxyethylene alkylene glycol (hereinafter sometimes referred to as Component b), aryl sulfonate or its formaldehyde condensate (hereinafter sometimes referred to as component c), condensed phosphate (hereinafter sometimes referred to as component d), floating adjuvant (hereinafter sometimes referred to as A particulate pesticide floating on the surface of water as component e), and a diluent (hereinafter sometimes referred to as component f), and a weight ratio of component b to component c of 1:0.5 to 1:5 (hereinafter sometimes referred to as The granular pesticide of the present invention) is applied to rice fields to exhibit satisfactory dispersibility even in an environment unfavorable for dispersion.

That is, the present invention is as follows:

[1] A water-surface floating granular pesticide comprising (a) an agrochemical active ingredient, (b) a polyoxyethylene alkylene glycol, (c) an arylsulfonate or a formaldehyde condensate thereof, (d) a condensation Phosphate, (e) a floatation aid, and (f) a diluent; wherein the weight ratio of the polyoxyethylene alkanediol to the arylsulfonate or its formaldehyde condensate is from 1:0.5 to 1:5.

[2] The floating surface granular pesticide according to [1] above, wherein the bleaching The float aid is one or more floating adjuvants selected from the group consisting of a micro hollow body and a plastic micro hollow body.

[3] The water-surface floating granular pesticide according to [1] or [2] above, wherein the agrochemical active ingredient is a herbicidal active ingredient.

[4] The water surface floating granular pesticide according to the above [3], wherein the herbicidal active ingredient is at least one selected from the group consisting of propyrisulfuron, bromobutide, and dicyclohexyl ketone. Herbicidal active ingredient of the group consisting of (benzobicyclone), pentoxazone, ipfencarbazone and imazosulfuron.

[5] The water-surface floating granular pesticide according to the above [3], wherein the herbicidal active ingredient is at least one selected from the group consisting of pyrimidine, bromobutachlor, bisacesulfame and acesulfame. a group of herbicidal active ingredients.

[6] A bagged agricultural chemical formulation comprising the water surface floating granular pesticide according to any one of the above [1] to [5] wherein the water surface floating granular pesticide is contained in the water soluble film. Made in a small bag.

According to the present invention, it is possible to provide a water surface floating granular pesticide which exhibits satisfactory dispersibility even when applied to rice fields even in an environment unfavorable for dispersion.

The component a contained in the granular pesticide of the present invention is not particularly limited, and examples thereof include conventionally known herbicidal active ingredients, plant growth regulating active ingredients, microbicidally active ingredients, insecticidal active ingredients, and insect growth regulating active ingredients. .

Examples of insecticidal active ingredients and insect growth regulating active ingredients include pyrethroid compounds such as deltamethrin, tralmethrin, acrinathrin, andmethrin (tetramethrin) and tefluthrin; urethane compounds, such as propoxur, isoprocarb, xylylcarb, metolcarb, sulfur enemy (thiodicarb), XMC, carbaryl, pirimicarb, carbofuran, methomyl, phenoxycarb, and fenobucarb; organic Phosphorus compounds such as acephate, trichlorphon, tetrachlorvinphos, dimethylvinphos, pyridafenthion, pirimiphos-methyl ), fenthion, fenitrothion, diazinon, quinalphos, isoxathion, chlorpyrifos-methyl, vamidothion, marathon (malathion), phenothoate, big snail (dimethoat) e), disulfoton, monocrotophos, chlorfenvinphos, propaphos, EPN, pyraclofos, azinphosethyl and tamarind ( Azinphosmethyl); urea compounds, such as diflubenzuron, chlorfluazuron, lufenuron, hexaflumuron, flufenoxoron, flucycloxuron, race Cyromazine, diafenthiuron, hexythiazox, novaluron, teflubenzuron, triflumuron, 4-chloro-2-(2-chloro -2-methylpropyl)-5-(6-iodo-3-pyridylmethoxy)indole -3(2H)-one, 1-(2,6-difluorobenzhydryl)-3-[2-fluoro-4-(trifluoromethyl)phenyl]urea, 1-(2,6- Difluorobenzhydryl)-3-[2-fluoro-4-(1,1,2,3,3,3-hexafluoropropoxy)phenyl]urea, 2-tert-butylimine 3-isopropyl-5-phenyl-3,4,5,6-tetrahydro-2H-1,3,5-thiadiazol-4-one, and 1-(2,6-difluorobenzene Mercapto)-3-[2-fluoro-4-(1,1,2,2-tetrafluoroethoxy)phenyl]urea; chloronicotyl compound, such as imidacloprid, sub Acetamiprid, clothianidin, nitenpyram, thiametoxam, dinotefuran, and thiacloprid; spinosyns , such as spinosad; diamine compounds, such as flubendiamide, chlorantraniliprole, and cyantraniliprole; phenylpyrazole compounds, such as fipronil And ethiprole; tetraamine compounds, such as spirotetramat, spiromesifen, and spirodiclofen; cartap, buprofezin ), thiocyclam, free speed (bensul) Tap), fenazaquin, fenpyroximate, pyridaben, hydramethylnon, chlorfenapyr, fenpyroximate, pymetrozine, must Pyrimidifen, tebufenozide, tebufenpyrad, triazamate, indoxacarb, sulfluramid, milbemectin, avi Avermectin, boric acid and p-dichlorobenzene.

Examples of microbicidal active ingredients include benzimidazole compounds such as benomyl, carbendazim, thiabendazole and thiophanate-methyl; phenyl carbazate a compound, such as diehofencarb; a dicarboxy quinone imine compound, such as procymidone, iprodione, and vinclozolin; an azole compound, such as diniconazole, Probenazole, epoxyconazole, tebuconazole, difenoconazole, cyproconazole, flusilazol, and triadimefon; Mercaptoalanine compounds, such as metalaxyl; carboxyguanamine compounds such as furametpyr, mepronil, fluolanil, and thifluzamide; organophosphorus compounds , such as tolclofos-methyl, fosetyl-aluminum and pyrazophos; anilinopyrimidine compounds such as pyrimethanil, mepanipyrim and cyprodinil (cyprodinil); cyanopyrrole compounds, such as fludioxonil and fenpiclonil; antibiotics, such as blasticidin S, kasugamycin, granulosus Polyoxin and validamycin; methoxyacrylate compounds such as azoxystrobin, kresoxim-methyl and SSF-126; chlorothalonil, zinc Manzeb, captan, folpet, tricyclazole, pyroquilon, probenazole, fthalide, gram (cymoxanil), dimethomorph, CGA245704, famoxadone, oso Oxolinic acid, fluazinam, ferimzone, diclocymet, chlobenthiazone, isovaledione, thio-ortho Thiophthalimideoxybisphenoxyarsine, propyl 3-iodo-2-butylcarbamate, p-hydroxybenzoate, sodium acetate dehydrate, potassium sorbate, epothilone ( Orysastrobin), isothianil, thiazine and thiuram.

Examples of herbicidal active ingredients include bensulfuron-methyl, pyrazoosulfuron-ethyl, azimsulfuron, sulfosulfuron, acesulfame, and pyrimidine. Long, phenmedipham, asulam, pyributicarb, propachlor, metazachlor, thenylchlor, simazine, Atrazine, propazine, cyanazine, ametryne, simetryn, dimethametryn, prometryn, Isoxaben, diflufenican, diuron, linuron, fluometuron, methyldymron, isoproturon Isoproturon), isouron, tebuthiuron, methabenzthiazuron, propanil, mefenacet, clomeprop, naproanilide, Brombutachlor, dimuron, etobenzanide, indanofan, amitrol Sulfentrazone, fentrazamide, isoxaflutole, chloridazon, norflurazon, pyrithiobac, clef Bromacil), terbacil, metribuzin, Oxaziclomefone, cinmethylin, flumiclorac-pentyl, flumioxazin, fluthiacet-methyl, azafenidin, Oxadizon, oxadiargyl, cyclopentaloxone, cafenstrole, pyriminobac-methyl, bispyribac-sodium, ring Pyrifalid, indanofan, dicyclohexanone, dithiopyr, chlorthiamid, pretilachlor, triazolam and oxalox Nitrile (pyraclonil).

Examples of plant growth regulating active ingredients include maleic hydrazide, chlormequat, ethephon, gibberellin, mepiquat-chloride, thidiazepine (thidiazuron), inabenfide, paclobutrazol and uniconazole. Among them, preferred are herbicidal active ingredients, and particularly preferably at least one selected from the group consisting of pyrimidine, bromobutachlor, dicyclohexanone, cyclopentazone, triazolam and yawlon Herbicidal active ingredients of the group consisting.

The content of the component a in the granular pesticide of the present invention is usually from 0.1 to 80% by weight, preferably from 0.5 to 70% by weight, and more preferably from 1 to 100% by weight based on 100% by weight of the granular pesticide of the present invention. 50% by weight.

The component b contained in the granular pesticide of the present invention is obtained by addition polymerization of an alkylene glycol having 6 to 14 carbon atoms and ethylene oxide, and the addition molar number of the ethylene oxide is usually It is about 1 to 7 moles, and specific examples thereof include New Calgen TG-310 (manufactured by TAKEMOTO OIL & FAT). The content of the component b in the granular pesticide of the present invention is usually from 0.1 to 20% by weight, preferably from 0.5 to 10% by weight, and more preferably from 1 to 100% by weight based on 100% by weight of the particulate pesticide of the present invention. 10% by weight.

In the present invention, the arylsulfonic acid means a compound having a sulfonic acid group (-SO ₃ H) directly bonded to an aromatic ring which may be substituted with a chain hydrocarbon group. Examples of the chain hydrocarbon group include an alkyl group having 1 to 4 carbon atoms such as a methyl group, an isopropyl group, a butyl group and an isobutyl group; and examples of the aromatic ring include benzene and naphthalene. The component c contained in the granular pesticide of the present invention is a salt of an arylsulfonic acid (alkali metal salt such as a sodium salt) or a formaldehyde condensate thereof, and specific examples thereof include a formaldehyde condensate of a naphthalenesulfonate (New Calgen WG) -2, manufactured by TAKEMOTO OIL & FAT), alkylnaphthalenesulfonate (New Calgen BX-C, manufactured by TAKEMOTO OIL & FAT) and alkylnaphthalenesulfonate formaldehyde condensate (Demol SN-B, by Kao Manufacturing company). The content of the component c in the granular pesticide of the present invention is usually 0.1 to 20% by weight, preferably 0.5 to 10% by weight, and more preferably 1 to 100% by weight based on 100% by weight of the granular pesticide of the present invention. 10% by weight.

The total content of the components b and c in the granular pesticide of the present invention is usually from 5 to 40% by weight, preferably from 5 to 20% by weight, based on 100% by weight of the particulate pesticide of the present invention. Preferably it is 5 to 15% by weight. In terms of weight ratio, the ratio of the content of the component b to the content of the component c in the granular pesticide of the present invention is from 1:0.5 to 1:5.

In the present invention, the condensed phosphate is a condensed phosphoric acid salt having two or more phosphoric acid condensed through an oxygen atom. Examples of the condensed phosphoric acid include polyphosphoric acid, tripolyphosphoric acid, and pyrophosphoric acid; and examples of the salt include alkali metal salts (such as sodium salts and potassium salts) and ammonium salts. Specific examples of the component d contained in the granular pesticide of the present invention include sodium polyphosphate, sodium tripolyphosphate and sodium pyrophosphate, and preferably sodium tripolyphosphate. The content of the component d in the granular pesticide of the present invention is usually from 0.1 to 20% by weight, preferably from 0.5 to 10% by weight, and more preferably from 3 to 100% by weight based on 100% by weight of the particulate pesticide of the present invention. 10% by weight.

In the present invention, the component e means a substance having a specific gravity of less than 1, and the addition of the component e allows the granular pesticide to float on the water surface by a decrease in specific gravity. Examples of the component e contained in the granular pesticide of the present invention include an inorganic floating adjuvant and an organic floating adjuvant; and examples of the inorganic floating adjuvant include a glass micro hollow body, foamed shirasu (a light gray color) Volcanic ash), foamed pumice and foamed perlite. Examples of the organic floating aid include foamed synthetic resins (including plastic micro hollow bodies), synthetic resin powders such as polyethylene powder and polypropylene powder, paraffin wax, waxy substances derived from plants and animals, corks, and wood flour. Among them, a glass micro hollow body, a foamed white sand, and a plastic micro hollow body are preferable, and a glass micro hollow body and a plastic micro hollow body are particularly preferable.

In the present invention, the glass micro-hollow system is a hollow particle made of so-called glass, and the material of the shell contains cerium oxide (SiO ₂ ) as a main component, and also contains an alkali metal oxide such as Na ₂ O. And other ingredients (such as alkaline earth metal oxides and boric acid). The glass micro hollow body usually has a particle diameter of 16 to 65 μm, and the particle diameter refers to a particle diameter in which the cumulative frequency becomes 50% in a volume-based particle size distribution, and the laser particle diameter can be obtained by laser Measured by a diffraction scattering particle size distribution analyzer. Examples of commercially available glass micro hollow bodies include Glass Bubbles (manufactured by Sumitomo 3M Co., Ltd.).

In the present invention, the hollow particles of the plastic micro-hollow system, the material of the shell is a thermoplastic resin, and the plastic micro-hollow body is also called a microballoon. A vinylene chloride copolymer, an acrylonitrile copolymer, and an acrylate copolymer are generally used as a thermoplastic resin. The plastic micro hollow body usually has a particle diameter of 5 to 130 μm, and the particle diameter refers to a particle diameter distribution based on a volume, the cumulative number of times becomes 50%, and the laser diffraction can be scattered by laser diffraction. Particle size distribution analyzer measurement. Examples of commercially available plastic micro-hollow bodies include Matsumoto Microsphere F-30E (10% by weight of the shell material is a vinylidene chloride-acrylonitrile copolymer plastic micro hollow body and 90 weights) % water mixture, manufactured by Matsumoto Yushi-Seiyaku Co., Ltd.).

The component e content in the granular pesticide of the present invention is usually from 0.5 to 80% by weight, preferably from 1 to 50% by weight, based on 100% by weight of the particulate pesticide of the present invention.

The solid carrier used in the conventional granular pesticide can be used as the component f contained in the granular pesticide of the present invention. Examples of such solid carriers include water-soluble carriers such as organic acids (for example, citric acid, succinic acid, and maleic acid) or salts thereof, urine. And sugars (for example, lactose, glucose and sucrose), vegetable powders (for example, soy flour, tobacco powder, flour and wood flour), mineral or inorganic powders (for example, clays such as kaolin, Expanded soil, acid clay and clay; talc, such as talc and Shoushan powder; vermiculite, such as diatomaceous earth and mica powder; bauxite; sulfur powder; activated carbon; potassium chloride; ammonium sulfate; Sodium sulfate; calcium carbonate and magnesium carbonate), and particularly preferably at least one diluent selected from the group consisting of bentonite and calcium carbonate. The content of the component f in the granular pesticide of the present invention is usually from 5 to 90% by weight, preferably from 10 to 90% by weight, based on 100% by weight of the granular pesticide of the present invention.

The granular pesticide of the present invention may further comprise an adjuvant for the formulation used in the conventional granular pesticide. Examples of adjuvants for use in the formulation include binding agents, stabilizers, colorants, and perfumes. When the granular pesticide of the present invention contains an adjuvant for a formulation, the content is usually 0.01 to 30% by weight, preferably 0.1 to 20% by weight based on 100% by weight of the granular pesticide of the present invention. .

Examples of the binder include water-soluble polymers such as salts of carboxymethylcellulose (sodium salt, etc.), polyvinyl alcohol or derivatives thereof, sodium alginate, xanthan gum, and gum arabic (gum Arabic) ). Among them, salts (carboxy salts, etc.) of carboxymethyl cellulose are particularly preferred.

Examples of stabilizers include phenolic antioxidants, amine antioxidants, phosphorus antioxidants, sulfur antioxidants, ultraviolet absorbers, epoxidized vegetable oils (such as epoxidized soybean oil, epoxidized linseed oil, and epoxidized vegetables). Seed oil), isopropyl phosphate, liquid paraffin and ethylene glycol.

Examples of the coloring agent include Rhodamines such as Rose Red B and Solar Rhodamine, and pigments such as Yellow No. 4, Blue No. 1 and Red No. 2. Examples of perfumes include ester perfumes such as acetoacetic acid Ethyl ester, ethyl heptanoate, ethyl cinnamate and isoamyl acetate; organic acid perfumes such as caproic acid and cinnamic acid; alcoholic perfumes such as cinnamyl alcohol, vanillyl alcohol, citral and decyl alcohol; aldehyde Classes such as vanillin, piperonal and perillaldehyde; ketone fragrances such as maltol and methyl beta-naphthyl ketone; and methanol.

The granular pesticide of the present invention can be produced by mixing the component a, the component b, the component c, the component d, the component e and the component f, and, if necessary, an adjuvant for the formulation; In terms of extrusion granulation. More specifically, first, water is added by mixing the component a, the component b, the component c, the component d, the component e, and the component f, and, if necessary, the mixture obtained by the adjuvant of the formulation, and The mixture was kneaded using a kneader, and then the obtained kneaded mixture was subjected to granulation to obtain granules. Thereafter, the granules are dried, and if necessary, crushed, sieved, sizing, or the like, the granular pesticide of the present invention can be obtained. The amount of water added during the kneading is usually from about 3 to 50% by weight based on the mixture.

The extrusion granulation process is carried out using a screen having pores usually having a diameter (mmφ) of about 0.5 to 5.0 mm, and preferably about 0.7 to 2.0 mmφ. The granules obtained by granulation are usually dried at 30 to 90 ° C, and preferably at 30 to 80 ° C. The granular pesticide of the present invention obtained by the extrusion granulation method has a grain length of usually from about 0.5 to 10.0 mm, and preferably from 0.7 to 7.0 mm. As used herein, particle length refers to the maximum length a particle can have.

Examples of the kneading machine used for producing the granular pesticide of the present invention include a vertical granulator (manufactured by POWREX Co., Ltd.), a high-speed mixer (manufactured by EARTHTECHNICA Co., Ltd.), a kneader, and a cone mixer (Nauta mixer). ) and the Redige mixer. Examples of the extrusion granulator used in the extrusion granulation method include a snail Rotary extrusion granulator, roll extrusion granulator, disc granulating extrusion granulator, pellet mille type extrusion granulator, basket extrusion granulator, blade Extrusion granulator, oscillating extrusion granulator, gear extrusion granulator and ring die extrusion granulator, and specific examples of extrusion granulator include BASKET RYUZER, TWIN-DOME GRAN And SINGLE-DOME GRAN (all manufactured by Fuji Paudal Co., Ltd.).

The granular pesticide of the present invention is applied to rice fields by a commonly used method such as hand-dispersion method and mechanical dispersion method. The granular pesticide of the present invention can also be formulated into a bagged agrochemical formulation by being contained in a sachet made of a water-soluble film. The bagged agrochemical formulation is suitable for use in rice fields. When the bagged agrochemical formulation is dropped onto the surface of the rice field on the field, the water-soluble film dissolves rapidly, and the granular pesticide of the present invention contained therein is released and floats on the water surface. After the granular pesticide of the present invention floats and spreads over the water surface, the granular pesticide is disintegrated and dispersed in the water, so that the agrochemical active ingredient can function in the rice field without variation.

The water-soluble film is a film dissolved in water, and examples thereof include use of polyvinyl alcohol or a derivative thereof, pullulan, a water-soluble fiber derivative such as a salt of carboxymethylcellulose (sodium salt, etc.), And a film formed of polyoxyethylene or a derivative thereof as a raw material. Among them, a film formed by using polyvinyl alcohol or a derivative thereof as a raw material is preferred.

The bagged agrochemical formulations of the present invention can be obtained by conventional methods for making bagged agrochemical formulations. More specifically, the granular pesticide of the present invention is encapsulated with a water-soluble film, followed by sealing, for example, by heat sealing and using an adhesive. The granular pesticide of the invention is in the bag of agricultural chemical regulation of the bag of the invention The content in the complex is usually from 10 to 1,000 g (g), and preferably from 10 to 80 g.

The application amount of the granular pesticide of the present invention is appropriately set according to the content of the agrochemical active ingredient contained in the granular pesticide of the present invention, and is not particularly limited. For example, when applying granular pesticides to rice fields, the application amount of the granular pesticide is usually 100 to 1,000 g per 10 ares (100 square centimeters (mm ² )) of rice fields, and is preferably 100 to 800g.

Since the granular pesticide of the present invention exhibits satisfactory dispersibility even in an environment unfavorable for dispersion (the surface area of the dispersible water is small), the granular pesticide of the present invention can be applied regardless of the surface of the rice field water.

Example

The invention will now be illustrated in greater detail by the following examples.

First, the fabrication examples and production references are as follows.

Production Examples 1 to 21

The raw materials listed in Table 1 were mixed according to the respective weight ratios listed in Table 1, and a prescribed amount of water was added, followed by kneading the mixture to obtain a kneaded mixture. The obtained kneaded mixture was granulated by an extrusion granulator equipped with a sieve having a hole of 1.5 mmφ (RG-5M, manufactured by KIKUSUI SEISAKUSHO LTD), followed by a fluidized layer dryer (fluidized- The beddryer) (MDB-400, manufactured by Fuji Paudal Co., Ltd.) was dried to obtain the granular pesticides 1 to 21 of the present invention, respectively.

The numerical values in Table 1 indicate parts by weight, and "equilibrium" indicates the remaining amount when all the parts are 100 parts by weight. The trade name of the raw material has the symbol "*" as the aqueous mixture, and its value indicates the solid content when the water is removed.

The trade names listed in Table 1 are as follows: New Calgen TG-310: polyoxyethylene alkylene glycol (manufactured by TAKEMOTO OIL &FAT); New Calgen BX-C: sodium alkylnaphthalene sulfonate (manufactured by TAKEMOTO OIL &FAT);Demol SN-B: formaldehyde condensate of alkylnaphthalene sulfonate (manufactured by Kao Co., Ltd.); New Calgen WG-2: formaldehyde condensate of naphthalene sulfonate (manufactured by TAKEMOTO OIL &FAT); Matsumoto Ball F-30E: The material of the shell of 10% by weight is a mixture of a plastic micro hollow body of a vinylidene chloride-acrylonitrile copolymer and 90% by weight of water (manufactured by Matsumoto Yushi-Seiyaku Co., Ltd.); glass bubble K1 : glass micro hollow body (manufactured by Sumitomo 3M Co., Ltd.); Toxanone GR-31A: a mixture of 43% by weight of sodium polyacrylate and 57% by weight of water (manufactured by Sanyo Chemical Industries, Ltd.); Cellogen 7A: sodium carboxymethylcellulose (manufactured by Dai-ichi Kogyo Seiyaku Co., Ltd.); Bentonite Myogi: bentonite (manufactured by HOJUN Co., Ltd.); Kunigel V1: bentonite (manufactured by KUNIMINE INDUSTRIES CO., LTD.); and Tohoku Tankaru (#250): calcium carbonate (manufactured by Towa Sekkai Kogyo Co., Ltd.).

Production reference examples 1 to 5

The raw materials listed in Table 2 were mixed according to the respective weight ratios listed in Table 2, and the same operations as in Production Examples 1 to 21 were carried out to obtain comparative granular pesticides 1 to 5, respectively.

The values in Table 2 represent parts by weight, and "equilibrium" means the remaining amount when all parts are 100 parts by weight. The trade name of the raw material has the symbol "*" as the aqueous mixture, and its value indicates the solid content when the water is removed.

The trade names of Table 2 are as described above.

Test example 1

A water-soluble film (Hi-Selon S-660, manufactured by The Nippon Synthetic Chemical Industry Co., Ltd.) made of polyvinyl alcohol as a raw material was wrapped in a predetermined amount by floating granular pesticide. Seal it by heat sealing. The tap water was placed in a container made of plastic measuring 37 cm (cm) x 25 cm so that the water depth became 5 cm. A granular pesticide floating on the water surface surrounded by the water-soluble film was dropped near the center of the container, and then the dispersion of the floating granular pesticide on the surface of the water was evaluated. The evaluation criteria were as follows: A: The particles were uniformly dispersed one by one, and almost no aggregation of the particles was observed, and thus satisfactory dispersibility was observed; B: aggregation of particles was slightly observed; C: 5 to 10 were frequently observed. The particles aggregate and thus have poor dispersibility. The results are shown in Tables 3 and 4.

Claims (6)

A water surface floating granular pesticide comprising (a) an agrochemical active ingredient, (b) a polyoxyethylene alkanediol, (c) an aryl sulfonate or a formaldehyde condensate thereof, (d) a condensed phosphate, (e) a floatation aid, and (f) a diluent; wherein the weight ratio of the polyoxyethylene alkylene glycol to the arylsulfonate or its formaldehyde condensate is from 1:0.5 to 1:5. The water surface floating granular pesticide according to claim 1, wherein the floating aid is at least one floating adjuvant selected from the group consisting of a glass micro hollow body and a plastic micro hollow body. The water surface floating granular pesticide according to claim 1 or 2, wherein the agrochemical active ingredient is a herbicidal active ingredient. The water surface floating granular pesticide according to claim 3, wherein the herbicidal active ingredient is at least one selected from the group consisting of propyrisulfuron, bromobutide, and dicyclohexyl ketone. Herbicidal active ingredient of the group consisting of (benzobicyclone), pentoxazone, ipfencarbazone and imazosulfuron. The water surface floating granular pesticide according to Item 3 of the patent application, wherein the herbicidal active ingredient is at least one selected from the group consisting of pyrimidine, bromobutazone, dicyclohexyl ketone and acesulfame. a group of herbicidal active ingredients. A bagged agrochemical formulation comprising the water surface floating granular pesticide according to any one of claims 1 to 5, wherein the water surface floating granular pesticide is contained in a pouch made of a water soluble film in.