Agrochemical composition that floats on water

Abstract

The purpose of the present invention is to provide an agrochemical composition that floats on water and that exhibits excellent diffusibility and excellent particle disintegration.　The agrochemical composition that floats on water comprises an agrochemical active ingredient, a fibrous material, and an acetylene glycol-based surfactant. The fibrous material contains an aggregate of microfibrils formed from cellulose, and the average fiber length of the microfibrils is 10 to 1,000 μm.

Description

Water-floating pesticide composition

[0001] The present invention relates to a water-floating pesticide composition.

[0002] A method of using a water-floating pesticide composition (water-floating pesticide granules) containing a floating aid to make the specific gravity less than 1 as a pesticide granule has been established as a technique for distributing the pesticide active ingredient throughout the entire field by applying the pesticide to paddy fields, etc. and causing it to float and diffuse on the water surface.

[0003] The water-floating pesticide composition may be used by spraying it directly onto paddy fields, or may be used by encapsulating it in a water-soluble film or the like and then pouring it into the paddy field as a bagged pesticide formulation. After pouring the bagged pesticide formulation (jumbo formulation) into the paddy field, the water-soluble film quickly dissolves, and the encapsulated water-floating pesticide composition floats on the water surface and spreads throughout the paddy field, distributing the pesticidal active ingredient.

[0004] In a water-floating pesticide composition, when the composition is applied to a paddy field or the like, the particles are required to be easily dispersed without agglomeration (excellent dispersion). When the above-mentioned bag-shaped pesticide formulation is adopted, the particles are densely packed inside the bag-shaped pesticide formulation, so they are prone to agglomeration during spraying. Therefore, the bag-shaped pesticide formulation is particularly required to have excellent dispersion. Furthermore, in order to diffuse the pesticidal active ingredient in a water-floating pesticide composition throughout the paddy field, it is also required that the individual particles of the composition disintegrate and disperse easily (excellent disintegration).

[0005] Patent Document 1 discloses a water-floating pesticide granular composition containing a pesticidal active ingredient, an alkanediol derivative represented by formula (I), condensed phosphoric acid or a salt thereof, a flotation aid, and a bulking agent.

[0006] Patent No. 5709343

[0007] Although Patent Document 1 discloses that the water-floating pesticide granular composition has excellent floating and diffusibility on the water surface, it does not mention anything about the disintegration of the granules. As described above, it is desired to realize a water-floating pesticide composition that has excellent diffusibility and excellent disintegration of the granules.

[0008] An object of the present invention is to provide a water-floating pesticide composition that is excellent in diffusibility and particle disintegration properties.

[0009] As a result of intensive research aimed at solving the above problems, the inventors have discovered that the above problems can be solved by using a specific fiber and an acetylene glycol surfactant, and have thus completed the present invention. Specific aspects of the present invention are as follows.

[0010] [1] A water-floating pesticide composition comprising a pesticidal active ingredient, fibrous material, and an acetylene glycol-based surfactant, wherein the fibrous material comprises an aggregate of microfibrils made of cellulose, and the microfibrils have an average fiber length of 10 to 1,000 μm. [2] The water-floating pesticide composition according to [1], wherein the microfibrils comprise microfibrils derived from wheat, beet, pulp, corn, soybean, pea, oat, bamboo, sugarcane, potato, apple, psyllium, or rice. [3] The water-floating pesticide composition according to [1] or [2], wherein the microfibrils comprise crystalline cellulose. [4] The water-floating pesticide composition according to any one of [1] to [3], wherein the fibrous material contains insoluble dietary fiber at a content of 70% or more. [5] The water-floating pesticide composition according to any one of [1] to [4], wherein the content of the fibrous material in the entire water-floating pesticide composition is 1 to 15% by weight. [6] The water-floating pesticide composition according to any one of [1] to [5], wherein the acetylene glycol surfactant is an acetylene glycol compound represented by the following formula (1): [In the formula (1), R １ and R ４ are each an alkyl group or an aryl group having 1 to 20 carbon atoms, and may be the same or different from each other; R ２ and R ３ are each an alkyl group having 1 to 3 carbon atoms, and may be the same or different, and m and n are each a positive number of 0 or 30 or less. １ and R ４ are each independently an alkyl group having 1 to 5 carbon atoms, and R ２and R ３ [8] The water-floating pesticide composition according to [6], wherein each of R is independently an alkyl group having 1 to 3 carbon atoms, and the average number of moles of ethylene oxide units added (m+n) is 0 to 30 moles. １ and R ４ is a methyl group, and R ２ and R ３ is an isobutyl group, and the average number of moles of ethylene oxide units added (m+n) is 0 to 30 moles. [9] The water-floating pesticide composition according to any one of [1] to [8], wherein the content of the acetylene glycol surfactant in the entire water-floating pesticide composition is more than 0% by weight and not more than 5% by weight.

[10] The water-floating pesticide composition according to any one of [1] to [9], which is encapsulated in a water-soluble film.

[11] The water-floating pesticide composition according to

[10] , wherein the water-soluble film contains polyvinyl alcohol.

[12] The water-floating pesticide composition according to any one of [1] to

[11] , which is in the form of a granule.

[13] The water-floating pesticide composition according to any one of [1] to

[12] , further containing white carbon.

[0011]

[14] The water-floating pesticide composition according to any one of [1] to

[13] , further comprising clay and bentonite.

[15] The water-floating pesticide composition according to any one of [1] to

[14] , wherein the pesticidal active ingredient comprises at least one selected from the group consisting of benzobicyclon, pentoxazone, cafenstrole, fenquinotrione, pyraclonil, florpyrauxifenbenzyl, fentrazamide, pyriftalid, tefuryltrione, triafamone, propyrisulfuron, cyclopyrimorate, ipfencarbazone, imazosulfuron, and penoxsulam.

[16] The water-floating pesticide composition according to any one of [1] to

[15] , wherein the pesticidal active ingredient comprises at least one selected from the group consisting of benzobicyclon, pentoxazone, florpyrauxifenbenzyl, and triafamone.

[17] The water-floating pesticide composition according to any one of [1] to

[16] , wherein the pesticidal active ingredient comprises a combination of benzobicyclon, pentoxazone, and triafamone, or a combination of benzobicyclon, florpyrauxifenbenzyl, and triafamone.

[18] The water-floating pesticide composition according to any one of [1] to

[17] , wherein the content of the pesticidal active ingredient in the entire water-floating pesticide composition is 0.1 to 80% by weight, preferably 0.1 to 50% by weight, and more preferably 0.2 to 30% by weight.

[0012]

[19] A method for using a water-floating pesticidal composition, comprising a step of spraying the water-floating pesticidal composition according to any one of [1] to

[18] to a paddy field.

[20] The method according to

[19] , wherein the water-floating pesticidal composition is sprayed by an aircraft.

[21] The method according to

[20] , wherein the aircraft is a drone.

[0013] The water-floating pesticide composition of the present invention has excellent diffusibility and excellent particle disintegration properties.

[0014] In this specification, when a numerical range is expressed using "X to Y", the range is inclusive of both end values. In this specification, "diffusibility" means the property of the particles to diffuse into the surroundings without agglomerating when the water-floating pesticide composition (an aggregate of multiple particles) is applied directly or in the form of a bag-shaped pesticide formulation to a paddy field or the like. In this specification, "disintegrability" means the property of the individual particles to disintegrate and disperse after diffusion when the water-floating pesticide composition is applied directly or in the form of a bag-shaped pesticide formulation to a paddy field or the like.

[0015] The water-floating pesticide composition of the present invention will be described below.

[0016] <Water-Floating Pesticide Composition> The water-floating pesticide composition of the present invention comprises a pesticidal active ingredient, fibrous material, and an acetylene glycol-based surfactant, wherein the fibrous material is an aggregate of microfibrils made of cellulose, and the microfibrils have an average fiber length of 10 to 1000 μm. In the present invention, by using the fibrous material and the acetylene glycol-based surfactant in combination, it is possible to achieve both the diffusibility and the particle disintegrability of the water-floating pesticide composition.

[0017] The water-floating pesticide composition may be in the form of a granule.

[0018] (Agricultural chemical active ingredient) The agricultural chemical active ingredient is not particularly limited, and examples thereof include compounds that are active ingredients of various conventionally known herbicides, plant growth regulators, fungicides, insecticides, miticides, nematicides, etc. The agricultural chemical active ingredients can be used alone or in combination of two or more kinds.

[0019] Examples of herbicides (herbicidally active ingredients) include ALS inhibitors, germination / elongation inhibitors, photosynthesis inhibitors, PPO inhibitors, bleaching agents, VLCFAs inhibitors, hormone action inhibitors / disruptors, and ACCase inhibitors. Herbicides can be used alone or in combination of two or more.

[0020] Examples of ALS inhibitors include amidosulfuron, azimsulfuron, bensulfuron-methyl, bispyribac, chlorimuron-ethyl, chlorsulfuron, cinosulfuron, cloransulam-methyl, cyclosulfamuron, Diclosulam, ethametsulfuron-methyl, ethoxysulfuron, flazasulfuron, florasulam, flucarbazone, flumetsulam, flupyrsulfuron-methyl, foramsulfuron, halosulfuron-methyl ron-methyl), imazamethabenzmethyl, imazamox, imazapic, imazapyr, imazaquin, imazethapyr, imazosulfuron, iodosulfuron-methyl, iofensulfuron, iofensulfuron sodium -sodium), metazosulfuron, metsulfuron-methyl, nicosulfuron, orthosulfamuron, oxasulfuron, penoxsulam, primisulfuron-methyl, propoxycarbazone, propyrisulfuron,Prosulfuron, pyrazosulfuron-ethyl, pyribenzoxim, pyriftalid, pyriminobac-methyl, pyrimisulfan, pyrithiobac, rimsulfuron, sulfometuron-methyl, sulfosulfuron n), thiencarbazone-methyl, thifensulfuron-methyl, triafamone, triasulfuron, tribenuron-methyl, trifloxysulfuron, triflusulfuron-methyl, and tritosulfuron.

[0021] Examples of germination and elongation inhibitors include benfluralin, bromobutide, butamifos, butralin, carbetamide, chlorpropham, chlorthal-dimethyl, cumyluron, dichlobenil, dinitramine, dithiopyr, Dymron, ethalfluralin, etobenzanide, methiozolin, methyldymron, oryzalin, oxaziclomefone, pendimethalin, propham, propyzamide, pyributicarb, sodium chlorate chlorate), tetflupyrolimet, thiazopyr, triaziflam, and trifluralin.

[0022] Examples of photosynthesis inhibitors include ametryn, atrazine, bentazon, bromacil, bromoxynil, bromofenoxim, chlorbromuron, chloridazon, chlorotoluron, chloroxuron, cyanazine, and desmedipham. m), desmetryn, dimefuron, dimethametryn, diuron, ethidimuron, fenuron, fluometuron, hexazinone, ioxynil, isoproturon, isouron, carbutilate, lenacil, linuron inuron, metamitron, methabenzthiazuron, metobromuron, metoxuron, metribuzin, monolinuron, neburon, pentanochlor, phenmedipham, prometon, prometryn, propanil 1), propazine, pyridafol, pyridate, quinoclamine, siduron, simazine, simetryn, tebuthiuron, terbacil, terbumeton, terbuthylazine, terbutryn, and trietazine.

[0023] Examples of PPO inhibitors include acifluorfen, azafenidin, benzfendizone, bifenox, butafenacil, carfentrazone-ethyl, chlomethoxyfen, chlorphthalim, cinidon-ethyl, cyclopyranil, fluazolate, flufenpyr-ethyl, flumiclorac-pentyl, and flumioxazin. Examples of such antiperspirants include fluoroglycofen-ethyl, fluthiacet-methyl, fomesafen, halosafen, lactofen, oxadiazon, oxadiargyl, oxyfluorfen, pentoxazone, profluazol, pyraclonil, pyraflufen-ethyl, saflufenacil, sulfentrazone, and thidiazimin.

[0024] Examples of whitening agents include aclonifen, amitrole, beflubutamid, benzobicyclon, benzofenap, bicyclopyrone, clomazone, cyclopyrimorate, diflufenican, fenquinotrione, fluridone, flurochloridone, flurtamone, and ipto. Examples include riazopyrid, isoxachlortole, isoxaflutole, mesotrione, norflurazon, picolinafen, pyrasulfotole, pyrazolate, pyrazoxyfen, sulcotrione, tefuryltrione, tembotrione, and topramezone.

[0025] Examples of VLCFAs inhibitors include acetochlor, alachlor, anilofos, benfuresate, butachlor, butyrate, cafenstrole, dimepiperate, dimesulfazet, and dimethachlor. thachlor), dimethenamide, dimethenamide-P, EPTC, esprocarb, ethofumesate, fenoxasulfone, fentrazamide, flufenacet, hexylthiocarbam, indanofan (indanofan), ipfencarbazone, mefenacet, metazachlor, molinate, orbencarb, pebulate, pesoxamid, piperophos, pretilachlor, propachlor r), propisochlor, prosulfocarb, pyroxasulfone, S-metolachlor, thenylchlor, thiobencarb, thiocarbazil, triallate, and vernolate.

[0026] Examples of hormone action inhibitors and disruptors include 2,3,6-TBA, 2,4-D, 2,4-DB, 2,4-PA ethyl (2,4-PA-ethyl), aminocyclopyrachlor, aminopyralid, benazolin, chloramben, clomeprop, clopyralid, dicamba, dichlorprop, and diflufenzopyr. ufenzopyr, florpyrauxifen-benzyl, fluroxypyr-1-methylheptylester, MCPA, MCPB, mecoprop, naptalam, phenothiol, picloram, quinclorac, quinmerac, and triclopyr.

[0027] Examples of ACCase inhibitors include alloxydim, butroxydim, clethodim, clodinafop-propargyl, cycloxydim, cyhalofop-butyl, diclofop-methyl, fenoxaprop-P-ethyl, fluazifop-P-butyl, and fluazifop-P-butyl. zifop-P-butyl, haloxyfop-P-methyl, metamifop, pinoxaden, profoxydim, propaquizafop, quizalofop-P-ethyl, sethoxydim, tepraloxydim, and tralkoxydim.

[0028] Examples of plant growth regulators (plant growth regulating active ingredients) include hymexazole, paclobutrazol, uniconazole-P, inabenfide, and prohexadione calcium.

[0029] Examples of fungicides (fungicidal active ingredients) include polyhaloalkylthio fungicides (such as captan), organophosphate fungicides (such as IBP, EDDP, and tolclofosmethyl), benzimidazole fungicides (such as benomyl, carbendazim, and thiophanate methyl), carboxyamide fungicides (such as mepronil, flutolanil, thifluzamide, furametpyr, tecloftalam, pencycuron, carpropamid, and diclocymet), acylalanine fungicides (such as metalaxyl), and azole fungicides (such as triflumizole, ipconadil, pefurazoate, progloraz, etc.), methoxyacrylic acid fungicides (azoxystrobin, metominostrobin, etc.), antibiotic fungicides (validamycin A, blasticidin S, kasugamycin, polyoxin, etc.), other fungicides (fthalide, probenazole, isoprothiolane, tridiclazole, pyroquilon, ferimzone, acibenzolar-S-methyl, diclomedine, oxolinic acid, phenazine oxide, TPN (chlorothalonil), iprodione, etc.).

[0030] Examples of insecticides (insecticidal active ingredients) include organophosphate insecticides (fenthion, fenitrothion, pirimiphos-methyl, diazion, quinalphos, isoxathion, pyridaphenthion, chlorpyrifos-methyl, vamidothion, malathion, phenthoate, dimethoate, disulfoton, monocrotophos, tetrachlorvinphos, chlorfenvinphos, propaphos, acephate, trichlorfon, EPN, pyraclofos, etc.), carbamate insecticides (carbaryl, metolcarb, isoprocarb, BPMC, propoxur, XM C, carbofuran, carbosulfan, benfuracarb, furathiocarb, methomyl, thiodicarb, etc.), synthetic pyrethroid insecticides (cycloprothrin, etofenprox, etc.), nereistoxin insecticides (cartap, bensultap, thiocyclam, etc.), neonicotinoid insecticides (imidacloprid, nitenpyram, acetamiprid, thiamethoxam, thiacloprid, dinotefuran, clothianidin, etc.), other insecticides (buprofezin, tebufenozide, fipronil, ethiprole, etc.), etc.

[0031] Examples of acaricides (acaricidal active ingredients) include hexythiazox, pyridaben, fenpyroximate, tebufenpyrad, chlorfenapyr, etoxazole, and pyrimidifen.

[0032] Examples of nematicides (nematicidal active ingredients) include fosthiazate.

[0033] The pesticide active ingredient is preferably a herbicidal active ingredient, more preferably benzobicyclon and / or pentoxazone, and particularly preferably benzobicyclon. The pesticide active ingredient is not particularly limited, and is preferably at least one selected from the group consisting of benzobicyclon, pentoxazone, cafenstrole, fenquinotrione, pyraclonil, florpyrauxifenbenzyl, fentrazamide, pyriftalid, tefuryltrione, triafamone, propyrisulfuron, cyclopyrimorate, ipfencarbazone, imazosulfuron, and penoxsulam, more preferably at least one selected from the group consisting of benzobicyclon, pentoxazone, florpyrauxifenbenzyl, and triafamone, and most preferably a combination of benzobicyclon, pentoxazone, and triafamone, or a combination of benzobicyclon, florpyrauxifenbenzyl, and triafamone. The pesticide active ingredient may be a combination of benzobicyclon and pentoxazone.

[0034] The pesticide active ingredient may generally have a water solubility of 50 mg / ml or less at 20° C., preferably in the range of 0.00001 to 10 mg / ml, and particularly preferably in the range of 0.00001 to 1 mg / ml.

[0035] The pesticidal active ingredient may be in the form of a powder. The average particle size (D50) of the pesticidal active ingredient is not particularly limited, but from the viewpoint of uniformity of the water-floating pesticide composition, it is preferably 1 to 150 μm, more preferably 2 to 50 μm, and most preferably 2 to 10 μm. The average particle size (D50) of the pesticidal active ingredient can be measured under dry conditions using a laser diffraction particle size distribution analyzer.

[0036] The content of such a pesticidal active ingredient may usually be 0.1 to 80% by weight, preferably 0.1 to 50% by weight, and more preferably 0.2 to 30% by weight, based on the total weight of the water-floating pesticidal composition. The content of the pesticidal active ingredient can be set appropriately depending on the properties of the pesticidal active ingredient used.

[0037] (Fibrous material) The fibrous material includes an aggregate of microfibrils made of cellulose. The fibrous material may be composed of an aggregate of microfibrils made of cellulose. The fibrous material may contain fibers other than the above-mentioned microfibrils. The fibrous material can be added as a disintegration aid. The aggregate of microfibrils made of cellulose may be microfibrils made of α-cellulose. The aggregate of microfibrils can be confirmed as a single particle (primary particle) by microscopic observation.

[0038] Common plant fibers (α-cellulose) are aggregates of countless microfibrils (ultrafine fibers) and are classified into quasicrystalline regions and crystalline regions. The quasicrystalline regions are aggregates of amorphous cellulose chains and are flexible. On the other hand, in the crystalline regions, the microfibrils are bonded in a certain direction and are dense and rigid. The microfibrils in this embodiment may include both quasicrystalline regions and crystalline regions, or may not include quasicrystalline regions and may include crystalline regions.

[0039] The fiber length of the microfibrils is 10 to 1000 μm, preferably 25 to 800 μm, and more preferably 40 to 600 μm. The fiber length of the microfibrils can be measured by a general method such as a microscopic method. For commercially available fiber products, the value listed in the manufacturer's pamphlet can be used as the fiber length. The average fiber length of the microfibrils can be determined based on the measured fiber length. Specifically, the average fiber length can be obtained by a microscopic method using a digital microscope, VHX-6000, manufactured by Keyence Corporation, for microscopic observation.

[0040] The microfibrils may contain or consist of microfibrils derived from wheat, beet, pulp, corn, soybean, pea, oat, bamboo, sugarcane, potato, apple, psyllium, or rice. These microfibrils can be used alone or in combination of two or more. Examples of commercially available fibers containing these microfibrils include VITACEL® WF600 / 30, VITACEL® WF600, VITACEL® WF200, VITACEL® HF600 / 30, VITACEL® HF600, and VITACEL® HF200 (all manufactured by Rettenmeyer Japan Co., Ltd.), which are described in the Examples section below. These microfibrils may contain both paracrystalline and crystalline regions.

[0041] The microfibrils may contain or consist of crystalline cellulose. Crystalline cellulose is obtained by partially depolymerizing α-cellulose obtained from fibrous plants such as pulp with a mineral acid to isolate and refine the cellulose crystalline region. Crystalline cellulose is obtained by hydrolyzing (depolymerizing) raw fibers and then separating and removing the amorphous portion, resulting in a crystalline fiber containing only fiber bundles. The microfibrils contained in crystalline cellulose may contain crystalline regions but not paracrystalline regions. A commercially available product, Arbocel (registered trademark) B800 (manufactured by Rettenmeyer Japan Co., Ltd.), described in the Examples section below, can be used as a fibrous material containing crystalline cellulose. The microfibrils may contain both the microfibrils derived from wheat, beet, pulp, corn, soybeans, peas, oats, bamboo, sugarcane, potato, apple, psyllium, or rice, as well as the crystalline cellulose. Alternatively, the microfibrils may consist of both the microfibrils derived from wheat, beet, pulp, corn, soybeans, peas, oats, bamboo, sugarcane, potato, apple, psyllium, or rice.

[0042] The fiber is not particularly limited, but may contain insoluble dietary fiber at a content of 70% or more. If the insoluble dietary fiber content is low, the proportion of soluble dietary fiber such as starch, polysaccharides, and pectin will be relatively high, which may reduce the desired effect. The insoluble dietary fiber content in the fiber can be determined by a general official method such as the Prosky method. The insoluble dietary fiber content is more preferably 75% or more, even more preferably 85% or more, and most preferably 95% or more. The above-mentioned commercially available VITACEL® and ARBOCEL® products contain insoluble dietary fiber at a content of 70% or more.

[0043] The content of the fiber in the entire water-floating pesticide composition is not particularly limited, but is preferably 1 to 15% by weight, more preferably 5 to 15% by weight, and most preferably 5 to 10% by weight. When the content of the fiber falls within the above range, the time required for the particles to disintegrate is shortened.

[0044] In addition to the above-mentioned fibers, other insoluble fibers may be contained. Examples of other insoluble fibers include common fibers such as agar, carrageenan, and cellulose. These other insoluble fibers can be appropriately blended in an amount that does not impair the effects of the present invention.

[0045] (Acetylene glycol surfactant) The acetylene glycol surfactant can be added as a spreading agent. Examples of the acetylene glycol surfactant include acetylene glycol compounds represented by the following formula (1), i.e., at least one of acetylene glycol and acetylene glycol derivatives:

[0046]

[0047] [In formula (1), R １ and R ４ are each an alkyl group or an aryl group having 1 to 20 carbon atoms, and may be the same or different. ２ and R ３are each an alkyl group having 1 to 3 carbon atoms, and may be the same or different from each other. Furthermore, m and n are each a positive number of 0 or 30 or less.

[0048] In the above formula (1), as described above, R １ and R ４ are each an alkyl group or an aryl group having 1 to 20 carbon atoms, and R ２ and R ３ are each an alkyl group having 1 to 3 carbon atoms. １ and R ４ , R ２ and R ３ may be the same as or different from each other. １ and R ４ are each independently preferably an alkyl group having 1 to 15 carbon atoms, more preferably an alkyl group having 1 to 10 carbon atoms, and most preferably an alkyl group having 1 to 5 carbon atoms. １ and R ４ are each independently preferably a butyl group, more preferably an isobutyl group. ２ and R ３ may each independently be a methyl group.

[0049] The average number of moles (m+n) of ethylene oxide units added in the acetylene glycol compound represented by the above formula (1) is preferably 0 to 30 moles, more preferably 0 to 10 moles, and most preferably 0 to 4 moles.

[0050] In the above formula (1), R １ and R ４ are each independently an alkyl group having 1 to 5 carbon atoms, R ２ and R ３ may each independently represent an alkyl group having 1 to 3 carbon atoms, and the average number of moles of ethylene oxide units added (m+n) may be 0 to 30 moles. １ and R ４ is a methyl group, R ２ and R ３ may be an isobutyl group, and the average number of moles of ethylene oxide units added (m+n) may be 0 to 30 moles.

[0051] In the acetylene glycol compound represented by the above formula (1), specific examples of acetylene glycols in which the average number of moles of ethylene oxide units added is 0 include 2,5,8,11-tetramethyl-6-dodecyne-5,8-diol, 5,8-dimethyl-6-dodecyne-5,8-diol, 2,4,7,9-tetramethyl-5-decyne-4,7-diol, 4,7-dimethyl-5-decyne-4,7-diol, 2,3,6,7-tetramethyl-4-octyne-3,6-diol, 3,6-dimethyl-4-octyne-3,6-diol, 2,5-dimethyl-3-hexyne-2,5-diol, etc. These acetylene glycol compounds can be used alone or in combination of two or more.

[0052] In the acetylene glycol compound represented by the above formula (1), the acetylene glycol derivative, i.e., the ethoxylated acetylene glycol compound, can be, for example, an ethoxylated 2,4,7,9-tetramethyl-5-decyne-4,7-diol (average total number of added moles of ethylene oxide: m+n, in the above formula (1), R １ and R ４ is an isobutyl group, R ２ and R ３ In addition, examples of ethoxylated acetylene glycol compounds include ethylene oxide derivatives of acetylene glycol, such as ethoxylated 2,5,8,11-tetramethyl-6-dodecyne-5,8-diol (average total number of moles of ethylene oxide added: 6), ethoxylated 2,4,7,9-tetramethyl-5-decyne-4,7-diol (average total number of moles of ethylene oxide added: 10), ethoxylated 2,4,7,9-tetramethyl-5-decyne-4,7-diol (average total number of moles of ethylene oxide added: 4), and ethoxylated 3,6-dimethyl-4-octyl-3,6-diol (average total number of moles of ethylene oxide added: 4). Particularly preferred is an ethoxylated product of 2,4,7,9-tetramethyl-5-decyne-4,7-diol (average total number of moles of ethylene oxide added: 1.3, R １ and R ４ is an isobutyl group, R２ and R ３ is a methyl group, m+n=1.3), an ethoxylated product of 2,4,7,9-tetramethyl-5-decyne-4,7-diol (average total number of moles of ethylene oxide added: 3.5, in formula (1), R １ and R ４ is an isobutyl group, R ２ and R ３ is a methyl group, and m+n=3.5). These acetylene glycol compounds can be used alone or in combination of two or more.

[0053] The content of the acetylene glycol surfactant in the entire water-floating pesticide composition is not particularly limited, but is preferably more than 0% by weight and not more than 5% by weight, more preferably 0.1 to 3% by weight, and most preferably 0.5 to 3% by weight. By having the acetylene glycol surfactant content within the above numerical range, the particles can be dispersed throughout the paddy field without agglomeration. The content of the acetylene glycol surfactant may be 1 to 5% by weight or 2 to 5% by weight.

[0054] (Other Components) The water-floating pesticide composition may further contain a powder of a poorly soluble salt. The poorly soluble salt may be selected from calcium monohydrogen phosphate, calcium trihydrogen phosphate, calcium carbonate, silicon dioxide, and calcium dihydrogen pyrophosphate. These poorly soluble salts may be used alone or in combination of two or more.

[0055] The water-floating pesticide composition may further contain a dispersant. The dispersant may be a dispersant other than the above-mentioned acetylene glycol surfactant. Examples of dispersants include nonionic surfactants, anionic surfactants, cationic surfactants, amphoteric surfactants, and other surfactants. Examples of nonionic surfactants include polyethylene glycol surfactants, polyhydric alcohol surfactants, and alkyl glycosides. Examples of anionic surfactants include carboxylic acid surfactants, sulfate ester surfactants, sulfonic acid surfactants, and phosphate ester surfactants. These anionic surfactants may be in the form of a salt, and examples of such salts include alkali metals (lithium, sodium, potassium, etc.), alkaline earth metals (calcium, magnesium, etc.), ammonium, and various amines (e.g., alkylamines, cycloalkylamines, alkanolamines, etc.). Examples of carboxylic acid surfactants include polycarboxylic acid surfactants. Examples of sulfonic acid surfactants include lignosulfonate sodium salt and alkylnaphthalenesulfonate formaldehyde condensate metal salts. In particular, it is preferable to use a polycarboxylic acid surfactant and lignosulfonate sodium salt in combination. Examples of cationic surfactants include alkylamines, alkyl quaternary ammonium salts, ethylene oxide adducts of alkylamines, and ethylene oxide adducts of alkyl quaternary ammonium salts. Examples of amphoteric surfactants include betaine surfactants and amino acid surfactants. Examples of other surfactants include silicone surfactants and fluorine surfactants. These dispersants described above can be used alone or in combination of two or more.

[0056] The content of the dispersant in the entire water-floating pesticide composition is not particularly limited, but is preferably 0 to 10% by weight, more preferably 0.5 to 8% by weight, and most preferably 2 to 6% by weight. When the content of the dispersant is within the above range, the particles can be dispersed as fine particles when they disintegrate.

[0057] The water-floating pesticide composition may further contain a wetting agent. The wetting agent is not particularly limited, and examples thereof include metal dioctyl sulfosuccinate, metal alkylbenzenesulfonate, and metal alkylnaphthalenesulfonate. Among these, metal dioctyl sulfosuccinate is preferred.

[0058] The content of the wetting agent in the entire water-floating pesticide composition is not particularly limited, and is preferably 0 to 5 wt %, more preferably 0.1 to 4 wt %, and most preferably 0.2 to 3 wt %. When the content of the wetting agent is within the above range, the active ingredient (pesticide active ingredient) contained in the water-floating pesticide composition is wetted, and therefore, after the particles disintegrate, the active ingredient can be quickly suspended in water.

[0059] The water-floating pesticide composition may further contain a binder. Examples of binders include dextrin, water-soluble starch, salts of carboxymethylcellulose (such as sodium salts), polyvinyl alcohol or its derivatives, water-soluble polymers such as sodium alginate, xanthan gum, and gum arabic. Among these, dextrin is preferred. These binders may be used alone or in combination of two or more. The water-floating pesticide composition may not contain carboxymethylcellulose or a salt thereof. In this specification, "not containing" a specific component means that the component is not intentionally added, and may include embodiments in which the component is contained as an impurity.

[0060] The content of the binder in the entire water-floating pesticide composition is not particularly limited, but is preferably 0 to 5% by weight, more preferably 1 to 5% by weight, and most preferably 2 to 5% by weight. By having the binder content within the above numerical range, the moldability of the granules can be improved and powdering during drying or product transportation can be suppressed.

[0061] The water-floating pesticide composition may further contain a floating carrier. As the floating carrier, various inorganic floating carriers and organic floating carriers having a buoyancy of less than 1 in specific gravity can be used. Examples of inorganic floating carriers include hollow glass, foamed whitebait, foamed pumice, and foamed perlite. Examples of organic floating carriers include foamed synthetic resins (including plastic microhollow bodies), synthetic resin powders such as polyethylene powder and polypropylene powder, paraffin wax, waxy substances derived from plants and animals, cork, and wood flour. Among these, plastic microhollow bodies, foamed whitebait, and hollow glass are preferred, with plastic microhollow bodies being particularly preferred. Examples of materials for the shell of plastic microhollow bodies include vinylidene chloride-acrylonitrile resin, acrylonitrile resin, and acrylic resin. These floating carriers can be used alone or in combination of two or more.

[0062] The content of the floating carrier in the entire water-floating pesticide composition is not particularly limited, and is preferably 0 to 30% by weight, more preferably 0 to 20% by weight, and most preferably 10 to 20% by weight. When the content of the floating carrier is within the above numerical range, the particles can stably float on the water surface without settling.

[0063] The water-floating pesticide composition may further contain a bulking agent. The bulking agent in the entire water-floating pesticide composition may be the remainder of the composition other than the other components (such as the above-mentioned pesticide active ingredient, fiber, acetylene glycol surfactant, dispersant, wetting agent, binder, floating carrier, etc.). Examples of bulking agents include organic acids (such as citric acid, succinic acid, maleic acid, etc.) or their salts, water-soluble carriers such as urea and sugars (such as lactose, glucose, sucrose, etc.), plant powders (such as soybean flour, tobacco powder, wheat flour, wood flour, etc.), mineral or inorganic powders (such as clays such as kaolin, bentonite, acid clay, and clay; talcs such as talc powder and pyrotechnic powder; silicas such as diatomaceous earth and mica powder; white carbon, alumina, sulfur powder, activated carbon, potassium chloride, ammonium sulfate, sodium bicarbonate, sodium sulfate, calcium carbonate, magnesium carbonate, etc.). Among these, white carbon, clay, bentonite, calcium carbonate, etc. are preferred, with white carbon, clay and / or bentonite being particularly preferred, and a combination of white carbon, clay, and bentonite being most preferred. The bulking agent may be a combination of clay and bentonite. These bulking agents may be used alone or in combination of two or more. The floating carriers described above may also be used as bulking agents. When white carbon is used as a bulking agent, the content of white carbon in the entire water-floating pesticide composition is not particularly limited, and is preferably 1 to 15 wt%, more preferably 2 to 10 wt%, and most preferably 3 to 5 wt%. By ensuring that the white carbon content is within the above numerical range, the disintegration time of the particles can be appropriately adjusted.

[0064] (Production method, use form, etc.) The water-floating pesticide composition of this embodiment can be produced by a conventional production method, for example, by mixing a pesticide active ingredient, fibrous material, an acetylene glycol surfactant, and any other ingredients, adding an appropriate amount of water, kneading, molding by a method such as extrusion granulation, drying, sieving, and the like.

[0065] As described above, the water-floating pesticide composition can also be encapsulated in a water-soluble film. The bag-shaped pesticide formulation thus formed consists of a water-floating pesticide composition and a water-soluble film encapsulating the composition. As described above, the particles of the water-floating pesticide composition are densely packed inside the bag-shaped pesticide formulation, making them prone to aggregation during spraying. Therefore, the bag-shaped pesticide formulation is particularly required to have excellent diffusibility. The water-soluble film may be any film that dissolves or disperses in water, such as films or sheets made from polyvinyl alcohol or its derivatives, pullulan, carboxymethylcellulose salts (such as sodium salts), water-soluble cellulose derivatives, polyethylene oxide or its derivatives. Among these, films or sheets made from polyvinyl alcohol or its derivatives are preferred.

[0066] (Method of Use) The water-floating pesticide composition of this embodiment can be sprayed by conventional methods such as manual spraying or mechanical spraying, like ordinary pesticide formulations, and can also be applied from a water inlet. In addition, the water-floating pesticide composition of this embodiment can be encapsulated in a water-soluble film to form a bag-shaped pesticide formulation, which can be applied by throwing it from the ridge, etc.

[0067] The method for using the water-floating pesticide composition of this embodiment includes a step of spraying the water-floating pesticide composition on a paddy field.

[0068] The spraying can be carried out by an aircraft. The aircraft is not particularly limited, and examples thereof include fixed-wing aircraft such as small light aircraft, rotary-wing aircraft such as manned helicopters and unmanned helicopters, tilt-rotor aircraft having both fixed and rotary wings, and agricultural multi-rotor aircraft (so-called drones) driven by motors and batteries. Among these aircraft, small unmanned helicopters and drones specialized for pesticide spraying are preferred.

[0069] The present invention will be specifically described below with reference to examples, but the present invention is not limited to the contents described in the examples.

[0070] (Raw Materials) The raw materials used in the preparation of the water-floating pesticide composition are shown below. <Pesticide active ingredient> Active ingredient A: Benzobicyclon (purity 99.0%, manufactured by SDS Biotech Co., Ltd.) Active ingredient B: Pentoxazone (purity 99.5%, manufactured by Kaken Pharmaceutical Co., Ltd.) Active ingredient C: Cafenestrol (purity 99.3%, manufactured by SDS Biotech Co., Ltd.) Active ingredient D: Fenquinotrione (purity 99.5%) Active ingredient E: Pyraclonil (purity 96.5%) Active ingredient F: Florpyrauxifenbenzyl (purity 94.8%) Active ingredient G: Fentrazamide (purity 70.1%) Active ingredient H: Piriftalid (purity 99.0%) Active ingredient I: Tefuryltrione (purity 99.1%) Active ingredient J: Triafamone (purity 98.2%) Active ingredient K: Propyrisulfuron (purity 98.4%) Active ingredient L: Cyclopirimorate (purity 98.4%) Active ingredient M: Ipfencarbazone (purity 99.5%) Active ingredient N: Imazosulfuron (purity 99.3%) Active ingredient O: Penoxsulam (purity 98.0%) The active ingredients D to O can be synthesized based on known prior art documents, or can be purchased as commercially available products.

[0071] <Disintegration aid> Fiber (1): VITACEL (registered trademark) WF600 / 30 (wheat-derived fiber, average fiber length: 30 μm, dietary fiber content: approximately 97%) (manufactured by Rettenmaier Japan Co., Ltd.) Fiber (2): VITACEL (registered trademark) WF600 (wheat-derived fiber, average fiber length: 80 μm, dietary fiber content: approximately 97%) (manufactured by Rettenmaier Japan Co., Ltd.) Fiber (3): VITACEL (registered trademark) WF200 (wheat-derived fiber, average fiber length: 250 μm, dietary fiber content: approximately 97%) (manufactured by Rettenmaier Japan Co., Ltd.) Fiber (4): VITACEL (registered trademark) HF600 / 30 (oat-derived fiber, average fiber length: 30 μm, dietary fiber content: approximately 96%) (manufactured by Rettenmaier Japan Co., Ltd.) Fiber (5): VITACEL (registered trademark) HF600 (oat-derived fiber, average fiber length: 80 μm, dietary fiber content: approximately 96%) (manufactured by Rettenmaier Japan Co., Ltd.) Fiber (6): VITACEL (registered trademark) HF200 (oat-derived fiber, average fiber length: 250 μm, dietary fiber content: approximately 96%) (manufactured by Rettenmaier Japan Co., Ltd.) Fiber (7): ARBOCEL (registered trademark) B800 (crystalline cellulose, shape: fiber, average fiber length: 130 μm) (manufactured by Rettenmaier Japan Co., Ltd.) Sodium carboxymethylcellulose: Celogen (registered trademark) 6A (Etherification degree: 0.70 to 0.80) (manufactured by Daiichi Kogyo Seiyaku Co., Ltd.)

[0072] <Spreader> Acetylene glycol surfactant (1): Surfynol (registered trademark) 440 (R in the above formula (1) １ and R ４ is an isobutyl group, R ２ and R ３ is a methyl group, m+n=3.5) (manufactured by Evonik) Acetylene glycol surfactant (2): Surfynol (registered trademark) 104PG50 (in the above formula (1), R １ and R ４ is an isobutyl group, R ２ and R ３is a methyl group, and m+n=0. The product contains 50% by weight of propylene glycol) (manufactured by Evonik Co., Ltd.) Acetylene glycol surfactant (3): Olfine (registered trademark) E1004 (in the above formula (1), R １ and R ４ is an isobutyl group, R ２ and R ３ is a methyl group, m+n=4) (manufactured by Nissin Chemical Industry Co., Ltd.) Acetylene glycol surfactant (4): Surfynol (registered trademark) 465 (in the above formula (1), R １ and R ４ is an isobutyl group, R ２ and R ３ is a methyl group, m+n=10) (manufactured by Evonik) Acetylene glycol surfactant (5): Surfynol (registered trademark) 485 (in the above formula (1), R １ and R ４ is an isobutyl group, R ２ and R ３ is a methyl group, m+n=30) (manufactured by Evonik) Polyoxyethylene (POE) alkanediol: Newkalgen TG-310 (manufactured by Takemoto Oil & Fat Co., Ltd.)

[0073] <Dispersant> Sodium ligninsulfonate: Newkalgen WG-4 (manufactured by Takemoto Yushi Co., Ltd.) Polycarboxylic acid surfactant: Toxanon GR-31A (water content: 57%) (manufactured by Sanyo Chemical Industries, Ltd.) <Wetting agent> Metal dioctyl sulfosuccinate: Newkalgen EP-70G (water content: approximately 15%) (manufactured by Takemoto Yushi Co., Ltd.) <Binder> Dextrin: Pinedex #1 (manufactured by Matsutani Chemical Industry Co., Ltd.) <Floating carrier> Acrylonitrile hollow body: Matsumoto Microsphere (registered trademark) MFL-81GCA (manufactured by Matsumoto Yushi Pharmaceutical Co., Ltd.) <Extender> Bentonite: Kunigel (registered trademark) V1 (manufactured by Kunimine Kogyo Co., Ltd.) Clay: NK-300 (manufactured by Showa KDE Co., Ltd.) White carbon: Carplex (registered trademark) #80 (manufactured by Evonik Japan Co., Ltd.)

[0074] [Examples 1 to 28 and Comparative Examples 1 to 18] (Preparation of Water-Floating Pesticide Compositions) The raw materials were mixed in the blending ratios shown in Tables 1 to 5 below, and the specified amount of water was added and further kneaded. The mixture was then granulated using an extrusion granulator (product name "Basket Breuser BR-150", manufactured by Dalton Co., Ltd.) equipped with a 1.5 mm screen and allowed to dry at 65°C for 1 hour. The resulting dried product was passed through standard sieves of 850 μm and 1700 μm to separate fine powders and lumps, yielding the water-floating pesticide compositions (granular, approximately 3 mg per granule) of Examples 1 to 28 and Comparative Examples 1 to 18. The values ​​in Tables 1 to 5 indicate parts by weight, and the details for each component are as follows: The values ​​for Active Ingredients A to O refer to the parts by weight of the active ingredient component itself, calculated taking purity into consideration. The values ​​for the polycarboxylic acid surfactant and dioctyl sulfosuccinate metal salt are parts by weight of the total (total of solids and water), and the values ​​for other components refer to parts by weight of the solids. The parts by weight of the solids for the polycarboxylic acid surfactant and dioctyl sulfosuccinate metal salt can be calculated based on the total parts by weight and the above-mentioned water content. The total value refers to the sum of the parts by weight of the solids of each component.

[0075] (Evaluation of Water-Floating Pesticide Compositions) The following evaluations of diffusibility and particle disintegration were carried out for each of the water-floating pesticide compositions of Examples 1 to 28 and Comparative Examples 1 to 18. The results are shown in Tables 1 to 5.

[0076] <Diffusion> Test method A container (70 cm length x 115 cm width x 20 cm height) was filled with water adjusted to 20°C to a water depth of 5 cm, and a hollow tube (6 cm diameter (inner diameter), 15 cm height, made of polypropylene) was placed in the center of the container and allowed to stand. 10 g of each water-floating pesticide composition was gently placed in the tube, and after 30 seconds, the tube was gently raised above the water and removed. Multiple particles of the water-floating pesticide composition were densely packed and adhered to each other to form aggregates within the tube. After the tube was removed, individual particles separated from the aggregates and spread over the water surface, gradually reducing in size over time. The measurement start time was the time when the tube was completely above water when removed, and the time required for the aggregates of the water-floating pesticide composition (the original aggregates formed in the tube) to become 2 cm or less was measured. The size of the aggregates was observed visually. The obtained measurement times were evaluated according to the following criteria: good (◯): less than 90 seconds, bad (Δ): 90 seconds or more but less than 180 seconds, extremely bad (×): 180 seconds or more. The shorter the measurement time in the evaluation of diffusibility, the easier it is for the particles to diffuse without agglomeration when the bag-type pesticide formulation (a water-floating pesticide composition encapsulated in a water-soluble film) is poured into a paddy field or the like.

[0077] <Disintegrability of Particles> Test Method 5 L of water adjusted to 20°C was added to a container (length 42 cm x width 31.5 cm x height 11 cm) and allowed to stand. Then, 1 g of each water-floating pesticide composition was poured into the center of the container. The poured water-floating pesticide composition immediately separated into individual particles, which then disintegrated, gradually reducing in size. The time when the water-floating pesticide composition was poured was taken as the measurement start time, and the time required for 90% of the poured water-floating pesticide composition (numerous particles) to disintegrate and disperse was measured. The state of particle disintegration was observed visually. The shorter the measurement time in the evaluation of particle disintegrability, the more easily the individual particles disintegrated. When the measurement time in the evaluation of particle disintegrability was 15 minutes or less, it can be said that the particle disintegrability was good.

[0078]

[0079]

[0080]

[0081]

[0082]

[0083] Examples 1 to 28 relate to water-floating pesticide compositions containing a pesticidal active ingredient, fibrous material (an aggregate of cellulose microfibrils, the average fiber length of the microfibrils being 10 to 1000 μm), and an acetylene glycol-based surfactant. Comparative Examples 1 and 13 relate to water-floating pesticide compositions containing sodium carboxymethylcellulose instead of the fibrous material. Comparative Examples 2 and 14 relate to water-floating pesticide compositions that do not contain the fibrous material. Comparative Examples 3 to 9 and 15 relate to water-floating pesticide compositions containing a POE alkanediol instead of the acetylene glycol-based surfactant. Comparative Examples 10 and 16 relate to water-floating pesticide compositions containing sodium carboxymethylcellulose instead of the fibrous material, and a POE alkanediol instead of the acetylene glycol-based surfactant. Comparative Examples 11 and 17 relate to water-floating pesticide compositions that do not contain the above-mentioned fibrous material and contain a POE alkanediol instead of the above-mentioned acetylene glycol surfactant.Comparative Examples 12 and 18 relate to water-floating pesticide compositions that do not contain either the above-mentioned fibrous material or the above-mentioned acetylene glycol surfactant.

[0084] The results in Tables 1 and 2 indicate that the water-floating pesticide compositions of Examples 1 to 14 are easily dispersed, as the measurement time for the evaluation of diffusibility was short and favorable. Furthermore, the measurement time for the evaluation of particle disintegration was short for the water-floating pesticide compositions of Examples 1 to 14, indicating that individual particles easily disintegrate. Furthermore, the results of Examples 1 to 7 indicate that even when the type of fiber was changed, the diffusibility and particle disintegration remained good and did not change. Furthermore, the results of Examples 6 and 8 to 11 indicate that the diffusibility and particle disintegration were good regardless of which of the acetylene glycol-based surfactants (1) to (5) was used. Among these, the ranking of the compositions with better diffusibility and particle disintegration was: acetylene glycol-based surfactant (1) > acetylene glycol-based surfactant (2) > acetylene glycol-based surfactant (3) > acetylene glycol-based surfactant (4) > acetylene glycol-based surfactant (5). In addition, the results of Examples 6 and 12 to 14 showed that the diffusibility and particle disintegration properties were good even when the content of the acetylene glycol surfactant was changed. In particular, the diffusibility and particle disintegration properties tended to be better when the content of the acetylene glycol surfactant was increased.

[0085] On the other hand, from the results of Table 3, it was found that the water-floating pesticide compositions of Comparative Examples 2 and 5 to 8 had a short and favorable measurement time in the evaluation of diffusibility, but the measurement time in the evaluation of particle disintegration was long, and individual particles were difficult to disintegrate. Also, it was found that the water-floating pesticide compositions of Comparative Examples 1, 3, 4, 9, 11, and 12 had a long measurement time in the evaluation of diffusibility, were difficult to diffuse, and the measurement time in the evaluation of particle disintegration was long, and individual particles were difficult to disintegrate. Furthermore, it was found that the water-floating pesticide composition of Comparative Example 10 had a short measurement time in the evaluation of particle disintegration, and individual particles were easy to disintegrate, but the measurement time in the evaluation of diffusibility was long, and it was difficult to diffuse.

[0086] The results in Table 4 show that the water-floating pesticide compositions of Examples 15 to 28 are easily dispersed, as the measurement time for the evaluation of diffusibility is short and favorable. Furthermore, the water-floating pesticide compositions of Examples 15 to 28 are easily dispersed, as the measurement time for the evaluation of particle disintegration is short, and individual particles are easily disintegrated. Furthermore, the results of Examples 15 to 28 show that even if the type of pesticide active ingredient is changed, the diffusibility and particle disintegration remain good and do not change. Furthermore, a comparison of Examples 1 to 14 (especially Example 6) in Tables 1 and 2 with Example 15 in Table 4 shows that even if the amount of floating carrier and the type and amount of bulking agent added are changed, the diffusibility and particle disintegration remain good and do not change.

[0087] On the other hand, from the results of Table 5, it was found that the water-floating pesticide compositions of Comparative Examples 13 and 16 had a short measurement time in the evaluation of particle disintegration, and individual particles were easily disintegrated, but the measurement time in the evaluation of diffusibility was extremely long, at 180 seconds or more, and extremely difficult to disperse. Also, the water-floating pesticide composition of Comparative Example 14 had a short and good measurement time in the evaluation of diffusibility, but the measurement time in the evaluation of particle disintegration was long, and individual particles were not easily disintegrated. Furthermore, the water-floating pesticide compositions of Comparative Examples 15 and 17 had a long measurement time in the evaluation of diffusibility, at 90 seconds or more but less than 180 seconds, and were difficult to disperse, and the measurement time in the evaluation of particle disintegration was long, and individual particles were not easily disintegrated. In addition, it was found that the water-floating pesticide composition of Comparative Example 18 had a very long measurement time in the evaluation of diffusibility, at 180 seconds or more, and was extremely difficult to disperse, and the measurement time in the evaluation of particle disintegration was long, and individual particles were not easily disintegrated.

[0088] From the above, it was found that the water-floating pesticide composition of the present invention is excellent in diffusibility and particle disintegration property.

Claims

1. A water-floating pesticide composition comprising a pesticide active ingredient, a fiber, and an acetylene glycol-based surfactant, wherein the fiber comprises an aggregate of microfibrils made of cellulose, and the microfibrils have an average fiber length of 10 to 1000 μm.

2. The water-floating pesticide composition according to claim 1, wherein the microfibrils comprise microfibrils derived from wheat, beet, pulp, corn, soybean, pea, oat, bamboo, sugarcane, potato, apple, psyllium, or rice.

3. The water-floating pesticide composition according to claim 1 or 2, wherein the microfibrils contain crystalline cellulose.

4. The water-floating pesticide composition according to any one of claims 1 to 3, wherein the fiber contains insoluble dietary fiber at a content of 70% or more.

5. The water-floating pesticide composition according to any one of claims 1 to 4, wherein the content of said fiber in the entire water-floating pesticide composition is 1 to 15% by weight.

6. The water-floating pesticide composition according to any one of claims 1 to 5, wherein the acetylene glycol surfactant is an acetylene glycol compound represented by the following formula (1): [In the formula (1), R １ and R ４ are each an alkyl group or an aryl group having 1 to 20 carbon atoms, and may be the same or different from each other; R ２ and R ３ are each an alkyl group having 1 to 3 carbon atoms, and may be the same or different from each other; and m and n are each a positive number of 0 or 30 or less.

7. In the formula (1), R １ and R ４ are each independently an alkyl group having 1 to 5 carbon atoms, and R ２ and R ３ are each independently an alkyl group having 1 to 3 carbon atoms, and the average number of moles of ethylene oxide units added (m+n) is 0 to 30 moles.

8. In the formula (1), R １ and R ４ is a methyl group, and R ２ and R ３ The water-floating pesticide composition according to claim 7, wherein m is an isobutyl group, and the average number of moles of ethylene oxide units added (m+n) is 0 to 30 moles.

9. The water-floating pesticide composition according to any one of claims 1 to 8, wherein the content of the acetylene glycol surfactant in the entire water-floating pesticide composition is more than 0% by weight and not more than 5% by weight.

10. The water-floating pesticide composition according to any one of claims 1 to 9, which is encapsulated in a water-soluble film.

11. The water-floating pesticide composition according to claim 10, wherein the water-soluble film comprises polyvinyl alcohol.

12. The water-floating pesticide composition according to any one of claims 1 to 11, which is in the form of a granule.

13. The water-floating pesticide composition according to any one of claims 1 to 12, further comprising white carbon.

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