WO2025197948A1 - Agrochemical composition that floats on water - Google Patents

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

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

The method of using a water-floating pesticide composition (water-floating pesticide granules) containing a flotation aid to give it a specific gravity of less than 1 as a pesticide granule has been established as a technique for distributing the pesticide active ingredients throughout the field by applying it to paddy fields, etc., and allowing it to float and diffuse on the water surface.

Water-floating pesticide compositions can be sprayed directly onto rice paddies, but they can also be encapsulated in a water-soluble film and applied to the paddy field as a bagged pesticide formulation. After the bagged pesticide formulation (jumbo formulation) is applied to the paddy field, the water-soluble film quickly dissolves, allowing the encapsulated water-floating pesticide composition to float on the water surface and spread throughout the paddy field, distributing the active pesticide ingredients.

Water-floating pesticide compositions are required to have particles that do not clump together and are easily dispersed (excellent diffusibility) when applied to paddy fields, etc. When the above-mentioned bagged pesticide formulation is used, the particles are densely packed inside the bagged pesticide formulation, making them prone to clumping when sprayed. Therefore, bagged pesticide formulations are particularly required to have excellent diffusibility. Furthermore, in order to diffuse the pesticidal active ingredient in a water-floating pesticide composition throughout the paddy field, the individual particles of the composition are also required to disintegrate and disperse easily (excellent disintegrability).

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.

Patent No. 5709343

Although Patent Document 1 discloses that the water-floating pesticide granular composition has excellent floating and diffusibility on the water surface, it does not make any mention of the disintegration properties of the granules.
As described above, there is a need for a water-floating pesticide composition that is excellent in both diffusibility and particle disintegration properties.

The object of the present invention is to provide a water-floating pesticide composition that has excellent diffusibility and granule disintegration properties.

As a result of intensive research to solve the above problems, the inventors discovered that the above problems can be solved by using a specific fiber and an acetylene glycol-based surfactant, and thus completed the present invention.
Specific embodiments of the present invention are as follows.

[1]
pesticide active ingredients,
A water-floating pesticide composition comprising: a 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 1000 μm.
[2] The water-floating pesticide composition according to [1], wherein the microfibrils include 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 contain crystalline cellulose.
[4] The water-floating pesticide composition according to any one of [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 [1] to [4], wherein the content of the 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 [1] to [5], wherein the acetylene glycol surfactant is an acetylene glycol compound represented by the following formula (1):
[In the formula (1),
^R1 and ^R4 each represent an alkyl group or an aryl group having 1 to 20 carbon atoms, and may be the same or different from each other;
^R2 and ^R3 are each an alkyl group having 1 to 3 carbon atoms and may be the same or different from each other;
m and n are each a positive number of 0 or 30 or less.
[7] In the formula (1), R ¹ and R ⁴ each independently represent an alkyl group having 1 to 5 carbon atoms, R ² and R ³ 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) is 0 to 30 moles. The water-floating pesticide composition according to [6].
[8] In the formula (1), R ¹ and R ⁴ are methyl groups, R ² and R ³ are isobutyl groups, and the average number of moles of ethylene oxide units added (m+n) is 0 to 30 moles. The water-floating pesticide composition according to [7].
[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 5% by weight or less.
[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 a granule.
[13] The water-floating pesticide composition according to any one of [1] to [12], further comprising white carbon.

[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 water-floating pesticide composition as a whole is 0.1 to 80% by weight, preferably 0.1 to 50% by weight, and more preferably 0.2 to 30% by weight.

[19] A method for using a water-floating pesticide composition, comprising a step of spraying the water-floating pesticide composition according to any one of [1] to [18] on a paddy field.
[20] The method according to [19], wherein the water-floating pesticide composition is sprayed by an aircraft.
[21] The method according to [20], wherein the aircraft is a drone.

The water-floating pesticide composition of the present invention has excellent diffusibility and granule disintegration properties.

In this specification, when a numerical range is expressed using "X to Y," the range is intended to include both end values.
In this specification, the term "diffusibility" means the property of the particles to diffuse into the surroundings without agglomerating when a 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, the term "disintegrability" means the property of individual particles of a water-floating pesticide composition to disintegrate and disperse after spreading when the composition is applied to a paddy field or the like directly or in the form of a bag-shaped pesticide formulation.

The water-floating pesticide composition of the present invention will now be described.

<Water-floating pesticide composition>
The water-floating pesticide composition of the present invention comprises:
pesticide active ingredients,
The present invention comprises a fiber and an acetylene glycol surfactant, the fiber being 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 above-mentioned fiber and the above-mentioned acetylene glycol surfactant in combination, it is possible to achieve both good diffusibility and good disintegration properties of the particles of the water-floating pesticide composition.

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

(pesticide active ingredient)
The pesticidal active ingredient is not particularly limited, and examples thereof include compounds that are the active ingredients of various conventionally known herbicides, plant growth regulators, fungicides, insecticides, acaricides, nematicides, etc. The pesticidal active ingredients can be used alone or in combination of two or more.

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

ALS inhibitors include, for example, amidosulfuron, azimsulfuron, bensulfuron-methyl, bispyribac, chlorimuron-ethyl, chlorsulfuron, and cinosulfuron. on), cloransulam-methyl, cyclosulfamuron, diclosulam, ethametsulfuron-methyl, ethoxysulfuron, flazasulfuron, florasulam m), flucarbazone, flumetsulam, flupyrsulfuron-methyl, foramsulfuron, halosulfuron-methyl, imazamethabenz-methyl, imazamox mox), imazapic, imazapyr, imazaquin, imazethapyr, imazosulfuron, iodosulfuron-methyl, iofensulfuron, iofensulfuron sodium n-sodium), metazosulfuron, metsulfuron-methyl, nicosulfuron, orthosulfamuron, oxasulfuron, penoxsulam, primisulfuron-methyl ethyl), propoxycarbazone, propyrisulfuron, prosulfuron, pyrazosulfuron-ethyl, pyribenzoxim, pyriftalid, pyriminobac-methyl thyl), pyrimisulfan, pyrithiobac, rimsulfuron, sulfometuron-methyl, sulfosulfuron, thiencarbazone-methyl, thifensulfuron-methyl Examples include triafamone, triasulfuron, tribenuron-methyl, trifloxysulfuron, triflusulfuron-methyl, and tritosulfuron.

Germination and elongation inhibitors include, for example, benfluralin, bromobutide, butamifos, butralin, carbetamide, chlorpropham, chlorthal-dimethyl, cumyluron, dichlobenil, dinitramine, dithiopyr, dymron, ethalfluralin, and etobenzanide. These include benzodiazepine, benzophenone, benzodiazepine, benzophenone, benzodiazepine, benzophenone-3, benzodiazepine, benzophenone-4, benzophenone-5, benzophenone-6, benzophenone-7, benzophenone-8, benzophenone-9, benzophenone-10, benzophenone-11, benzophenone-20, benzophenone-31, benzophenone-42, benzophenone-43, benzophenone-44, benzophenone-45, benzophenone-56, benzophenone-57, benzophenone-58, benzophenone-59, benzophenone-60, benzophenone-61, benzophenone-62, benzophenone-63, benzophenone-64, benzophenone-65, benzophenone-65, benzophenone-76, benzophenone-77, benzophenone-78, benzophenone-79, benzophenone-81, benzophenone-97, benzophenone-98, benzophenone-99, benzophenone-99, benzophenone-99, benzophenone-99, benzophenone-101, benzophenone-112, benzophenone-113, benzophenone-114, benzophenone-115, benzophenone-116, benzophenone-117, benzophenone-118, benzophenone-119, benzophenone-121, benzophenone-122, benzophenone-123, benzophenone-124, benzophenone-125, benzophenone-126, benzophenone-127, benzophenone-128, benzophenone-129, benzophenone-130, benzophenone-131, benzophenone-1

Photosynthesis inhibitors include, for example, ametryn, atrazine, bentazon, bromacil, bromoxynil, bromofenoxim, chlorbromuron, chloridazon, chlorotoluron, chloroxuron, cyanazine, and desmedipham. am), 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.

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

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

VLCFAs inhibitors include, for example, acetochlor, alachlor, anilofos, benfuresate, butachlor, butyrate, cafenstrole, dimepiperate, dimesulfazet, and dimethachlor. ethachlor), 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.

Hormonal action inhibitors and disruptors include, for example, 2,3,6-TBA, 2,4-D, 2,4-DB, 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.

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

Plant growth regulators (active plant growth regulator ingredients) include, for example, hymexazole, paclobutrazol, uniconazole-P, inabenfide, and prohexadione calcium.

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

Insecticides (insecticidal active ingredients) include, for example, 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, X MC, 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.

Acaricides (active acaricide ingredients) include, for example, hexythiazox, pyridaben, fenpyroximate, tebufenpyrad, chlorfenapyr, etoxazole, and pyrimidifen.

Examples of nematicides (nematicidal active ingredients) include fosthiazate.

The pesticidal 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.

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.

The pesticide 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 pesticidal 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.

The content of such pesticidal active ingredients may typically 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 ingredients can be set appropriately depending on the characteristics of the pesticidal active ingredients used.

(fiber)
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 include 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 observation with a microscope.

Common plant fibers (α-cellulose) are aggregates of countless microfibrils (ultra-fine fibers) and are classified into quasicrystalline and crystalline regions. The quasicrystalline region is an aggregate of amorphous cellulose chains and is flexible. On the other hand, in the crystalline region, the microfibrils are bonded in a certain direction, making it dense and rigid.
The microfibrils in this embodiment may contain both paracrystalline and crystalline regions, or may contain no paracrystalline regions and contain crystalline regions.

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 microfibrils can be measured by common methods such as microscopy. For commercially available fiber products, the values listed in the manufacturer's pamphlet can be used as the fiber length. The average fiber length of microfibrils can be determined based on the measured fiber length. Specifically, the average fiber length can be obtained by microscopy using a digital microscope, VHX-6000, manufactured by Keyence Corporation.

The microfibrils may contain or consist of microfibrils derived from wheat, beet, pulp, corn, soybeans, peas, oats, bamboo, sugarcane, potato, apple, psyllium, or rice. These microfibrils may 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 quasicrystalline and crystalline regions.

The microfibrils may comprise or consist of microcrystalline cellulose.
Microcrystalline cellulose is obtained by partially depolymerizing α-cellulose obtained from fibrous plants such as pulp with a mineral acid, isolating and purifying the cellulose crystalline region. Microcrystalline cellulose is obtained by hydrolyzing (depolymerizing) raw fiber and then separating and removing the amorphous portion, and is a crystalline fiber containing only fiber bundles. The microfibrils contained in the crystalline cellulose may contain crystalline regions but not paracrystalline regions. As a fibrous material containing this crystalline cellulose, commercially available product ARBOCEL (registered trademark) B800 (manufactured by Rettenmeyer Japan Co., Ltd.) described in the Examples section below can be used.
The microfibrils may contain or consist of both the microfibrils derived from wheat, beet, pulp, corn, soybean, pea, oat, bamboo, sugarcane, potato, apple, psyllium, or rice and the crystalline cellulose.

The fiber content is not particularly limited, but may be 70% or more insoluble dietary fiber. 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 fiber can be determined using a common 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 commercially available VITACEL (registered trademark) and ARBOCEL (registered trademark) products mentioned above each contain 70% or more insoluble dietary fiber.

The fiber content 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. By keeping the fiber content within the above range, the time required for the particles to disintegrate is shortened.

In addition to the fibers mentioned above, other insoluble fibers may also be included. Examples of other insoluble fibers include common ones such as agar, carrageenan, and cellulose. These other insoluble fibers can be blended in amounts appropriate to the present invention, as long as they do not impair the effects of the present invention.

(acetylene glycol surfactant)
An acetylene glycol surfactant can be added as a spreading agent.
The acetylene glycol surfactant may be, for example, an acetylene glycol compound represented by the following formula (1), that is, at least one of acetylene glycol and acetylene glycol derivatives.

[In formula (1), ^R1 and ^R4 are each an alkyl group or an allyl group having 1 to 20 carbon atoms and may be the same or different. ^R2 and ^R3 are each an alkyl group having 1 to 3 carbon atoms and may be the same or different. Furthermore, m and n are each a positive number of 0 or 30 or less.]

In the formula (1), as described above, ^R1 and ^R4 are each an alkyl group or an allyl group having 1 to 20 carbon atoms, and ^R2 and ^R3 are each an alkyl group having ¹ to 3 carbon atoms. R1 and ^R4 , and ^R2 and ^R3 may be the same or different from each other.
^R1 and ^R4 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. ^R1 and ^R4 are each independently preferably a butyl group, and more preferably an isobutyl group.
^R2 and ^R3 may each independently be a methyl group.

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.

In the above formula (1), ^R1 and ^R4 may each independently represent an alkyl group having 1 to 5 carbon atoms, ^R2 and ^R3 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. In the above formula (1), ^R1 and ^R4 may each independently represent a methyl group, ^R2 and ^R3 may each independently represent an isobutyl group, and the average number of moles of ethylene oxide units added (m+n) may be 0 to 30.

Specific examples of acetylene glycols in which the average number of moles of ethylene oxide units added in the acetylene glycol compound represented by formula (1) above 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, and 2,5-dimethyl-3-hexyne-2,5-diol. These acetylene glycol compounds can be used alone or in combination of two or more.

Furthermore, in the acetylene glycol compound represented by the above formula (1), examples of the acetylene glycol derivative, i.e., the ethoxylated acetylene glycol compound, include an ethoxylated 2,4,7,9-tetramethyl-5-decyne-4,7-diol (average total number of moles of ethylene oxide added: m+n, in the above formula (1), R ¹ and R ⁴ are isobutyl groups, and R ² and R ³ are methyl groups). Furthermore, 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 are ethoxylated 2,4,7,9-tetramethyl-5-decyne-4,7-diol (average total number of moles of ethylene oxide added: 1.3; in the above formula (1), ^R1 and ^R4 are isobutyl groups, ^R2 and ^R3 are methyl groups, m+n=1.3) and ethoxylated 2,4,7,9-tetramethyl-5-decyne-4,7-diol (average total number of moles of ethylene oxide added: 3.5; in the formula (1), ^R1 and ^R4 are isobutyl groups, ^R2 and ^R3 are methyl groups, m+n=3.5). These acetylene glycol compounds can be used alone or in combination of two or more.

The content of 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 agglomerating. The acetylene glycol surfactant content may also be 1 to 5% by weight or 2 to 5% by weight.

(Other ingredients)
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.

The water-floating pesticide composition may further contain a dispersant. The dispersant may be a dispersant other than the above-mentioned acetylene glycol surfactants.
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 lignin sulfonate sodium salt and alkylnaphthalene sulfonate formaldehyde condensate metal salt. In particular, it is preferable to use a polycarboxylic acid surfactant and lignin sulfonate 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.
The above-mentioned dispersants may be used alone or in combination of two or more.

The content of 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. By keeping the dispersant content within the above range, the particles can be dispersed as fine particles when they disintegrate.

The waterborne pesticide composition may further comprise a wetting agent.
The wetting agent is not particularly limited, and examples thereof include metal dioctyl sulfosuccinate, metal alkylbenzenesulfonate, metal alkylnaphthalenesulfonate, etc. Among these, metal dioctyl sulfosuccinate is preferred.

The content of wetting agent in the entire water-floating pesticide composition is not particularly limited, but is preferably 0 to 5% by weight, more preferably 0.1 to 4% by weight, and most preferably 0.2 to 3% by weight. When the content of wetting agent is within the above range, the active ingredient (pesticide active ingredient) contained in the water-floating pesticide composition is wetted, allowing the active ingredient to be quickly suspended in water after the granules disintegrate.

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

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

The water-borne pesticide composition may further comprise 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 shirasu, 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 animals and plants, cork, and wood flour. Among these, plastic microhollow bodies, foamed shirasu, 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.

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

The water-floating pesticide composition may further contain a bulking agent. The bulking agent may be the remainder of the entire water-floating pesticide composition other than the other components (the above-mentioned pesticidal active ingredient, fiber, acetylene glycol-based surfactant, dispersant, wetting agent, binder, buoyant carrier, etc.).
Examples of the bulking agent 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 (milk sugar), glucose, sucrose, etc.), vegetable 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 talcum 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 also be a combination of clay and bentonite. These bulking agents can be used alone or in combination of two or more. The above-mentioned floating carriers can also be used as the bulking agent.
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, but is preferably 1 to 15% by weight, more preferably 2 to 10% by weight, and most preferably 3 to 5% by weight. By keeping the white carbon content within the above numerical range, the disintegration time of the granules can be appropriately adjusted.

(Manufacturing method, usage pattern, 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, shaping by a method such as extrusion granulation, drying, sieving, and sieving.

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 the water-floating pesticide composition and a water-soluble film encapsulating the composition. As described above, inside the bag-shaped pesticide formulation, the particles of the water-floating pesticide composition are densely packed together, so they are prone to agglomeration 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, and examples thereof include films or sheets formed from polyvinyl alcohol or its derivatives, pullulan, salts of carboxymethylcellulose (such as the sodium salt), water-soluble cellulose derivatives, and polyethylene oxide or its derivatives. Among these, films or sheets formed from polyvinyl alcohol or its derivatives are preferred.

(How to use)
The water-floating pesticide composition of this embodiment can be applied by conventional methods such as manual application or mechanical application, similar to ordinary pesticide formulations, and can also be applied from a water inlet. The water-floating pesticide composition of this embodiment can also 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.

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

The above-mentioned spraying can be carried out by aircraft. There are no particular limitations on the aircraft, and examples include fixed-wing aircraft such as small light aircraft, rotary-wing aircraft such as manned and unmanned helicopters, tilt-rotor aircraft with both fixed and rotary wings, and agricultural multi-rotor aircraft (so-called drones) powered by motors and batteries. Of these aircraft, small unmanned helicopters and drones specialized for pesticide spraying are preferred.

The present invention will be explained in more detail below using examples, but the present invention is not limited to the contents described in the examples.

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

<Disintegration aid>
Fiber (1): VITACEL (registered trademark) WF600/30 (wheat-derived fiber, average fiber length: 30 μm, dietary fiber content: approximately 97%) (manufactured by Rettenmeyer Japan Co., Ltd.)
Fiber (2): VITACEL (registered trademark) WF600 (wheat-derived fiber, average fiber length: 80 μm, dietary fiber content: approximately 97%) (manufactured by Rettenmeyer Japan Co., Ltd.)
Fiber (3): VITACEL (registered trademark) WF200 (wheat-derived fiber, average fiber length: 250 μm, dietary fiber content: approximately 97%) (manufactured by Rettenmeyer Japan Co., Ltd.)
Fiber (4): VITACEL® HF600/30 (oat-derived fiber, average fiber length: 30 μm, dietary fiber content: approximately 96%) (manufactured by Rettenmeyer Japan Co., Ltd.)
Fiber (5): VITACEL® HF600 (oat-derived fiber, average fiber length: 80 μm, dietary fiber content: approximately 96%) (manufactured by Rettenmeyer Japan Co., Ltd.)
Fiber (6): VITACEL® HF200 (oat-derived fiber, average fiber length: 250 μm, dietary fiber content: approximately 96%) (manufactured by Rettenmeyer 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: Cellogen (registered trademark) 6A (etherification degree: 0.70 to 0.80) (manufactured by Dai-ichi Kogyo Seiyaku Co., Ltd.)

<Extender>
Acetylene glycol surfactant (1): Surfynol (registered trademark) 440 (in the above formula (1), ^R1 and ^R4 are isobutyl groups, ^R2 and ^R3 are methyl groups, and m+n=3.5) (manufactured by Evonik)
Acetylene glycol surfactant (2): Surfynol (registered trademark) 104PG50 (in the above formula (1), ^R1 and ^R4 are isobutyl groups, ^R2 and ^R3 are methyl groups, and m+n=0. The product contains 50% by weight of propylene glycol) (manufactured by Evonik).
Acetylene glycol surfactant (3): Olfine (registered trademark) E1004 (in the above formula (1), ^R1 and ^R4 are isobutyl groups, ^R2 and ^R3 are methyl groups, and m+n=4) (manufactured by Nissin Chemical Industry Co., Ltd.)
Acetylene glycol surfactant (4): Surfynol (registered trademark) 465 (in the above formula (1), ^R1 and ^R4 are isobutyl groups, ^R2 and ^R3 are methyl groups, and m+n=10) (manufactured by Evonik)
Acetylene glycol surfactant (5): Surfynol (registered trademark) 485 (in the above formula (1), ^R1 and ^R4 are isobutyl groups, ^R2 and ^R3 are methyl groups, and m+n=30) (manufactured by Evonik)
Polyoxyethylene (POE) alkanediol: New Calgen TG-310 (manufactured by Takemoto Oil Co., Ltd.)

<Dispersant>
Lignosulfonic acid sodium salt: New Calgen WG-4 (manufactured by Takemoto Oil & Fat Co., Ltd.)
Polycarboxylic acid surfactant: Toxanon GR-31A (water content: 57%) (manufactured by Sanyo Chemical Industries, Ltd.)
<Wetting agent>
Dioctyl sulfosuccinate metal salt: New Calgen EP-70G (water content: approximately 15%) (manufactured by Takemoto Oil & Fat Co., Ltd.)
<Binder>
Dextrin: Pine index #1 (Matsutani Chemical Industry Co., Ltd.)
<Floating carrier>
Acrylonitrile hollow body: Matsumoto Microsphere (registered trademark) MFL-81GCA (manufactured by Matsumoto Yushi Pharmaceutical Co., Ltd.)
<Bulking agent>
Bentonite: Kunigel (registered trademark) V1 (manufactured by Kunimine Industries Co., Ltd.)
Clay: NK-300 (Showa KDE Co., Ltd.)
White carbon: Carplex (registered trademark) #80 (manufactured by Evonik Japan Co., Ltd.)

[Examples 1 to 28 and Comparative Examples 1 to 18]
(Preparation of water-floating pesticide composition)
The raw materials were mixed in the blending ratios shown in Tables 1 to 5 below, and a predetermined amount of water was added and further kneaded. Thereafter, the mixture was 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 each of 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 of each component are as follows.
The values for ingredients A to O represent the weight parts of the ingredients themselves, calculated taking purity into consideration.
The values for the polycarboxylic acid surfactant and dioctyl metal sulfosuccinate are parts by weight of the total (total of solids and water), and the values for other components represent parts by weight of the solids. The parts by weight of the solids for the polycarboxylic acid surfactant and dioctyl metal sulfosuccinate can be calculated based on the parts by weight of the total and the above-mentioned water content.
*The total value means the sum of the parts by weight of the solid content of each component.

(Evaluation of Water-Floating Pesticide Composition)
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.

<Diffusibility>
Test method: A container (70 cm long x 115 cm wide x 20 cm high) was filled with water adjusted to 20°C to a depth of 5 cm, and a hollow tube (6 cm diameter (inner diameter), 15 cm high, 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 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, poor (Δ): 90 seconds or more but less than 180 seconds, extremely poor (×): 180 seconds or more.
The shorter the measurement time in the evaluation of the above-mentioned diffusibility, the easier it is for the particles to diffuse without agglomerating 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.

<Disintegrability of granules>
Test method: 5 L of water adjusted to 20°C was added to a container (42 cm length x 31.5 cm width x 11 cm height) and allowed to stand. Then, 1 g of each water-floating pesticide composition was added to the center of the container. The added 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 added was taken as the measurement start time, and the time required for 90% of the particles of the added water-floating pesticide composition (many 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 easier it is for the individual particles to disintegrate. When the measurement time in the evaluation of particle disintegrability is 15 minutes or less, the particle disintegrability can be said to be good.

 

 

 

 

Examples 1 to 28 relate to water-floating pesticide compositions containing a pesticidal active ingredient, a fiber (an aggregate of microfibrils made of cellulose, the average fiber length of the microfibrils being 10 to 1000 μm), and an acetylene glycol-based surfactant.
On the other hand, 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 that contain a POE alkanediol instead of the acetylene glycol surfactant. Comparative Examples 10 and 16 relate to water-floating pesticide compositions that contain sodium carboxymethylcellulose instead of the fibrous material and a POE alkanediol instead of the acetylene glycol surfactant. Comparative Examples 11 and 17 relate to water-floating pesticide compositions that do not contain the fibrous material and a POE alkanediol instead of the acetylene glycol surfactant. Comparative Examples 12 and 18 relate to water-floating pesticide compositions that do not contain either the fibrous material or the acetylene glycol surfactant.

From the results in Tables 1 and 2, it was found that the water-floating pesticide compositions of Examples 1 to 14 were easily dispersed, as the measurement time for the evaluation of diffusibility was short and favorable. Furthermore, it was found that the water-floating pesticide compositions of Examples 1 to 14 were easily dispersed, as the measurement time for the evaluation of particle disintegration was short, as individual particles were easily disintegrated.
Furthermore, the results of Examples 1 to 7 show that even if the type of fiber is changed, the diffusibility and disintegration properties of the particles remain good and do not change.
Furthermore, the results of Examples 6 and 8 to 11 showed that the use of any of the acetylene glycol-based surfactants (1) to (5) resulted in good diffusibility and particle disintegration. Among them, the ranking of the surfactants with the best 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.

On the other hand, the results in Table 3 show 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. Furthermore, 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, and were difficult to disperse, and the measurement time in the evaluation of particle disintegration was long, and individual particles were difficult to disintegrate. Furthermore, 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.

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 was short and favorable. Also, the water-floating pesticide compositions of Examples 15 to 28 were easily dispersed, as the measurement time for the evaluation of particle disintegration was short.
Furthermore, the results of Examples 15 to 28 showed that even if the type of pesticide active ingredient was changed, the diffusibility and granule disintegration properties remained good and did not change.
Furthermore, a comparison of Examples 1 to 14 (especially Example 6) in Tables 1 and 2 with Example 15 in Table 4 revealed that even if the amount of floating carrier added and the type and amount of bulking agent added were changed, the diffusibility and particle disintegration properties remained good and did not change.

On the other hand, the results in Table 5 show that the water-floating pesticide compositions of Comparative Examples 13 and 16 had a short measurement time in the evaluation of particle disintegration, meaning that individual particles were easily disintegrated, but the measurement time in the evaluation of diffusibility was extremely long, at 180 seconds or more, meaning that they were extremely difficult to disperse. The water-floating pesticide composition of Comparative Example 14 had a short and favorable measurement time in the evaluation of diffusibility, but the measurement time in the evaluation of particle disintegration was long, meaning that 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, meaning that they were difficult to disperse, and the measurement time in the evaluation of particle disintegration was long, meaning that individual particles were not easily disintegrated. Additionally, the water-floating pesticide composition of Comparative Example 18 had an extremely long measurement time in the evaluation of diffusibility, at 180 seconds or more, meaning that they were extremely difficult to disperse, and the measurement time in the evaluation of particle disintegration was long, meaning that individual particles were not easily disintegrated.

From the above, it was found that the water-floating pesticide composition of the present invention has excellent diffusibility and particle disintegration properties.

Claims (13)

pesticide active ingredients,
A water-floating pesticide composition comprising: a 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 1000 μm. The water-floating pesticide composition according to claim 1, wherein the microfibrils comprise microfibrils derived from wheat, beets, pulp, corn, soybeans, peas, oats, bamboo, sugarcane, potatoes, apples, psyllium, or rice. The water-floating pesticide composition according to claim 1 or 2, wherein the microfibrils contain crystalline cellulose. 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. The water-floating pesticide composition according to any one of claims 1 to 4, wherein the content of the fiber in the entire water-floating pesticide composition is 1 to 15% by weight. 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),
^R1 and ^R4 each represent an alkyl group or an aryl group having 1 to 20 carbon atoms, and may be the same or different from each other;
^R2 and ^R3 are each an alkyl group having 1 to 3 carbon atoms and may be the same or different from each other;
m and n are each a positive number of 0 or 30 or less. 7. The water-floating pesticide composition according to claim 6, wherein, in formula (1), R ¹ and R ⁴ are each independently an alkyl group having 1 to 5 carbon atoms, 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. The water-floating pesticide composition according to claim 7, wherein, in formula (1), R ¹ and R ⁴ are methyl groups, R ² and R ³ are isobutyl groups, and the average number of moles of ethylene oxide units added (m+n) is 0 to 30 moles. 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 greater than 0% by weight and not more than 5% by weight. The water-floating pesticide composition according to any one of claims 1 to 9, which is encapsulated in a water-soluble film. The water-floating pesticide composition according to claim 10, wherein the water-soluble film contains polyvinyl alcohol. The water-floating pesticide composition according to any one of claims 1 to 11, which is in the form of a granule. The water-floating pesticide composition according to any one of claims 1 to 12, further comprising white carbon.