Classifications

• • A—HUMAN NECESSITIES
  • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
  • A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
  • A01N25/00—Biocides, pest repellants or attractants, or plant growth regulators, characterised by their forms, or by their non-active ingredients or by their methods of application, e.g. seed treatment or sequential application; Substances for reducing the noxious effect of the active ingredients to organisms other than pests
  • A01N25/12—Powders or granules
  • A01N25/14—Powders or granules wettable
• • A—HUMAN NECESSITIES
  • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
  • A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
  • A01N25/00—Biocides, pest repellants or attractants, or plant growth regulators, characterised by their forms, or by their non-active ingredients or by their methods of application, e.g. seed treatment or sequential application; Substances for reducing the noxious effect of the active ingredients to organisms other than pests
  • A01N25/12—Powders or granules
• • A—HUMAN NECESSITIES
  • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
  • A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
  • A01N25/00—Biocides, pest repellants or attractants, or plant growth regulators, characterised by their forms, or by their non-active ingredients or by their methods of application, e.g. seed treatment or sequential application; Substances for reducing the noxious effect of the active ingredients to organisms other than pests
  • A01N25/30—Biocides, pest repellants or attractants, or plant growth regulators, characterised by their forms, or by their non-active ingredients or by their methods of application, e.g. seed treatment or sequential application; Substances for reducing the noxious effect of the active ingredients to organisms other than pests characterised by the surfactants
• • A—HUMAN NECESSITIES
  • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
  • A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
  • A01N43/00—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds
  • A01N43/48—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with two nitrogen atoms as the only ring hetero atoms
  • A01N43/54—1,3-Diazines; Hydrogenated 1,3-diazines

Definitions

• the invention relates to a granular agrochemical composition capable of alleviating or preventing chemical damages and decreasing environmental load along with capability of exhibiting efficacy over a long duration.
• the invention has an object to overcome the problems of conventional granular agrochemical compositions and to provide a granular agrochemical composition which can be prepared in a simple formulation, capable of showing the efficacy of the agrochemically active ingredients over a long time, decreasing the environmental load, and alleviating or preventing chemical damages caused by the agrochemically active ingredients.
• the inventors have conducted extensive investigations on a granular agrochemical composition, as a result, to find that the above-mentioned problems can be solved by obtaining a composition by compounding an acidic agrochemically active ingredient with a cationic surfactant and a basic substance and have accomplished the invention based on this finding.
• compositions including:
• an acidic agrochemically active ingredient to be used for the granular agrochemical composition of the invention is not particularly limited, however, it is generally a herbicide, a plant growth regulator, a fungicide, or an insecticide and specially, those having a pKa in the range of 2 to 7 are preferable and geometrical isomers and optical isomers are also included.
• the herbicide is not particularly limited and those having a pKa in the range of 2 to 7 are preferable and especially, those comprising mainly sulfonylurea-based compounds, or difluoromethanesulfonylanilide derivatives expressed by the general formula (I): (wherein R 1 is a hydrogen atom, alkyl group or alkoxyalkyl group); or salts thereof are further preferable.
• sulfonylurea-based compound examples include 1-(4,6-dimethoxypyrimidin-2-yl)-3-[1-methyl-4-(2-methyl-2H-tetrazol-5-yl)pyrazol-5-ylsulfonyl]urea (Azimsulfuron), 1-(2-chloroimidazo[1,2-a]pyridin-3-ylsulfonyl)-3-(4,6-dimethoxypyrimidin-2-yl)urea (imazosulfuron), ethyl 5-(4,6-dimethoxypyrimidin-2-ylcarbamoylsulfamoyl)-1-methylpyrazole-4-carboxylate (pyrazosulfuron-ethyl), methyl ⁇ -(4,6-dimethoxypyrimidin-2-ylcarbamoylsulfamoyl)-o-toluate (bensulfuron-methyl), 1-(4,6-dimethoxypyr
• difluoromethanesulfonylanilide derivatives and salts thereof include compounds described in Japanese Patent Application Laid-Open No. 2000-44546, such as 2-[(4,6-dimethoxypyrimidin-2-yl)hydroxymethyl]-N-difluoromethanesulfonylanilide, 2-[(4,6-dimethoxypyrimidin-2-yl)hydroxymethyl]-6-methoxymethyl-N-difuloromethanesulfonylanilide and 2-[(4,6-dimethoxypyrimidin-2-yl)hydroxymethyl]-6-ethyl -N-difuloromethanesulfonylanilide.
• herbicides examples include S-ethyl 2-methyl-4-chlrophenoxythioacetate (phenothiol), ⁇ -2-naphthoxypropionanilide (naproanilide), methyl 5-(2,4-dichlorophenoxy)-2-nitrobenzoate (bifenox), S-(4-chlorobenzyl)-N,N-diethylthiocarbamate (benthiocarb), S-benzyl 1,2-dimethylpropyl(ethyl)thiocarbamate (esprocarb), S-ethyl hexahydro-1H-azepine-1-carbothioate (molinate), S-1-methyl-1-phenylethyl piperidine-1-carbothioate (dimepiperate), 0-3-tert-butylphenyl 6-methoxy-2-pyridyl(methyl)thiocarbamate (pyributicarb), 2-chloro-2′,6′-
• the plant growth regulator is not particularly limited and examples thereof include 4′-chloro-2′-( ⁇ -hydroxybenzyl)isonicotinanilide (inabenfide), (2RS,3RS)-1-(4-chlorophenyl)-4,4-dimethyl-2-(1H-1,2,4-triazol-1-yl)-pentan-3-ol (paclobutrazol), (E)-(S)-1-(4-chlorophenyl)-4,4-dimethyl-2-(1H-1,2,4-triazol-1-yl)pent-1-en-3-ol (uniconazole), calcium 3-oxido-5-oxo-4-propionylcyclohexa-3-enecarboxylate (prohexadione-calcium) and choline salt of maleic hydrazide.
• those having a pKa in the range of 2 to 7 are preferably used.
• the fungicide is not particularly limited and examples thereof include O,O-diisopropyl s-benzyl thiophosphate (iprobenfos), 3′-isopropoxy-2-methylbenzanilide (mepronil), ⁇ , ⁇ , ⁇ -trifluoro-3′-isopropoxy-O-toluanilide (fultolanil), 3,4,5,6-tetrachloro-N-(2,3-dichlorophenyl)-phthalamic acid (tecloftalam), 1-(4-chlorobenzyl)-1-cyclopentyl-3-phenylurea (pencycuron), 6-(3,5-dichloro-4-methylphenyl)-3(2H)-pyridazinone (diclomezine), methyl N-(2-methoxyacetyl)-N-(2,6-xylyl)-DL-alaninate (metalaxyl), (E)-4-chloro- ⁇ , ⁇ , ⁇
• the insecticide is not particularly limited and examples thereof include O,O-dimethyl O-(3-methyl-4-nitrophenyl)thiophosphate (MEP), (2-isopropyl-4-methylpyrimidin-6-yl)-diethylthiophosphate (diazinon), 1-naphthyl N-methylcarbamate (carbaryl), O,O-diethyl O-(3-oxo-2-phenyl-2H-pyridazin-6-yl) phosphorothioate (pyridaphenthion), O,O-dimethyl 0-3,5,6-trichloro-2-pyridyl phosphorothioate (chlorpyrifos-methyl), dimethyl dicarbethoxyethyl dithiophosphate (malathion), O,O-dimethyl S-(N-methylcarbamoylmethyl) dithiophosphate (dimethoate), O,O-dipropyl O-4-methylthiophen
• the pKa of the ingredient can be measured by, for example, a method described in “Jikken Kagaku Koza 5, (Thermal measurement and Equilibrium)”, Maruzene, p. 469-474, Jan. 20 (1958) and the like.
• the cationic surfactant to be used in the invention is not particularly limited and can be exemplified preferably by those of amine salt type, pyridinium salt type and quaternary ammonium salt type.
• amine salt type cationic surfactants examples include laurylamine hydrochloride, stearylamine hydrochloride, oleylamine acetate, stearylamine acetate and stearylaminopropylamine acetate.
• pyridinium salt type cationic surfactants examples include laurylpyridinium chloride, myristylpyridinium chloride and cetylpyridinium chloride.
• Examples of the quaternary ammonium salt type cationic surfactants include alkyldimethylbenzylammonium chloride, lauryltrimethylammonium chloride, cetyltrimethylammonium chloride, stearyltrimethylammonium chloride, dilauryldimethylammonium chloride, dioleyldimethylammonium chloride, dicocoyldimethylammonium chloride, distearyldimethylammonium chloride, lauryldi(hydroxyethyl)methylammonium chloride, oleylbis(polyoxyethylene)methylammonium chloride, stearylhydroxyethyldimethylammonium chloride, lauryldimethylbenzylammonium chloride, lauroylaminopropyldimethylethylammonium ethosulfate, and lauroylaminopropyldimethylhydroxyethylammonium perchlorate.
• cationic surfactant are compounds which are gelled or exhibit swellability in water such as dialkyldimethylammonium chloride, the alkyl part of which is C 8 to C 22 , particularly, dilauryldimethylammonium chloride, dioleyldimethylammonium chloride, dicocoyldimethylammonium chloride and distearyldimethylammonium chloride.
• dialkyldimethylammonium chloride the alkyl part of which is C 8 to C 22
• dilauryldimethylammonium chloride dioleyldimethylammonium chloride
• dicocoyldimethylammonium chloride distearyldimethylammonium chloride.
• the basic substance to be used in the invention is not particularly limited, however preferable are those having a pH 7.5 or higher or, more preferably 9 to 12, in the case that they are in the form of 1% by mass aqueous solution or 1% by mass aqueous suspension.
• the basic substances include hydroxides of alkali metals and alkaline earth metals, alkali metal salts, alkaline earth metal salts, and chemical substances and minerals containing them and more particular examples include sodium hydroxide, potassium hydroxide, sodium hydrogen carbonate, sodium carbonate, calcium hydroxide, calcium carbonate, calcium oxide, basic fumed silica and basic acid clay. These basic substances may be used either singly or in combination of two kinds or more.
• the granular agrochemical composition of the invention may contain additive components used usually in agrochemical preparations, based on the necessity.
• additive components an extender or an auxiliary component may be used.
• a solid carrier such as a mineral carrier and a water-soluble salt may be used and particular examples thereof include clays, calcium carbonate, bentonite, talc, diatomaceous earth, acid clay, silica sand, granulated calcium carbonate, calcium stearate, fumed silica, potassium chloride, sodium sulfate anhydride, potassium sulfate, urea, ammonium sulfate and the like. These may be used either singly or in combination of two kinds or more.
• a binder for preparing the granular composition may be included and particular examples include carboxymethyl cellulose sodium salt, dextrin, water-soluble starch, xanthan gum, guar gum, sucrose, poly(vinylpyrrolidone), poly(vinyl alcohol), poly(sodium acrylate), polyethylene glycol having an average molecular weight of 6,000 to 20,000 and polyethylene oxide having an average molecular weight of 100,000 to 5,000,000.
• organic solvent to be used at the time of dissolving the acidic agrochemically active ingredient and the cationic surfactant and adsorption thereof on a carrier include alkylnaphthalenes, dimethylformamide, dimethyl sulfoxide, N-methyl-2-pyrrolidone, N-octylpyrrolidone and various polyhydric alcohols.
• stabilizers, inorganic hollow granules, plastic hollow granules and plant segments may be used. These may be used either singly or as a combination of two kinds or more.
• composition ratios of the respective components of the agrochemical granular composition of the invention are selected in the ranges, usually, as an acidic agrochemically active ingredient 0.01 to 50% by mass, a cationic surfactant 0.1 to 20% by mass and a basic substance 0.1 to 95% by mass and when the total amount of the foregoing three components does not reach 100%, the balance is an optional additive component.
• composition ratios of the respective components are selected so that a pH of a 1% by mass aqueous suspension of the granular agrochemical composition is adjusted to 5 or higher, preferably, 7 or higher or, further preferably, 7.5 to 11.5 and especially that a pH of a 1% by mass aqueous suspension of the granular agrochemical composition indicates a value higher than the pKa of the agrochemically active ingredient or, particularly, in the range larger than the pKa value by 2 to 6.
• the contents in the total amount of the composition are generally selected in the ranges of 5 to 95% by mass for the extender and 0.1 to 30% by mass for the auxiliary agents.
• the granular agrochemical composition of the invention is preferably to be a granular material having a particle diameter of 0.01 to 5 mm or, more preferably, 0.1 to 3 mm or having a diameter of 0.1 to 10 mm or, more preferably, 0.5 to 7 mm and a length of 0.3 to 30 mm or, more preferably, 1.5 to 20 mm.
• the granular agrochemical composition of the invention may be a type (a disintegration type) that granules are disintegrated and lose the master blend of granules by division or dispersion or may be a type (a non-disintegration type) that the granules are not disintegrated and keep granular master blend of granules, after treatment in a field, the non-disintegration type is preferable and especially the non-disintegration type which keep the master blend of granules, in which disintegration of the granules are not found or scarcely found even after 15 to 30 minutes from addition in water, is preferable.
• non-disintegration type granular agrochemical composition of the invention can be added to disintegration type floating-in-water granules dispersing on water surface to obtain a saved agrochemical preparation having sustained releasability of dissolution of the agrochemically active ingredients.
• the invention also includes a mixed granular agrochemical composition which is a blend of the above-mentioned granular agrochemical composition and agrochemical granules without containing either one or both of the cationic surfactant and the basic substance in a mass proportion of from 1:9 to 9:1.
• a method for the preparation of the granular agrochemical composition of the invention is not particularly limited although, usually, the following methods may be employed:
• a method including steps of adding a suitable amount of water to a mixture of all of base materials, kneading the mixture, successively carrying out granulation by extruding the mixture through a screen having an opening of a specified size, and drying the granules;
• a method including steps of either dissolving an acidic agrochemically active ingredient and a cationic surfactant in an organic solvent and subjecting the mixture to be adsorbed on a basic carrier, or dissolving an acidic agrochemically active ingredient and a cationic surfactant in an organic solvent, subjecting the mixture adsorbed on a carrier and then subjecting same to be coated or adsorbed with a basic substance and, according to need, an agrochemically active ingredient having no sustained releasability; and
• a method including steps of mixing the granular agrochemical composition having sustained releasability obtained by the above-mentioned methods, an agrochemically active ingredient having no sustained releasability and auxiliary agents, kneading the mixture after addition of a suitable amount of water, carrying out granulation by extruding the mixture through a screen having mesh opening diameter larger than the particle diameter of the granules of the agrochemical composition having sustained releasability and drying the granules.
• Each of the basic substances in Examples was used as a 1% by mass aqueous solution or 1% by mass aqueous suspension having a pH of 7.5 or higher.
• Each of the cationic surfactants used in Examples 1, 3, 5 to 8, 10 and 12 to 25 caused gelation in water.
• a 0.5 part portion of bensulfuron-methyl (pKa 5.03) and 5 parts of calcium carbonate were uniformly blended and crushed with a hammer mill. Together with the powder thus obtained, 2 parts of distearyldimethylammonium chloride, 3 parts of ⁇ starch and 89.5 parts of clay were uniformly blended in a high speed agitator and kneaded with addition of a suitable amount of water followed by extrusion by using a basket-type granulator through a screen of 1.2 mm mesh opening and the granulated material was dried by standing at 60° C.
• a granular agrochemical composition having a diameter of 1.1 to 1.3 mm and a length of 3 to 7 mm and containing 0.5% by mass of bensulfuron-methyl (pH of a 1% by mass aqueous suspension 8.28).
• the granular agrochemical composition thus obtained was put into water and observed after 30 minutes for the disintegrability of the granules to obtain a result that it was of a non-disintegration type.
• a 0.5 part portion of pyrazosulfuron-ethyl (pKa 3.91), 10 parts of clay and 0.2 part of sodium hydroxide were uniformly blended and crushed with a hammer mill. Together with the powder thus obtained, 2 parts of laurylamine hydrochloride, 5 parts of polyvinyl alcohol, 10.0 parts of sodium bentonite and 72.3 parts of clay were uniformly blended in a high speed agitator and kneaded with addition of a suitable amount of water followed by extrusion by using a basket-type granulator through a screen of 1.2 mm mesh opening and the granulated material was dried by standing at 60° C.
• a granular agrochemical composition having a diameter of 1.1 to 1.3 mm and a length of 3 to 7 mm and containing 0.5% by mass of pyrazosulfuron-ethyl (pH of a 1% by mass aqueous suspension 10.51).
• the granular agrochemical composition thus obtained was put into water and observed after 30 minutes for the disintegrability of the granules to obtain a result that it was of a non-disintegration type.
• a granular agrochemical composition having a diameter of 1.1 to 1.3 mm and a length of 3 to 7 mm and containing 0.5% by mass of Compound A (pH of a 1% by mass aqueous suspension 9.08).
• the granular agrochemical composition thus obtained was put into water and observed after 30 minutes for the disintegrability of the granules to obtain a result that it was of a non-disintegration type.
• a 0.3 part portion of bensulfuron-methyl (pKa 5.03), 0.06 part of azimsulfuron (pKa 3.60), 5 parts of stearyltrimethylammonium chloride, 5 parts of basic fumed silica, 2 parts of sodium polyacrylate and 87.64 parts of clay were uniformly blended in a high speed agitator and kneaded with addition of a suitable amount of water followed by extrusion by using a basket-type granulator through a screen of 1.2 mm mesh opening and the granulated material was dried by standing at 60° C.
• a granular agrochemical composition having a diameter of 1.1 to 1.3 mm and a length of 3 to 7 mm and containing 0.3% by mass of bensulfuron-methyl and 0.06% by mass of azimsulfuron (pH of a 1% by mass aqueous suspension 10.28).
• the granular agrochemical composition thus obtained was put into water and observed after 30 minutes for the disintegrability of the granules to obtain a result that it was of a non-disintegration type.
• a 0.5 part portion of Compound A (pKa 5.75), 3 parts of ⁇ starch and 96.5 parts of calcium carbonate were uniformly blended in a high speed agitator and kneaded with addition of a suitable amount of water followed by extrusion by using a basket-type granulator through a screen of 1.2 mm mesh opening and the granulated material was dried by standing at 60° C. to obtain a granular agrochemical composition containing 0.5% by mass of Compound A.
• a 20 parts portion of the granular agrochemical composition and 80 parts of the granular agrochemical composition containing 0.5% by mass of Compound A in Example 3 were blended by a blender to obtain a mixed granular agrochemical composition having a diameter of 1.1 to 1.3 mm and a length of 3 to 7 mm and containing 0.5% by mass of Compound A (pH of a 1% by mass aqueous suspension 8.44).
• the granular agrochemical composition thus obtained was put into water and observed after 30 minutes for the disintegrability of the granules to obtain a result that it was of a non-disintegration type.
• a 0.5 part portion of Compound A (pKa 5.75), 3 parts of ⁇ starch and 96.5 parts of calcium carbonate were uniformly blended in a high speed agitator and kneaded with addition of a suitable amount of water followed by extrusion by using a basket-type granulator through a screen of 1.2 mm mesh opening and the granulated material was dried by standing at 60° C. to obtain a granular agrochemical composition containing 0.5% by mass of Compound A.
• a 50 parts portion of the granular agrochemical composition and 50 parts of the granular agrochemical composition containing 0.5% by mass of Compound A in Example 3 were blended by a blender to obtain a mixed granular agrochemical composition having a diameter of 1.1 to 1.3 mm and a length of 3 to 7 mm and containing 0.5% by mass of Compound A (pH of a 1% by mass aqueous suspension 8.90).
• the granular agrochemical composition thus obtained was put into water and observed after 30 minutes for the disintegrability of the granules to obtain a result that it was of a non-disintegration type.
• a 0.5 part portion of Compound A (pKa 5.75), 3 parts of ⁇ starch and 96.5 parts of calcium carbonate were uniformly blended in a high speed agitator and kneaded with addition of a suitable amount of water followed by extrusion by using a basket-type granulator through a screen of 1.2 mm mesh opening and the granulated material was dried by standing at 60° C. to obtain a granular agrochemical composition containing 0.5% by mass of Compound A.
• a 80 parts portion of the granular agrochemical composition and 20 parts of the granular agrochemical composition containing 0.5% by mass of Compound A in Example 3 were blended by a blender to obtain a mixed granular agrochemical composition having a diameter of 1.1 to 1.3 mm and a length of 3 to 7 mm and containing 0.5% by mass of Compound A (pH of a 1% by mass aqueous suspension 9.06).
• the granular agrochemical composition thus obtained was put into water and observed after 30 minutes for the disintegrability of the granules to obtain a result that it was of a non-disintegration type.
• Compound B pKa 6.17
• a granular agrochemical composition having a diameter of 1.1 to 1.3 mm and a length of 3 to 7 mm and containing 0.5% by mass of Compound B (pH of a 1% by mass aqueous suspension 10.41).
• the granular agrochemical composition thus obtained was put into water and observed after 30 minutes for the disintegrability of the granules to obtain a result that it was of a non-disintegration type.
• the bensulfuron-methyl solution prepared as above was added on 81.5 parts of basic acid clay, which had a particle size of 16 to 35 mesh (1000 to 425 ⁇ m) and gave a 1% by mass aqueous suspension having a pH of 7 to 10, to be adsorbed thereon for granulation to give granules of the agrochemical composition having a particle diameter of 0.4 to 1.1 mm and containing 0.5% by mass of bensulfuron-methyl (pH of a 1% by mass aqueous suspension 7.69).
• the granulated agrochemical composition thus obtained was put into water and observed after 30 minutes for the disintegrability of the granules to obtain a result that it was of a non-disintegration type.
• a 3 parts portion of polyvinyl alcohol and 85.5 parts of calcium carbonate were uniformly blended in a high speed agitator and kneaded with addition of a suitable amount of water followed by extrusion by using a basket-type granulator through a screen of 1.2 mm mesh opening and the granulated material was dried by standing at 60° C. to obtain a base.
• 2 parts of fentrazamide and 2 parts of basic fumed silica were uniformly blended and crushed with a hammer mill to obtain fentrazamide-containing powder.
• a 0.5 part portion of Compound A (pKa 5.75), 2.0 parts of dilauryldimethylammonium chloride and 5 parts of tributyl phosphate were blended to obtain a Compound A solution.
• the base prepared as above was added to the Compound A solution to be adsorbed thereon for granulation and coated with the fentrazamide-containing powder to give granules of the agrochemical composition having a particle diameter of 1.1 to 1.3 mm and a length of 3 to 7 mm and containing 2% by mass of fentrazamide (pH of a 1% by mass aqueous suspension 9.45).
• the granular agrochemical composition thus obtained was put into water and observed after 30 minutes for the disintegrability of the granules to obtain a result that it was of a non-disintegration type.
• a 2.5 parts portion of pentoxazone and 2 parts of calcium carbonate were uniformly blended and crushed with a hammer mill to obtain pentoxazone-containing powder.
• a 0.5 part portion of imazosulfuron (pKa 4.00), 5 parts of cetyltrimethylammonium chloride, 5 parts of dimethyl sulfoxide and 10 parts of dimethyl naphthalene were blended to obtain an imazosulfuron solution.
• the imazosulfuron solution prepared as above was added to 75 parts of granulated bentonite, which had a particle size of 12 to 42 mesh (1400 to 355 ⁇ m) and gave a 1% by mass aqueous suspension having a pH of 9 to 10, to be adsorbed thereon for granulation and, then, coated with pentoxazone-containing powder to give granules of the agrochemical composition having a particle diameter of 0.3 to 1.5 mm and containing 0.5% by mass of imazosulfuron and 2.5% by mass of pentoxazone (pH of a 1% by mass aqueous suspension 7.96).
• the granular agrochemical composition thus obtained was put into water and observed after 30 minutes for the disintegrability of the granules to obtain a result that it was of a non-disintegration type.
• a 2 parts portion of bensulfuron-methyl (pKa 5.03), 4 parts of distearyldimethylammonium chloride, 3 parts of polyvinyl alcohol, 2 parts of basic fumed silica and 15 parts of calcium carbonate were uniformly blended in a high speed agitator and kneaded with addition of a suitable amount of water followed by extrusion by using a basket-type granulator through a screen of 0.6 mm mesh opening and the granulated material was dried by standing at 60° C. to obtain a bensulfuron-methyl containing base having a diameter of 0.5 to 0.7 mm and a length of 1 to 6 mm.
• a granular agrochemical composition having a diameter of 3 to 7 mm and a length of 3 to 20 mm and containing 0.5% by mass of bensulfuron-methyl (pH of a 1% by mass aqueous suspension 8.85).
• the granular agrochemical composition thus obtained was put into water and observed after 30 minutes for the disintegrability of the granules to obtain results that the granular agrochemical composition having a diameter of 3 to 7 mm and a length of 3 to 20 mm disintegrated immediately after being put into water while the bensulfuron-methyl containing base having a diameter of 0.5 to 0.7 mm and a length of 1 to 6 mm and containing distearyldimethylammonium chloride, which is a cationic surface active agent, was of a non-disintegration type.
• Compound B (pKa 6.17), 3 parts of dioleyldimethylammonium chloride and 5 parts of N-methyl-2-pyrrolidone were blended to obtain a Compound B solution.
• the Compound B solution prepared as above was added to 20 parts of basic acid clay, which had a particle size of 16 to 35 mesh (1000 to 425 ⁇ m) and gave a 1% aqueous suspension having a pH of 7 to 10, to be adsorbed thereon for granulation to give a Compound B containing base having a particle diameter of 0.4 to 1.1 mm.
• a granular agrochemical composition having a diameter of 3 to 7 mm and a length of 3 to 20 mm and containing 2% by mass of Compound B (pH of a 1% by mass aqueous suspension 8.34).
• the granular agrochemical composition thus obtained was put into water and observed after 30 minutes for the disintegrability of the granules to obtain results that the granular agrochemical composition having a diameter of 3 to 7 mm and a length of 3 to 20 mm disintegrated immediately after being put into water while the Compound B containing base having a particle diameter of 0.4 to 1.1 mm and containing dioleyldimethylammonium chloride, which is a cationic surface active agent, was of a non-disintegration type.
• a 0.5 part portion of Compound A (pKa 5.75), 1 part of distearyldimethylammonium chloride, 3 parts of ⁇ starch and 95.5 parts of calcium carbonate were uniformly blended in a high speed agitator and kneaded with addition of a suitable amount of water followed by extrusion by using a basket-type granulator through a screen of 1.2 mm mesh opening and the granulated material was dried by standing at 60° C. to obtain a granular agrochemical composition having a diameter of 1.1 to 1.3 mm and a length of 3 to 7 mm and containing 0.5% by mass of Compound A (pH of a 1% by mass aqueous suspension 8.44).
• the granular agrochemical composition thus obtained was put into water and observed after 30 minutes for the disintegrability of the granules to obtain a result that it was of a non-disintegration type.
• a 0.5 part portion of Compound A (pKa 5.75), 3 parts of distearyldimethylammonium chloride, 3 parts of ⁇ starch and 93.5 parts of calcium carbonate were uniformly blended in a high speed agitator and kneaded with addition of a suitable amount of water followed by extrusion by using a basket-type granulator through a screen of 1.2 mm mesh opening and the granulated material was dried by standing at 60° C. to obtain a granular agrochemical composition having a diameter of 1.1 to 1.3 mm and a length of 3 to 7 mm and containing 0.5% by mass of Compound A (pH of a 1% by mass aqueous suspension 8.68).
• the granular agrochemical composition thus obtained was put into water and observed after 30 minutes for the disintegrability of the granules to obtain a result that it was of a non-disintegration type.
• a 0.5 part portion of Compound A (pKa 5.75) and 5 parts of calcium carbonate were uniformly blended and crushed with a hammer mill. Together with the powder thus obtained, 2 parts of distearyldimethylammonium chloride, 3 parts of ⁇ starch and 89.5 parts of clay were uniformly blended in a high speed agitator and kneaded with addition of a suitable amount of water followed by extrusion by using a basket-type granulator through a screen of 1.2 mm mesh opening and the granulated material was dried by standing at 60° C.
• a granular agrochemical composition having a diameter of 1.1 to 1.3 mm and a length of 3 to 7 mm and containing 0.5% by mass of Compound A (pH of a 1% by mass aqueous suspension 8.51).
• the granular agrochemical composition thus obtained was put into water and observed after 30 minutes for the disintegrability of the granules to obtain a result that it was of a non-disintegration type.
• a 0.5 part portion of Compound B (pKa 6.17) and 5 parts of calcium carbonate were uniformly blended and crushed with a hammer mill. Together with the powder thus obtained, 2 parts of distearyldimethylammonium chloride, 3 parts of ⁇ starch and 89.5 parts of clay were uniformly blended in a high speed agitator and kneaded with addition of a suitable amount of water followed by extrusion by using a basket-type granulator through a screen of 1.2 mm mesh opening and the granulated material was dried by standing at 60° C.
• a granular agrochemical composition having a diameter of 1.1 to 1.3 mm and a length of 3 to 7 mm and containing 0.5% by mass of Compound B (pH of a 1% by mass aqueous suspension 8.93).
• the granular agrochemical composition thus obtained was put into water and observed after 30 minutes for the disintegrability of the granules to obtain a result that it was of a non-disintegration type.
• a 0.5 part portion of Compound B (pKa 6.17) and 1 part of calcium carbonate were uniformly blended and crushed with a hammer mill. Together with the powder thus obtained, 2 parts of dilauryldimethylammonium chloride, 3 parts of ⁇ starch and 93.5 parts of clay, which gave a 1% by weight aqueous suspension having a pH of 4.2, were uniformly blended in a high speed agitator and kneaded with addition of a suitable amount of water followed by extrusion by using a basket-type granulator through a screen of 1.2 mm mesh opening and the granulated material was dried by standing at 60° C.
• a granular agrochemical composition having a diameter of 1.1 to 1.3 mm and a length of 3 to 7 mm and containing 0.5% by mass of Compound B (pH of a 1% by mass aqueous suspension 4.28).
• the granular agrochemical composition thus obtained was put into water and observed after 30 minutes for the disintegrability of the granules to obtain a result that it was of a non-disintegration type.
• a 0.5 part portion of Compound B (pKa 6.17) and 5 parts of calcium carbonate were uniformly blended and crushed with a hammer mill. Together with the powder thus obtained, 2 parts of dilauryldimethylammonium chloride, 3 parts of ⁇ starch and 89.5 parts of clay, which gave a 1% by weight aqueous suspension having a pH of 4.2, were uniformly blended in a high speed agitator and kneaded with addition of a suitable amount of water followed by extrusion by using a basket-type granulator through a screen of 1.2 mm mesh opening and the granulated material was dried by standing at 60° C.
• a granular agrochemical composition having a diameter of 1.1 to 1.3 mm and a length of 3 to 7 mm and containing 0.5% by mass of Compound B (pH of a 1% by mass aqueous suspension 5.81).
• the granular agrochemical composition thus obtained was put into water and observed after 30 minutes for the disintegrability of the granules to obtain a result that it was of a non-disintegration type.
• a 0.5 part portion of Compound B (pKa 6.17) and 10 parts of calcium carbonate were uniformly blended and crushed with a hammer mill. Together with the powder thus obtained, 2 parts of dilauryldimethylammonium chloride, 3 parts of ⁇ starch and 84.5 parts of clay were uniformly blended in a high speed agitator and kneaded with addition of a suitable amount of water followed by extrusion by using a basket-type granulator through a screen of 1.2 mm mesh opening and the granulated material was dried by standing at 60° C.
• a granular agrochemical composition having a diameter of 1.1 to 1.3 mm and a length of 3 to 7 mm and containing 0.5% by mass of Compound B (pH of a 1% by mass aqueous suspension 8.62).
• the granular agrochemical composition thus obtained was put into water and observed after 30 minutes for the disintegrability of the granules to obtain a result that it was of a non-disintegration type.
• a 0.5 part portion of Compound A (pKa 5.75) and 1 part of calcium carbonate were uniformly blended and crushed with a hammer mill. Together with the powder thus obtained, 2 parts of dilauryldimethylammonium chloride, 3 parts of ⁇ starch and 93.5 parts of clay, which gave a 1% by weight aqueous suspension having a pH of 4.2, were uniformly blended in a high speed agitator and kneaded with addition of a suitable amount of water followed by extrusion by using a basket-type granulator through a screen of 1.2 mm mesh opening and the granulated material was dried by standing at 60° C.
• a granular agrochemical composition having a diameter of 1.1 to 1.3 mm and a length of 3 to 7 mm and containing 0.5% by mass of Compound A (pH of a 1% by mass aqueous suspension 4.07).
• the granular agrochemical composition thus obtained was put into water and observed after 30 minutes for the disintegrability of the granules to obtain a result that it was of a non-disintegration type.
• a 0.5 part portion of Compound A (pKa 5.75) and 5 parts of calcium carbonate were uniformly blended and crushed with a hammer mill. Together with the powder thus obtained, 2 parts of dilauryldimethylammonium chloride, 3 parts of ⁇ starch and 89.5 parts of clay were uniformly blended in a high speed agitator and kneaded with addition of a suitable amount of water followed by extrusion by using a basket-type granulator through a screen of 1.2 mm mesh opening and the granulated material was dried by standing at 60° C.
• a granular agrochemical composition having a diameter of 1.1 to 1.3 mm and a length of 3 to 7 mm and containing 0.5% by mass of Compound A (pH of a 1% by mass aqueous suspension 8.51).
• the granular agrochemical composition thus obtained was put into water and observed after 30 minutes for the disintegrability of the granules to obtain a result that it was of a non-disintegration type.
• a 2 parts portion of tricyclazole (pKa 1.6) and 5 parts of calcium carbonate were uniformly blended and crushed with a hammer mill. Together with the powder thus obtained, 2 parts of distearyldimethylammonium chloride, 3 parts of ⁇ starch and 88 parts of clay were uniformly blended in a high speed agitator and kneaded with addition of a suitable amount of water followed by extrusion by using a basket-type granulator through a screen of 1.2 mm mesh opening and the granulated material was dried by standing at 60° C.
• a granular agrochemical composition having a diameter of 1.1 to 1.3 mm and a length of 3 to 7 mm and containing 2% by mass of tricyclazole (pH of a 1% by mass aqueous suspension 8.17).
• the granular agrochemical composition thus obtained was put into water and observed after 30 minutes for the disintegrability of the granules to obtain a result that it was of a non-disintegration type.
• a 2 parts portion of EDDP (pKa 10.5), 5 parts of calcium carbonate and 1 part of fumed silica were uniformly blended and crushed with a hammer mill. Together with the powder thus obtained, 2 parts of distearyldimethylammonium chloride, 3 parts of ⁇ starch and 87 parts of clay were uniformly blended in a high speed agitator and kneaded with addition of a suitable amount of water followed by extrusion by using a basket-type granulator through a screen of 1.2 mm mesh opening and the granulated material was dried by standing at 60° C.
• a granular agrochemical composition having a diameter of 1.1 to 1.3 mm and a length of 3 to 7 mm and containing 2% by mass of EDDP (pH of a 1% by mass aqueous suspension 7.53).
• the granular agrochemical composition thus obtained was put into water and observed after 30 minutes for the disintegrability of the granules to obtain a result that it was of a non-disintegration type.
• a 2 parts portion of PHC (pKa 11.5) and 5 parts of calcium carbonate were uniformly blended and crushed with a hammer mill. Together with the powder thus obtained, 2 parts of distearyldimethylammonium chloride, 3 parts of ⁇ starch and 88 parts of clay were uniformly blended in a high speed agitator and kneaded with addition of a suitable amount of water followed by extrusion by using a basket-type granulator through a screen of 1.2 mm mesh opening and the granulated material was dried by standing at 60° C.
• a granular agrochemical composition having a diameter of 1.1 to 1.3 mm and a length of 3 to 7 mm and containing 2% by mass of PHC (pH of a 1% by mass aqueous suspension 8.86).
• the granular agrochemical composition thus obtained was put into water and observed after 30 minutes for the disintegrability of the granules to obtain a result that it was of a non-disintegration type.
• a 0.5 part portion of bensulfuron-methyl and 10.0 parts of calcium carbonate were uniformly blended and crushed with a hammer mill. Together with the powder thus obtained, 2 parts of sodium alkylbenzenesulfonate, 3 parts of ⁇ starch and 84.5 parts of clay were uniformly blended in a high speed agitator and kneaded with addition of a suitable amount of water followed by extrusion by using a basket-type granulator through a screen of 1.2 mm mesh opening and the granulated material was dried by standing at 60° C. to obtain a granular agrochemical composition containing 0.5% by mass of bensulfuron-methyl and 2% by mass of sodium alkylbenzenesulfonate (pH of a 1% by mass aqueous suspension 8.35).
• a 0.5 part portion of pyrazosulfuron-ethyl, 2 parts of paraffin (melting point 68 to 70° C.) and 1 part of basic fumed silica were blended under melting at 80° C. and, after being cooled to room temperature, crushed with a hammer mill. Together with the powder thus obtained, 3 parts of ⁇ starch, 25 parts of sodium bentonite and 68.5 parts of talc were uniformly blended in a high speed agitator and kneaded with addition of a suitable amount of water followed by extrusion by using a basket-type granulator through a screen of 1.2 mm mesh opening and the granulated material was dried by standing at 60° C. to obtain a granular agrochemical composition containing 0.5% by mass of pyrazosulfuron-ethyl (pH of a 1% by mass aqueous suspension 9.35).
• a 0.5 part portion of bensulfuron-methyl, 15 parts of sodium bentonite and 5 parts of activated carbon were uniformly blended and crushed with a hammer mill. Together with the powder thus obtained, 3 parts of ⁇ starch and 76.5 parts of talc were uniformly blended in a high speed agitator and kneaded with addition of a suitable amount of water followed by extrusion by using a basket-type granulator through a screen of 1.2 mm mesh opening and the granulated material was dried by standing at 60° C. to obtain a granular agrochemical composition containing 0.5% by mass of bensulfuron-methyl (pH of a 1% by mass aqueous suspension 7.89).
• a 0.5 part portion of bensulfuron-methyl and 8 parts of N-methyl-2-pyrrolidone were blended to obtain a bensulfuron-methyl solution.
• the bensulfuron-methyl solution prepared as above was added on 91.5 parts of a natural base of basic acid clays, which had a particle size of 16 to 35 mesh (1000 to 425 ⁇ m) and gave a 1% aqueous suspension having a pH of 7 to 10, to be adsorbed thereon for granulation to give granules of the agrochemical composition containing 0.5% by mass of bensulfuronmethyl (pH of a 1% by mass aqueous suspension 8.39).
• a 0.5 part portion of bensulfuron-methyl, 4.5 parts of dymron, 25 parts of sodium bentonite, 3 parts of ⁇ starch and 67 parts of talc were uniformly blended in a high speed agitator and kneaded with addition of a suitable amount of water followed by extrusion by using a basket-type granulator through a screen of 1.2 mm mesh opening and the granulated material was dried by standing at 60° C. to obtain a granular agrochemical composition containing 0.5% by mass of bensulfuron-methyl and 4.5% by mass of dymron (pH of a 1% by mass aqueous suspension 9.12).
• a 0.5 part portion of Compound A, 2 parts of sodium alkylbenzenesulfonate, 3 parts of ⁇ starch and 94.5 parts of calcium carbonate were uniformly blended in a high speed agitator and kneaded with addition of a suitable amount of water followed by extrusion by using a basket-type granulator through a screen of 1.2 mm mesh opening and the granulated material was dried by standing at 60° C. to obtain a granular agrochemical composition containing 0.5% by mass of Compound A (pH of a 1% by mass aqueous suspension 8.85).
• a 2 parts portion of bensulfuron-methyl, 3 parts of polyvinyl alcohol, 2 parts of basic fumed silica and 15 parts of calcium carbonate were uniformly blended in a high speed agitator and kneaded with addition of a suitable amount of water followed by extrusion by using a basket-type granulator through a screen of 0.6 mm mesh opening and the granulated material was dried by standing at 60° C. to obtain a bensulfuron-methyl containing base.
• a 2 parts portion of Compound B, 3 parts of polyvinyl alcohol, 2 parts of basic fumed silica and 15 parts of calcium carbonate were uniformly blended in a high speed agitator and kneaded with addition of a suitable amount of water followed by extrusion by using a basket-type granulator through a screen of 0.6 mm mesh opening and the granulated material was dried by standing at 60° C. to obtain a bensulfuron-methyl containing base.
• a 0.5 part portion of bensulfuron-methyl (pKa 5.03) and 5 parts of calcium carbonate were uniformly blended and crushed with a hammer mill. Together with the powder thus obtained, 3 parts of ⁇ starch and 91.5 parts of clay were uniformly blended in a high speed agitator and kneaded with addition of a suitable amount of water followed by extrusion by using a basket-type granulator through a screen of 1.2 mm mesh opening and the granulated material was dried by standing at 60° C. to obtain a granular agrochemical composition containing 0.5% by mass of bensulfuron-methyl (pH of a 1% by mass aqueous suspension 9.01). The granular agrochemical composition thus obtained was put into water and observed after 30 minutes for the disintegrability of the granules to obtain a result that it was of a non-disintegration type.
• a 0.5 part portion of Compound A (pKa 5.75) and 5 parts of calcium carbonate were uniformly blended and crushed with a hammer mill. Together with the powder thus obtained, 3 parts of ⁇ starch and 91.5 parts of clay were uniformly blended in a high speed agitator and kneaded with addition of a suitable amount of water followed by extrusion by using a basket-type granulator through a screen of 1.2 mm mesh opening and the granulated material was dried by standing at 60° C. to obtain a granular agrochemical composition having a diameter of 1.1 to 1.3 mm and a length of 3 to 7 mm and containing 0.5% by mass of Compound A (pH of a 1% by mass aqueous suspension 8.68). The granular agrochemical composition thus obtained was put into water and observed after 30 minutes for the disintegrability of the granules to obtain a result that it was of a non-disintegration type.
• the powder thus obtained was uniformly blended in a high speed agitator and kneaded with addition of a suitable amount of water followed by extrusion by using a basket-type granulator through a screen of 1.2 mm mesh opening and the granulated material was dried by standing at 60° C.
• a granular agrochemical composition having a diameter of 1.1 to 1.3 mm and a length of 3 to 7 mm and containing 0.5% by mass of Compound A (pH of a 1% by mass aqueous suspension 4.54).
• the granular agrochemical composition thus obtained was put into water and observed after 30 minutes for the disintegrability of the granules to obtain a result that it was of a non-disintegration type.
• a 0.5 part portion of Compound B (pKa 6.17) and 5 parts of calcium carbonate were uniformly blended and crushed with a hammer mill. Together with the powder thus obtained, 3 parts of ⁇ starch and 91.5 parts of clay were uniformly blended in a high speed agitator and kneaded with addition of a suitable amount of water followed by extrusion by using a basket-type granulator through a screen of 1.2 mm mesh opening and the granulated material was dried by standing at 60° C. to obtain a granular agrochemical composition having a diameter of 1.1 to 1.3 mm and a length of 3 to 7 mm and containing 0.5% by mass of Compound B (pH of a 1% by mass aqueous suspension 8.72). The granular agrochemical composition thus obtained was put into water and observed after 30 minutes for the disintegrability of the granules to obtain a result that it was of a non-disintegration type.
• the powder thus obtained was uniformly blended in a high speed agitator and kneaded with addition of a suitable amount of water followed by extrusion by using a basket-type granulator through a screen of 1.2 mm mesh opening and the granulated material was dried by standing at 60° C.
• a granular agrochemical composition having a diameter of 1.1 to 1.3 mm and a length of 3 to 7 mm and containing 0.5% by mass of Compound B (pH of a 1% by mass aqueous suspension 4.77).
• the granular agrochemical composition thus obtained was put into water and observed after 30 minutes for the disintegrability of the granules to obtain a result that it was of a non-disintegration type.
• a 2 parts portion of tricyclazole (pKa 1.6) and 5 parts of calcium carbonate were uniformly blended and crushed with a hammer mill. Together with the powder thus obtained, 3 parts of ⁇ starch and 90 parts of clay were uniformly blended in a high speed agitator and kneaded with addition of a suitable amount of water followed by extrusion by using a basket-type granulator through a screen of 1.2 mm mesh opening and the granulated material was dried by standing at 60° C. to obtain a granular agrochemical composition having a diameter of 1.1 to 1.3 mm and a length of 3 to 7 mm and containing 2% by mass of tricyclazole (pH of a 1% by mass aqueous suspension 8.79). The granular agrochemical composition thus obtained was put into water and observed after 30 minutes for the disintegrability of the granules to obtain a result that it was of a non-disintegration type.
• a 2 parts portion of EDDP (pKa 10.5), 5 parts of calcium carbonate and 1 part of fumed silica were uniformly blended and crushed with a hammer mill. Together with the powder thus obtained, 3 parts of ⁇ starch and 89 parts of clay were uniformly blended in a high speed agitator and kneaded with addition of a suitable amount of water followed by extrusion by using a basket-type granulator through a screen of 1.2 mm mesh opening and the granulated material was dried by standing at 60° C.
• a granular agrochemical composition having a diameter of 1.1 to 1.3 mm and a length of 3 to 7 mm and containing 2% by mass of EDDP (pH of a 1% by mass aqueous suspension 8.32).
• the granular agrochemical composition thus obtained was put into water and observed after 30 minutes for the disintegrability of the granules to obtain a result that it was of a non-disintegration type.
• a 2 parts portion of PHC (pKa 11.5) and 5 parts of calcium carbonate were uniformly blended and crushed with a hammer mill. Together with the powder thus obtained, 3 parts of ⁇ starch and 90 parts of clay were uniformly blended in a high speed agitator and kneaded with addition of a suitable amount of water followed by extrusion by using a basket-type granulator through a screen of 1.2 mm mesh opening and the granulated material was dried by standing at 60° C. to obtain a granular agrochemical composition having a diameter of 1.1 to 1.3 mm and a length of 3 to 7 mm and containing 2% by mass of PHC (pH of a 1% by mass aqueous suspension 9.27). The granular agrochemical composition thus obtained was put into water and observed after 30 minutes for the disintegrability of the granules to obtain a result that it was of a non-disintegration type.
• a 100 cm 2 wide plastic pot was filled with a paddy field soil and, after watering and shuffling, seeds of each of early watergrass ( Echinochloa oryzoides ), heartshape false pickerelweed ( Monochoria vaginalis ) and HOTARU-I ( Scirpus juncoides ) were sowed in a depth of 0.5 cm. Further, two paddy rice plants at the two-leaves stage were transplanted in a transplanting depth of 2 cm followed by pooling of water in a depth of 5 cm.
• each of the granular agrochemical compositions obtained in Examples 3, 5, 6 and 7 and Comparative Example 6 was evenly applied for treatment in an amount relative to the amount of the effective ingredient corresponding to 5 g/10 ares by weighing.
• the plants on these plastic pots were grown in a greenhouse and, after 28 days, evaluation was made by the following criteria for the herbicidal effects and the extent of chemical damages. The results are shown in Table 5.
• a 200 cm 2 wide plastic pot filled with a paddy field soil was watered and the soil was shuffled followed by introduction of water to give a water depth of 5 cm and one of the granular agrochemical compositions obtained in Examples 5, 6 and 7 and Comparative Example 6 was applied thereto by weighing in such an amount as to correspond to 2.5 g/10 ares relative to the amount of the effective ingredient. From just after this treatment, water leak was caused from the bottom of the plastic pot for 3 days at a rate of 2 cm per day and the water leak was followed by introduction of water from above the plastic pot to make up a water depth of 5 cm.
• Table 7 indicates that, when the pKa of the acidic agrochemically active ingredient was 2 to 7, the dissolved ratio in water of the compound A and compound B as a difluoromethane sulfonylanilide derivative in particular was strongly suppressed. An effect of suppressing dissolved ratio in water was also noted in Example 25 for an insecticidal agent and in Examples 23 and 24 for a bactericidal agent.
• Table 8 indicates that the dissolved ratio in water was suppressed by increasing the content of the basic substance while the dissolved ratio in water was suppressed when the pH of the granular agrochemical composition as a 1% by weight aqueous suspension was higher than the pKa of the acidic agrochemically active ingredient.
• the granular agrochemical composition of the invention can be prepared in a simple formulation and can moderately impart sustained releasability to the dissolution of the agrochemically active ingredient, thereby, to exhibit the efficacy of the agrochemically ingredient over a long time and a remarkable effect can be obtained that, by decreasing the rate of release of the agrochemically ingredient into the environments, the load on the environments can be decreased and the chemical damages, such as the chemical damages against target crops, caused by the agrochemically active ingredient can be alleviated or prevented.

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