JP2002012509A - Solid herbicidal composition - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a stable solid herbicidal composition. SOLUTION: This solid herbicidal composition comprises (1) 1-(4,6- dimethoxypyrimidin-2-yl)-3-(3-trifluoromethyl-2-pyridylsulfonyl)urea or its salt, (2) at least one kind selected from the group consisting of N-(phosphonomethyl) glycine, 4-[hydroxy(methyl)phosphinoyl]homoalanine and 4-[hydroxy(methyl) phosphinoyl]homoalanylalanylalanine and salts thereof, (3) a surfactant and (4) a stabilizer.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to (1) 1- (4,
6-dimethoxypyrimidin-2-yl) -3- (3-trifluoromethyl-2-pyridylsulfonyl) urea (generic name: flazasulfuron) or a salt thereof, (2) N- (phosphonomethyl) glycine (general Names: glyphosate), 4- [hydroxy (methyl) phosphinoyl] homoalanine (generic name: glufosinate), 4- [hydroxy (methyl) phosphinoyl] homoalanylalanylalanine (generic name: bilanafos; bilanafos) and The present invention relates to a solid herbicidal composition containing at least one selected from the group consisting of salts thereof, (3) a surfactant, and (4) a stabilizer. The present invention is also a method for inhibiting the growth of undesired plants using the solid herbicidal composition.

[0002]

2. Description of the Related Art Japanese Patent Application Laid-Open No. 5-271221 discloses a herbicidal composition containing as an active ingredient flazasulfuron or a salt thereof and at least one selected from the group consisting of glyphosate, glufosinate, vilanaphos and salts thereof. An improved herbicidal composition characterized in that an inorganic magnesium salt is added to the composition. Here, stabilization of the active ingredient in the spray liquid when the improved herbicidal composition is diluted with water and spraying, improvement of the acidity of the spray liquid and suppression of the hygroscopicity of the preparation are performed by adding an inorganic magnesium salt. It is done by. JP-A-5-9101 discloses an agricultural chemical composition containing a) an agricultural chemical active ingredient, b) a surfactant, c) a carbonate, d) a solid acid, and e) boron oxide and / or metaboric acid. Has been described. Here, the suppression of carbon dioxide gas generation due to the reaction between the carbonate and the solid acid during storage of the pesticide composition is caused by boron oxide and / or
Alternatively, it is performed by adding metaboric acid. Thus, the present invention, that is, the stabilization of furazasulfuron with time,
There is no description or suggestion in these prior arts about solid herbicidal compositions made with particular stabilizers.

[0003]

SUMMARY OF THE INVENTION The present inventors have developed a herbicidal composition comprising flazasulfuron or a salt thereof and at least one selected from the group consisting of glyphosate, glufosinate, vilanaphos and salts thereof as active ingredients. Various investigations were conducted to find a product having excellent temporal stability of furazasulfuron, and the present invention was completed.

[0004]

That is, the present invention provides (1) furazasulfuron or a salt thereof, (2) at least one selected from the group consisting of glyphosate, glufosinate, vilanaphos and salts thereof, (3) interface It is a solid herbicidal composition containing an activator and (4) a stabilizer.

As the salt of furazasulfuron, any salt may be used as long as it is agriculturally acceptable. Examples thereof include alkali metal salts such as sodium and potassium, alkaline earth metal salts such as magnesium and calcium, and monomethylamine. , Monoisopropylamine, dimethylamine,
Examples thereof include amine salts such as diisopropylamine and triethylamine, and salts of quaternary ammonium bases such as trimethylethylammonium cation and tetramethylammonium cation.

As the glyphosate salt, any salt may be used as long as it is agriculturally acceptable. For example, the same salts as the above-mentioned furazasulfuron salts, furthermore, trialkylsulfonium salts, trialkylsulfoxonium salts And ammonium salts. Of these, sodium salts (mono, di, sesqui, and tri), ammonium salts, isopropylamine salts, and trimethylsulfonium salts are preferable.

The glufosinate or vilanaphos salt may be any salt as long as it is agriculturally acceptable. Examples thereof include salts with inorganic or organic bases, among which sodium salts, ammonium salts, and alkyl-substituted salts. Ammonium salts are preferred. Glufosinate or vilanaphos has optical isomers, and the present invention includes both isomers and racemates.

Examples of the surfactant include anionic surfactants such as fatty acid salts, alkyl sulfosuccinates, polycarboxylates, alkyl sulfates, alkyl sulfates, alkyl aryl sulfates, alkyl diglycol ether sulfates. , Alcohol sulfates, alkyl sulfonates, alkyl aryl sulfonates, aryl sulfonates, lignin sulfonates, alkyl diphenyl ether disulfonates, polystyrene sulfonates, alkyl phosphates, alkyl aryl phosphates, Styryl aryl phosphate, polyoxyethylene alkyl ether sulfate, polyoxyethylene alkyl aryl ether sulfate, polyoxyethylene alkyl aryl ether sulfate, polyoxyethylene alkyl -Phosphate, polyoxyethylene alkyl ether phosphate, polyoxyethylene alkylaryl phosphate, polyoxyethylene styryl aryl ether sulfate, polyoxyethylene styryl aryl ether phosphate, polyoxyethylene styryl aryl ether phosphorus Acid ester salts,
Examples include salts of naphthalenesulfonic acid formalin condensate, polyacrylates, and mixtures of two or more of these. Among these anionic surfactants, alkyl sulfosuccinates are preferred. Among them, dialkyl sulfosuccinate is desirable.

As the surfactant, a nonionic surfactant such as polyoxyethylene alkyl ether,
Polyoxyethylene alkylaryl ether, polyoxyethylene alkylaryl ether formaldehyde condensate, polyoxyethylene alkylene aryl ether, polyoxyalkylene alkyl ester, polyoxyalkylene alkyl sorbitan ester, polyoxyalkylene alkyl sorbitol ester, polyoxyalkylene alkyl glycerol ester , Polyoxyalkylene block copolymer, polyoxyalkylene block copolymer alkyl glycerol ester, polyoxyalkylene alkyl sulfonamide, polyoxyalkylene rosin ester, polyoxypropylene block copolymer, polyoxyethylene oleyl ether,
Polyoxyalkylene alkylphenols, these two
Species or a mixture of three or more kinds.

[0010] The stabilizing agent is one that provides stability over time of furazasulfuron, for example, a substance that has an action such as a hydrolysis inhibitor that suppresses the hydrolysis of furazasulfuron. Boric anhydride (B
₂ O ₃ ), metaboric acid (HBO ₂ ), quicklime (CaO), barium oxide
(BaO), orthoboric acid _{(H 3 BO 3, B (} OH) 3), aluminum oxide (Al ₂ O _3), magnesium oxide (MgO), sodium aluminate (NaAlO _2), iron oxide (FeO, α-Fe ₂ O ₃ , γ-Fe ₂ O ₃ , Fe
₃ O ₄ ), silica gel, anhydrous calcium chloride, calcium hydride (CaH ₂ ), lithium aluminum hydride (LiAlH ₄ ), anhydrous sodium sulfate, anhydrous copper sulfate, anhydrous calcium sulfate,
Desiccants such as zeolites, calcium silicate, titanium oxide, silicon dioxide, activated carbon, sodium aluminate;
Inorganic magnesium salts such as magnesium carbonate, magnesium hydroxide, magnesium sulfate, magnesium chloride, and magnesium nitrate; and mixtures of two or more thereof. Desiccants are desirable among stabilizers. Further, boric anhydride, metaboric acid, quicklime, barium oxide, zeolite, calcium silicate, magnesium oxide, magnesium sulfate are desirable, among which boric anhydride, metaboric acid, quicklime, barium oxide, zeolite,
Calcium silicate is desirable, boric anhydride and metaboric acid are more desirable, and boric anhydride is particularly desirable.

In the present invention, various auxiliaries can be appropriately compounded. Examples thereof include carriers, acid acceptors, binders and other auxiliaries.

Examples of the carrier include diatomaceous earth, slaked lime, calcium carbonate, talc, siegrite, white carbon, bentonite, starch, sodium carbonate, baking soda,
Examples include clay, zeolite, ammonium sulfate, ammonium hydrogen sulfate, sodium sulfate, sodium chloride, potassium chloride, and mixtures of two or more of these. Among these carriers, ammonium sulfate is desirable.

In the present invention, when preparing a solid herbicidal composition containing (1) furazasulfuron or a salt thereof, (2) glyphosate (acid), (3) a surfactant and (4) a stabilizer, Acid acceptors can be incorporated to form the corresponding glyphosate salt. As such an acid acceptor, for example, an inorganic acid salt or an organic acid salt of an alkali metal (sodium, potassium or the like) or an inorganic acid salt or an organic acid salt of ammonium, specifically, an alkali metal or ammonium carbonate, Bicarbonate, metaborate, tetraborate, acetate, citrate, formate, oxalate, phosphate, tripolyphosphate, metaphosphate, propionate, pyrophosphate, metasilicate, Orthosilicates, sulfites, thiosulfates; hydroxides of alkali metals (sodium, potassium, etc.), specifically sodium hydroxide, potassium hydroxide; mixtures of two or more of these . Of these acid acceptors, alkali metal carbonates are preferred. Among them, sodium carbonate is desirable.

Examples of the binder include various gums such as guar gum, locust bean gum, tragacanth gum, xanthan gum and gum arabic; alginic acid derivatives such as sodium alginate, ammonium alginate and propylene glycol alginate; polyvinyl alcohol, polyvinylpyrrolidone, polyvinyl Organic high molecular compounds such as methacrylate, polyethylene oxide, polyacrylic acid, sodium polyacrylate, polyacrylamide; animal or vegetable water-soluble proteins such as egg white, albumin, casein, gelatin; methylcellulose, carboxy Methylcellulose, sodium carboxymethylcellulose, carboxyethylcellulose, hydroxyethylcellulose, hydroxypropylcellulose, Cellulose derivatives such as roxypropyl methylcellulose; starches such as dextrin, starch, sodium carboxymethyl starch, hydroxyethyl starch and hydroxypropyl starch; lignin sulfonic acid derivatives such as sodium lignin sulfonate and calcium lignin sulfonate; Examples thereof include a mixture of two or more kinds.

The mixing ratio of each component in the solid herbicidal composition of the present invention is such that flazasulfuron or a salt thereof is 0.1 to 30 parts by weight, preferably 0.1 to 30 parts by weight, based on 100 parts by weight of the entire solid herbicidal composition. 10 parts by weight, at least one selected from the group consisting of glyphosate, glufosinate, vilanaphos and salts thereof is 0.1 to 80 parts by weight, preferably 0.1 to 60 parts by weight, and the surfactant is 0 to 10 parts by weight. 0.1 to 50 parts by weight, preferably 1 to 40 parts by weight, and 0.1 to 20 parts by weight of the stabilizer, preferably 1 to 1 part by weight.
5 parts by weight, 0.1 to 80 parts by weight, preferably 1 to 60 parts by weight when containing a carrier, and 0.1 to 30 parts by weight, preferably 1 to 30 parts by weight when containing an acid acceptor. 20
The amount is 0.1 to 20 parts by weight, preferably 0.5 to 10 parts by weight when a binder is contained.

The solid herbicidal composition of the present invention can be prepared by mixing the ingredients in any order (eg, mixing glyphosate and an acid acceptor, then mixing other ingredients), or It is prepared by mixing the ingredients at the same time. Examples of the formulation type include wettable powders, granules, wettable powders for granules, aqueous solvents, aqueous granules, tablets, and packs (packaged in water-soluble film or water-soluble paper, or filled in containers made of these. And the like). Formulation preparation method is performed according to a generally known method,
For example, in the case of a granular solid herbicidal composition such as a granule or a water dispersible granule, the mixed ingredients are mixed and kneaded with water, and an appropriate granulation method (extrusion granulation, spray drying granulation, fluidized bed granulation,
Tumbling granulation, stirring granulation, etc.) and, if desired, drying and sizing.

One preferred embodiment of the present invention is as follows. [A] A solid herbicidal composition containing furazasulfuron or a salt thereof, glyphosate or a salt thereof, a surfactant and a stabilizer. [B] A solid herbicidal composition containing furazasulfuron or a salt thereof, glyphosate or a salt thereof, a surfactant, a stabilizer and a carrier. [C] A solid herbicidal composition containing furazasulfuron or a salt thereof, glyphosate (acid), a surfactant, a stabilizer and an acid acceptor. [D] A solid herbicidal composition containing furazasulfuron or a salt thereof, glyphosate (acid), a surfactant, a stabilizer, an acid acceptor and a carrier. [E] the stabilizer is a hydrolysis inhibitor [a] to [d]
Solid herbicidal composition. [F] The solid herbicidal composition according to any one of [a] to [d], wherein the stabilizer is a desiccant. [G] The solid of [a] to [d], wherein the stabilizer is at least one member selected from the group consisting of boric anhydride, metaboric acid, quicklime, barium oxide, zeolite, calcium silicate, magnesium oxide and magnesium sulfate. Herbicidal composition. [H] The solid herbicidal composition according to [a] to [d], wherein the stabilizer is at least one selected from the group consisting of boric anhydride, metaboric acid, quicklime, barium oxide, zeolite and calcium silicate. [I] The solid herbicidal composition according to [a] to [d], wherein the stabilizer is at least one selected from the group consisting of boric anhydride and metaboric acid. [J] The solid herbicidal composition according to any one of [a] to [d], wherein the stabilizer is boric anhydride. [K] The solid herbicidal composition according to any one of [a] to [d], which is in a granular form. [1] The solid herbicidal composition according to any one of [a] to [d], which is in the form of a wettable powder. [M] The solid herbicidal composition according to any one of [a] to [d], which is in the form of a wettable powder. [N] The solid herbicidal composition according to any one of [a] to [d], which is in the form of a water solvent. [O] The solid herbicidal composition according to any one of [a] to [d], which is in the form of a granular water solvent.

[0018]

BEST MODE FOR CARRYING OUT THE INVENTION

EXAMPLES Examples of the present invention will be described below, but the present invention is not limited to these examples. First, formulation examples will be described.

Formulation Example 1 Furazasulfuron (purity 97.5%) 1.54 g Glyphosate (purity 87.9%) 28.94 g Dioctyl sulfosuccinate sodium salt 5.00 g (trade name: GEROPON SDS, manufactured by Rhodia Nichika) ) Boric anhydride 5.00 g Ammonium sulfate 46.94 g Sodium carbonate 9.58 g The above components were mixed, and 10 g of water was added and kneaded. Basket type extrusion granulator for kneaded material (0.8mm diameter screen)
After granulating with fluid and fluidized, sizing (14-60 mesh)
Thus, 100 g of a wettable powder for granules was obtained.

Formulation Example 2 Furazasulfuron (purity 97.5%) 1.54 g Glyphosate (purity 87.9%) 28.94 g GEROPON SDS 5.00 g Boric anhydride 5.00 g Ammonium sulfate 45.94 g Sodium carbonate 9.58 g 2.00 g of 50% aqueous solution of calcium ligninsulfonate (trade name: Sun Extract C, manufactured by Nippon Paper Industries Co., Ltd.) The above components were mixed, and kneaded, granulated,
The granules were dried and sized to obtain 100 g of wettable powder.

Formulation Example 3 Furazasulfuron (purity 97.5%) 1.54 g Glyphosate (purity 87.9%) 33.74 g GEROPON SDS 5.00 g Boric anhydride 5.00 g Ammonium sulfate 39.56 g Sodium carbonate 11.16 g Sun Extract C 2.00 g The above components were mixed, and kneaded, granulated, and mixed in the same manner as in Formulation Example 1.
The granules were dried and sized to obtain 100 g of wettable powder.

Formulation Example 4 Furazasulfuron (purity 97.5%) 1.54 g Glyphosate (purity 87.9%) 33.74 g GEROPON SDS 10.00 g Boric anhydride 5.00 g Ammonium sulfate 34.56 g Sodium carbonate 11.16 g Sun Extract C 2.00 g The above components were mixed, and kneaded, granulated, and mixed in the same manner as in Formulation Example 1.
The granules were dried and sized to obtain 100 g of wettable powder.

Formulation Example 5 Furazasulfuron (purity 97.5%) 1.54 g Glyphosate (purity 87.9%) 33.74 g GEROPON SDS 5.00 g Boric anhydride 5.00 g Ammonium sulfate 40.56 g Sodium carbonate 11.16 g The above components were mixed and kneaded, granulated,
The granules were dried and sized to obtain 100 g of wettable powder.

Formulation Example 6 Furazasulfuron (purity 95.1%) 1.54 g Glyphosate (purity 87.9%) 34.40 g GEROPON SDS 5.00 g Magnesium oxide 5.00 g Ammonium sulfate 44.84 g Sodium carbonate 11.38 g The components were mixed and kneaded, granulated,
The granules were dried and sized to obtain 100 g of wettable powder.

Formulation Example 7 Furazasulfuron (purity 95.1%) 1.54 g Glyphosate (purity 87.9%) 34.40 g GEROPON SDS 5.00 g Magnesium sulfate 5.00 g Ammonium sulfate 44.84 g Sodium carbonate 11.38 g The components were mixed and kneaded, granulated,
The granules were dried and sized to obtain 100 g of wettable powder.

Formulation Example 8 Furazasulfuron (purity 95.1%) 1.54 g Glyphosate (purity 87.9%) 34.40 g GEROPON SDS 5.00 g Calcium silicate 5.00 g Ammonium sulfate 44.84 g Sodium carbonate 11.38 g The above components were mixed and kneaded, granulated,
The granules were dried and sized to obtain 100 g of wettable powder.

Formulation Example 9 Furazasulfuron (purity 95.1%) 0.32 g Glyphosate (purity 87.9%) 3.00 g GEROPON SDS 15.00 g Boric anhydride 10.00 g Ammonium sulfate 65.94 g Sodium carbonate 1.10 g Sun Extract C 6.00g Mix ingredients other than Sun Extract C and add Sun Extract C to it.
And a mixed solution of 6 g of water and kneaded. The kneaded material was granulated by a basket-type extrusion granulator (diameter 0.8 mm screen), subjected to fluid drying, and then sized (14 to 60 mesh).
100 g of water dispersible granules were obtained.

Formulation Example 10 Furazasulfuron (purity 95.1%) 21.00 g Glyphosate (purity 87.9%) 56.80 g GEROPON SDS 0.50 g Boric anhydride 2.00 g Ammonium sulfate 5.50 g Sodium carbonate 18.00 g Sun Extract C 2.00 g The above components were mixed and kneaded, granulated, dried and sized in the same manner as in Preparation Example 9 except that 10 g of water was used, to obtain 100 g of a wettable powder for granules.

Formulation Example 11 Furazasulfuron (purity 95.1%) 1.54 g Glyphosate (purity 87.9%) 34.40 g GEROPON SDS 5.00 g Boric anhydride 5.00 g Ammonium sulfate 40.04 g Sodium carbonate 11.18 g Sun Extract C 10.00 g The above components were mixed and kneaded, granulated, dried and sized in the same manner as in Preparation Example 9 except that 3 g of water was used, to obtain 100 g of a wettable powder for granules.

Formulation Example 12 Furazasulfuron (purity 97.5%) 1.54 g Glufosinate (purity 95.2%) 34.20 g GEROPON SDS 5.00 g Ammonium sulfate 41.96 g Boric anhydride 5.00 g Sodium carbonate 10.30 g The above components were mixed and kneaded, granulated, dried and sized in the same manner as in Preparation Example 1 except that 12 g of water was used, to obtain 100 g of wettable granules.

Comparative Preparation Example 1 Furazasulfuron (purity 97.5%) 1.54 g Glyphosate (purity 87.9%) 33.74 g GEROPON SDS 5.00 g Ammonium sulfate 45.56 g Sodium carbonate 11.16 g Kneading, granulating, and
The granules were dried and sized to obtain 100 g of wettable powder.

Comparative Preparation Example 2 Furazasulfuron (purity 95.1%) 1.54 g Glyphosate (purity 87.9%) 34.40 g GEROPON SDS 5.00 g Ammonium sulfate 49.84 g Sodium carbonate 11.38 g Kneading, granulating, and
The granules were dried and sized to obtain 100 g of wettable powder.

Next, test examples will be described. Test Example 1 (Temporal stability test of furazasulfuron) About 30 g of the water dispersible granules obtained in Formulation Examples 1 to 8 and Comparative Formulation Examples 1 and 2 were placed in a glass screw-neck sample bottle, and subjected to various acceleration conditions. After storing in the above, the product was analyzed by liquid chromatography to determine the decomposition rate of furazasulfuron. The results are shown in Table 1.

[0034]

[Table 1]

Claims (12)

[Claims] (1) 1- (4,6-dimethoxypyrimidin-2-yl) -3- (3-trifluoromethyl-2)
-Pyridylsulfonyl) urea or a salt thereof, (2) N-
At least one selected from the group consisting of (phosphonomethyl) glycine, 4- [hydroxy (methyl) phosphinoyl] homoalanine, 4- [hydroxy (methyl) phosphinoyl] homoalanylalanylalanine and salts thereof, (3) surfactant And a solid herbicidal composition containing (4) a stabilizer. 2. The solid herbicidal composition according to claim 1, further comprising a carrier. 3. The solid herbicidal composition according to claim 1, wherein the stabilizer is a hydrolysis inhibitor. 4. The method according to claim 1, wherein the stabilizer is a desiccant.
Solid herbicidal composition. 5. The method according to claim 1, wherein the stabilizer is boric anhydride, metaboric acid, quicklime, barium oxide, zeolite, calcium silicate,
3. The solid herbicidal composition according to claim 1, which is at least one member selected from the group consisting of magnesium oxide and magnesium sulfate. 6. The method according to claim 1, wherein the stabilizer is at least one selected from the group consisting of boric anhydride, metaboric acid, quicklime, barium oxide, zeolite and calcium silicate.
Or the solid herbicidal composition of 2. 7. The solid herbicidal composition according to claim 1, wherein the stabilizer is at least one member selected from the group consisting of boric anhydride and metaboric acid. 8. (1) 1- (4,6-Dimethoxypyrimidin-2-yl) -3- (3-trifluoromethyl-2
-Pyridylsulfonyl) urea or a salt thereof in an amount of 0.1 to 3;
0 parts by weight, (2) N- (phosphonomethyl) glycine, 4
0.1-80 parts by weight of at least one selected from the group consisting of-[hydroxy (methyl) phosphinoyl] homoalanine, 4- [hydroxy (methyl) phosphinoyl] homoalanylalanylalanine and salts thereof;
(3) A solid herbicidal composition containing 0.1 to 50 parts by weight of a surfactant and (4) 0.1 to 20 parts by weight of a stabilizer. 9. The solid herbicidal composition according to claim 8, further comprising 0.1 to 80 parts by weight of a carrier. 10. A method for inhibiting undesired plant growth using the solid herbicidal composition according to claim 1. (1) 1- (4,6-dimethoxypyrimidin-2-yl) -3- (3-trifluoromethyl-
2-pyridylsulfonyl) urea or a salt thereof, (2) N
At least one selected from the group consisting of-(phosphonomethyl) glycine, 4- [hydroxy (methyl) phosphinoyl] homoalanine, 4- [hydroxy (methyl) phosphinoyl] homoalanylalanylalanine and salts thereof, (3) interface A solid herbicidal composition containing an activator and (4) a stabilizing agent, wherein the components (1) to (4) are kneaded with water and granulated to obtain a solid herbicidal composition. 12. (1) 1- (4,6-dimethoxypyrimidin-2-yl) -3- (3-trifluoromethyl-
2-pyridylsulfonyl) urea or a salt thereof, (2) N
At least one selected from the group consisting of-(phosphonomethyl) glycine, 4- [hydroxy (methyl) phosphinoyl] homoalanine, 4- [hydroxy (methyl) phosphinoyl] homoalanylalanylalanine and salts thereof, (3) interface A solid herbicidal composition containing an activator, (4) a stabilizer and (5) a carrier, wherein the solids are obtained by kneading and granulating the components (1) to (5) and granulating. Herbicidal composition.