JPH06145015A - Stabilized herbicide composition - Google Patents

Abstract

PURPOSE:To provide the stabilized herbicide composition prevented in its decomposition and used for upland fields by adding basic white carbon to a system comprising the mixture of a dinitroaniline herbicidal compound and a specific compound exhibiting a high activity in an extremely small amount and effective against broad-leaved weeds. CONSTITUTION:The herbicide composition is characterized by adding basic white carbon to the mixture of methyl 5-[[(4,6-dimethoxy-2-pyrimidinyl) amino]carbonylaminosulfonyl]-3-chloro-1-methyl-1-H-pyrazole-4-carboxylate of the formula with a dinitroaniline herbicide. The basic white carbon is preferably a white carbon giving a hydrogen ion index of >=8 when converted into a 10wt.% decomposable solution using pure water. The dinitroaniline herbicide compound includes alpha,alpha,alpha-trifluoro-2,6-dinitro-N,N-dipropyl-para-toluidine.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a herbicide composition for fields, which is prevented from decomposing and stabilized by using basic white carbon.

[0002]

BACKGROUND OF THE INVENTION Dinitroaniline herbicidally active compounds are mainly used as soil treatment agents for controlling weeds in upland fields, and have a particularly high control effect on annual grass weeds. On the other hand, methyl-5
-{[(4,6-dimethoxy-2-pyridinyl) amino] carbonylaminosulfonyl} -3-chloro-1-
Methyl-1-H-pyrazole-4-carboxylate (hereinafter abbreviated as compound A) shows a high herbicidal activity even in a very small amount, and is particularly effective for broad-leaved weeds. Further, it has excellent characteristics as a herbicide such as extremely low toxicity.
Conventionally, each of these drugs has been used alone.
Therefore, in order to control all the weeds in the field, a great deal of labor and time were required, such as spraying a single agent a plurality of times or mixing a plurality of agents on site and then applying them.

From the viewpoint of stability and safety of efficacy, if a mixture of dinitroaniline herbicidal active compound and compound A is used, a wide range of annual grass weeds and broadleaf weeds in the field can be saved. In addition, it can be controlled at the same time. However, although the compound A has excellent performances in safety and efficacy, it has a fatal defect that the compound A decomposes when it is mixed with a dinitroaniline herbicidally active compound. Therefore, as a technique for preventing the decomposition of the sulfonylurea herbicidally active compound, a method of adding vegetable oil or the like to the preparation has been conventionally known. (Japanese Patent Laid-Open No. 63-023806)

[0004]

However, in the mixture of the dinitroaniline herbicidally active compound and the compound A, even if the conventional technique as described above is applied, the compound A
Could not be prevented and its solution was desired.

[0005]

The present invention provides the formula (1):

[0006]

[Chemical 2]

Methyl-5-{[(4,6-dimethoxy-2-pyridinyl) amino] carbonylaminosulfonyl} -3-chloro-1-methyl-1-H-pyrazole-4-carboxylate ( The present invention relates to a herbicide composition having a good stability which prevents decomposition of Compound A during storage by adding basic white carbon to a mixture of Compound A) and a dinitroaniline herbicidally active compound.

The herbicidal composition of the present invention may contain a diluent and a surfactant, if necessary.

Examples of the dinitroaniline herbicidally active compound include α, α, α-trifluoro-2,6-dinitro-N, N-dipropyl-para-toluidine (generic name;
Trifluralin, abbreviated as compound below, N- (1-ethylpropyl) -3,4-dimethyl-2,6-dinitroaniline (generic name; pendimethalin, abbreviated as compound below), 5-dipropylamino-α , Α, α-trifluoro-4,6-dinitro-o-toluidine (generic name; prodiamine, abbreviated as compound below), 4- (methylsulfonyl) -2,6-dinitro-N, N-dipropylaniline (Generic name; nitraline, hereinafter abbreviated as compound) and the like.

White carbon is a general term for synthesized ultrafine powder of silicic acid anhydride, hydrous silicic acid, and hydrous calcium silicate, and when added to synthetic rubber and natural rubber like carbon black, it shows a rubber reinforcing effect. It is called white carbon because it is white. White carbon has a high oil absorption ability, and by utilizing this property, it is often used as a means for absorbing a liquid pesticide raw material at room temperature to powder it into a solid formulation such as powder, wettable powder and granules.
Some white carbons have different properties depending on the production method thereof, and basic white carbons have a hydrogen ion index of 8 or more when made into a 10 wt% dispersible liquid with pure water.

Examples of white carbon include products such as Carplex (trade name of Shionogi Pharmaceutical Co., Ltd.), Nipseal (trade name of Nippon Silica Industry Co., Ltd.), Tokuseal (trade name of Tokuyama Soda Co., Ltd.) There is. There are various types of white carbon such as acidic, neutral and basic depending on the brand.

The herbicidal composition of the present invention contains 1 to 60% by weight of dinitroaniline herbicidally active compound, 0.05 to 50% by weight of compound A, and 2 to 30% by weight of basic white carbon in the formulation. To prepare wettable powders, fine granules, granules, and wettable granules.

As the diluent, clay, talc, diatomaceous earth, bentonite, calcium carbonate or the like can be used.

As the surface active agent, nonionic surface active agents such as polyoxyethylene alkyl allyl ether, polyoxyethylene styryl phenyl ether, polyoxyethylene sorbitan fatty acid ester, and alkyl sulfonates, alkyl allyl sulfonates, Ionic surfactants such as alkyl sulfate ester salt, lignin sulfonate, alkyl naphthalene sulfonate formalin condensate, polyoxyethylene alkyl allyl ether sulfate, alkyl amine salt, dialkyl sulfosuccinate, polycarboxylate, etc. can give.

[0015]

EXAMPLES Next, the effect of preventing the decomposition of the active ingredient in the herbicidal composition of the present invention will be described with reference to Examples and Test Examples. The numbers in the formulation examples are parts by weight. Incidentally, sodium dodecylbenzene sulfonate is a surfactant and is one of the alkylallyl sulfonates. Hereinafter, the abbreviation DBS is used.

Example 1 Wettable powder Compound A 1 part Compound 10 Carplex # 1120 (manufactured by Shionogi Pharmaceutical Co., Ltd.) 2 DBS 3 Calcium lignin sulfonate 5 Clay 79 The above components were mixed, and a jet atomizer 0101 was used.
(Manufactured by Seishin Enterprise Co., Ltd.) to obtain a wettable powder.

Example 2 Wettable powder Compound A 2 parts Compound 40 Carplex # 100 (manufactured by Shionogi Pharmaceutical Co., Ltd.) 20 DBS 3 Calcium lignin sulfonate 5 Clay 30 The above components are mixed, and Jet omizer 0101 is mixed.
(Manufactured by Seishin Enterprise Co., Ltd.) to obtain a wettable powder.

Example 3 Wettable powder Compound A 2 parts Compound 50 Tokseal AL-1 (manufactured by Tokuyama Soda Co., Ltd.) 15 DBS 3 Calcium lignin sulfonate 5 Clay 25 The above components are mixed, and a jet atomizer 0101 is mixed.
(Manufactured by Seishin Enterprise Co., Ltd.) to obtain a wettable powder.

Example 4 Granules Compound A 0.2 parts Compound 5.0 Carplex # 100 (supra) 5.0 DBS 3.0 Calcium lignin sulfonate 5.0 Bentonite 20.0 Talc 61.8 Each of the above After mixing the ingredients, adding an appropriate amount of water and kneading,
Granulation was carried out by an extrusion granulator equipped with a screen having a pore size of 0.8 mm, dried at 50 ° C. for 2 hours, and granulated to obtain granules.

Example 5 Granules Compound A 0.1 parts Compound 2.0 Carplex # 1120 (previously mentioned) 5.0 DBS 3.0 Calcium lignin sulfonate 5.0 Bentonite 20.0 Talc 64.9 Each of the above After mixing the ingredients, adding an appropriate amount of water and kneading,
Granulation was carried out by an extrusion granulator equipped with a screen having a pore size of 0.8 mm, dried at 50 ° C. for 2 hours, and granulated to obtain granules.

Comparative Example 1 Wettable powder Compound A 2 parts Compound 40 Carplex # 67 (manufactured by Shionogi Pharmaceutical Co., Ltd.) 20 DBS 3 Calcium lignin sulfonate 5 Clay 30 The above components are mixed to prepare a jet omizer 0101.
(Manufactured by Seishin Enterprise Co., Ltd.) to obtain a wettable powder.

Comparative Example 2 Wettable powder Compound A 2 parts Compound 50 Carplex # 80 (manufactured by Shionogi Pharmaceutical Co., Ltd.) 15 DBS 3 Calcium lignin sulfonate 5 Clay 25 The above components are mixed to prepare a jet omizer 0101.
(Manufactured by Seishin Enterprise Co., Ltd.) to obtain a wettable powder.

Comparative Example 3 Granules Compound A 0.2 parts Compound 5.0 Carplex # 80 (supra) 5.0 Calcium lignin sulfonate 5.0 Bentonite 20.0 Talc 64.8 Mix the above ingredients After adding an appropriate amount of water and kneading,
Granulation was carried out by an extrusion granulator equipped with a screen having a pore size of 0.8 mm, dried at 50 ° C. for 2 hours, and granulated to obtain granules.

Test Example 1 Measurement of hydrogen ion index of white carbon Pure water was placed in a hard Erlenmeyer flask, boiled for 10 minutes, blocked with carbon dioxide and cooled to about 20 ° C. This pure water 90
In a 200 ml flask with a ground stopper, 10 g of a sample of white carbon was quickly added, and the bottle was sealed and shaken for 1 minute, and then left standing for 5 minutes. Without filtering this, an electrode was put in the liquid and the hydrogen ion concentration was measured. For the measurement, a glass electrode type hydrogen ion concentration meter F-15, manufactured by Horiba Ltd. was used.

Test Results 1 Types of White Carbon Hydrogen Ion Index Carplex # 67 7.5 Carplex # 80 5.6 Carplex # 100 9.8 Carplex # 1120 10.8 Tokseal AL-1 9.6 Nipseal NA 10.0

Test Example 2 The various preparations produced in the above Examples and Comparative Examples were placed in glass sample bottles with inner stoppers, stored in a constant temperature bath at 40 ° C. for 30 days, and then the active ingredients were analyzed by reverse phase high performance liquid chromatography. did. The decomposition rate of the active ingredient was calculated by the following formula.

Decomposition rate (%) = (1 − a / b) × 100, where a: active ingredient content (%) after storage b: active ingredient content (%) immediately after production Test result 2 Compound used A Dinitroaniline-based white carbon Decomposition rate% Compound decomposition rate% Example 1 Carplex # 1120 2.2 0.2 Example 2 Carplex # 100 1.3 0.1 Example 3 Tokusil AL-1 1.8 0 .1 Example 4 Carplex # 100 1.7 0 Example 5 Carplex # 1120 0.9 0 Comparative Example 1 Carplex # 67 28.6 0.1 Comparative Example 2 Carplex # 80 25.3 0.1 Comparative Example 3 Carplex # 80 21.7 0

[0028]

As shown in the test results, in the case of the preparation containing neutral or acidic white carbon, compound A is used.
However, when basic white carbon was added, the decomposition could be prevented as much as possible. In addition, the dinitroaniline compounds were stable in all the preparations, and no decomposition was observed.

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Claims (2)

[Claims] 1. Formula (1): Methyl-5-{[(4,6-dimethoxy-2
-Pyridinyl) amino] carbonylaminosulfonyl}
-3-Chloro-1-methyl-1-H-pyrazole-4-
A herbicidal composition comprising a mixture of a carboxylate and a dinitroaniline herbicidally active compound containing basic white carbon. 2. The herbicidal composition according to claim 1, further comprising basic white carbon having a hydrogen ion index of 8 or more when the dispersion liquid is 10% by weight of pure water.