KR950002850B1 - Herbicidal composition - Google Patents

Abstract

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Description

Herbicidal composition

The present invention provides a herbicidal composition containing a specific pyrazole compound and two active ingredients of 3,7-dichloro-8-quinolinecarboxylic acid, and N- (α, α-dimethylbenzyl) -α-bromo a herbicidal composition containing three active ingredients added with -tert-butylacetamide, 3-isopropyl-2, 1, 3-benzothiadiazinone- (4) -2, 2-dioxide or its sodium salt It is about.

In the present invention, the specific pyrazole derivatives are weeds of flowering plants and broadleaf in rice cultivation according to Japanese Patent Application Publication No. 56-28,885, Japanese Patent Application Publication No. 54-70,269, and the like. It is known to show a good effect for the 3,7-dichloro-8-quinulincarboxylic acid, according to the European Patent Application Publication No. 0060429, N- (α, α-dimethylbenzyl-α-bromo -tert-Butylacetamide is obtained according to Japanese Patent Application Laid-Open No. 55-43,014 and also 3-isopropyl-2, 1, 3-benzothiadiazinone- (4) -2, 2-dioxide. Or its sodium salt is known to be suitable as a herbicide in rice cultivation according to Japanese Patent Application Publication No. 49-7,436.

However, when the compound is used alone as a herbicide, it is not possible to obtain an effect that the user can be sufficiently satisfied with. Conventionally, various excellent herbicides have been developed for the control of nobies, konagi, annual broadleaf weeds, and matsubai of perennial weeds, which are the most problematic of the weeds. ), Has been used as a mixing agent. As a result, in recent years, as the weeds of the above-mentioned rice fields are controlled, the contention balance between weeds is broken, and not only the weeds but also weeds that could not be sufficiently controlled by conventional medicines, for example, tadpoles (Hotarui) and snares (urikawa) ), Perennial weeds, such as mizugayatsuri, became dominant and harmed rice. In addition, these rice weeds coexist and grow in the same region, and germination and growth time of each individual are not the same. Therefore, the spread of herbicides is to be carried out for different types of weeds, including the perennial variety, and the growing stage, and it is actually a little difficult to control all the weeds with one herbicide spread. Even if the herbicide is spread, if there is any residual weeds, they germinate late, and once the ground part dies, it regenerates and becomes lush, so that the effect of the production spread is halved. In order to make up for this drawback, so-called system scattering, which has been distributed more than once, has been performed. However, in recent years, the cost, effort, environmental pollution, etc. required for weed control have become a problem, and one spread can control a wide range of weeds with different growth stages, and the weed suppression effect lasts for a long time. Moreover, the emergence of herbicides that does not cause chemical damage to rice is strongly desired.

The present inventors conducted a study to increase the herbicidal effect of the specific pyrazole derivatives, and as a result, a combination of two active ingredients of a specific pyrazole derivative and 3,7-dichloro-8-quinolinecarboxylic acid was applied. , And here, N- (α, α-dimethylbenzyl) -α-bromo-tert-butylacetamide, 3-isopropyl-2, 1, 3-benzothiadiazinone- (4)- When three kinds of active ingredients added with 2, 2-dioxide or its sodium salt are combined and applied, excellent herbicidal effect is obtained compared to each application alone, that is, in the rice paddy, rice is used as a single chemical dispersion. It does not adversely affect at all, and substantially inhibits the growth of all harmful weeds such as bark, tadpoles, water canes, snares and beetles, and also requires weeding after drug spread. Long lasting weed suppression effect It found that has a practical effect wanted for a long time waiting for, and have completed the present invention.

The first invention of the present application is the following general formula

[Wherein, R ₁ is a hydrogen atom or a methyl group, and R ₂ is

기(

은 0 또는 1임)]으로 표시되는 피라졸계 화합물 적어도 1종 및 3, 7-디클로로-8-퀴놀린카르복실산을 유효성분으로서 함유하는 것을 특징으로 하는 제초 조성물이고, 본 원의 제2발명은 상기 제1발명의 제초 조성물에 N-(α, α-디메틸벤질)-α-브로모-tert-부틸아세트아미드, 3-이소프로필-2, 1, 3-벤조티아디아지논-(4)-2, 2-디옥시드 또는 그의 나트륨염으로 이루어진 군에서 선택된 1종의 화합물을 유효성분으로 첨가하는 것을 특징으로 하는 제초 조성물이다.

group(

Is 0 or 1), and is a herbicidal composition comprising at least one pyrazole-based compound and 3, 7-dichloro-8-quinolinecarboxylic acid as an active ingredient. In the herbicidal composition of the first invention, N- (α, α-dimethylbenzyl) -α-bromo-tert-butylacetamide, 3-isopropyl-2, 1, 3-benzothiadiazinone- (4)- It is a herbicidal composition characterized by adding one compound selected from the group consisting of 2, 2-oxide or its sodium salt as an active ingredient.

Representative examples of the active ingredient according to the present invention are described below.

Compound No. A-1: 1,3-dimethyl-4- (2, 4-dichlorobenzoyl) -5-phenacyloxypyrazole

Compound No. A-2: 1, 3-dimethyl-4- (2, 4-dichlorobenzoyl) -5- (4-methylfernasiloxy) pyrazole

Compound No. B: 3, 7-dichloro-8-quinolinecarboxylic acid

Compound No. C: N- (α, α-dimethylbenzyl) -α-bromo-tert-butylacetamide

Compound No. D-1: 3-Isopropyl-2, 1, 3-benzothiadiazinone- (4) -2, 2-dioxide

Compound No. D-2: 3-Isopropyl-2, 1, 3-benzothiadiazinone- (4) -2, 2-dioxide sodium salt

The practical compounding weight ratios of the active ingredients A, B, C, and D according to the present invention are A: B = 2-20: 0.1-5, preferably 5-10, when expressed by the ratio in 100 parts by weight of the formulation. : 0.5-2, A: B: C = 2-20: 0.1-5: 2-20, preferably 5-10: 0.5-2: 4-10, A: B: D = 2-20 : 0.1-5: 2-20, preferably 5-10: 0.5-2: 5-10.

The preferred dosage of the preparation of the present invention will vary depending on weather conditions, soil conditions, the type of preparation of the medicament, the time of application, the method of application, and the like, but in general, the total effective amount per argan is 6.0-150 g, preferably 15- 70 g. The suitable application time of the herbicidal composition of the present invention is between the weed generator and the 4-leaf stage, and in the case of transplant discussion, it is generally between the rice transplantation and the 20 days after transplantation.

In addition, in the application of the herbicidal composition of the present invention, the active ingredients A, B, C and D are blended with various auxiliaries according to the conventional pesticide preparation method, for example, formulations in the form of emulsions, hydrating agents, granules and the like. However, the active ingredients may be mixed and formulated together or separately formulated separately.

As an adjuvant to be used for the preparation, solid carriers such as diatomaceous earth, slaked lime, calcium carbonate, talc, white carbon, talc, kaolin, bentonite, zircite, clay, and starch; Solvents such as water, toluene, xylene, solvent naphtha, dioxane, acetone, isophorone, methyl isobutyl ketone, chlorobenzene, cyclohexane, dimethyl sulfoxide, dimethylformamide, N-methyl-2-pyrrolidone, and alcohols ; Alkyl sodium sulfate, sodium alkylbenzene sulfonic acid, sodium lignyl sulfonic acid, polyoxyethylene glycol alkyl ether, polyoxyethylene lauryl ether, polyoxyethylene alkylaryl ether, polyoxyethylene fatty acid ester, polyoxyethylene sorbitan fatty acid ester Electrodeposition agents, such as; Although surfactant etc. are enumerated, the said adjuvant is not limited to this, of course.

Next, a plant test example of the herbicidal composition of the present invention will be described.

Test Example

Fill the rice paddy soil in a pot of 1 / 10,000 algae, sowing seeds or tubers of bark, tadpoles, water squirrels, snares and beetles, or planting a lot in one place, fresh water Growing under conditions. When each grass seed reached the predetermined leaf period, each active ingredient was treated dropwise with a fiat as a suspension of a predetermined amount of a hydrating agent (a mixture is mixed as appropriate) as a suspension in accordance with the later formulation example 4. After 4 weeks of treatment, the remaining weeds were pulled and the air dry weight was measured, and the percentage of the untreated zone was expressed as the growth inhibition degree according to the following herbicidal labeling criteria. The result of Table 2-1 was obtained.

Herbicide Effect Criteria

Survival rate of less than 10 weeds 10% or less Survival rate 51-60% of 5 weeds

9 Remaining rate of weeds 11-20% Remaining rate of 4 weeds 61-70%

8 Weeding Survival Rate 21-30% 3 Weeding Survival Rate 71-80%

7 Weeding Survival Rate 31-40% 2 Weeding Survival Rate 81-90%

Survival Rate of 6 Weeds 41-50% Survival Rate of 1 Weeds 91-100%

Table 1-1

Next, the compounding example of the manufacturing composition of this invention is described.

Formulation Example 1

(1) 8 parts by weight of compound number A-1

(2) 0.7 parts by weight of compound number B

(3) 20 parts by weight of bentonite

(4) 1.5 parts by weight of a mixture of alkylarylsulfonate and polyoxyethylene alkylarylethersulfate

[Product name: Solfool 5146, Toho Kagaku Kogyo Kabuki Kiisha Co., Ltd.]

(5) 2 parts by weight of calcium lignin sulfonate 50% aqueous solution

[Product Name: Sanekisu C, Sanyo Kokusaku Pulp, Kabushiki Kaisha Co., Ltd.]

(6) 68.8 parts by weight of granular calcium carbonate

The granules were obtained by mixing and pulverizing each component of the above (1)-(6), adding the required quantity of granulation water, extrusion granulating, and extruding granulation.

Formulation Example 2

(1) 7 parts by weight of compound number A-1

(2) 0.7 parts by weight of compound number B

(3) Compound No. C 5 parts by weight

(4) mixtures of alkylarylsulfonates and polyoxyethylene alkylarylethersulfates

6 parts by weight

[Product name: Solfool 5146, Toho Kagaku Kogyo Kabushiki Kaisha]

(5) 2 parts by weight of polyoxyethylene octylphenyl ether

[Product name: Neugen EA-112, Daiichigo Gyo Seiyaku Kabushiki Kaisha Co., Ltd.]

(6) Zicklite 25 parts by weight

(7) 54.3 parts by weight of bentonite

The granules were obtained by mixing and pulverizing each component of the above (1)-(7), and adding an appropriate quantity of granulation required and carrying out extrusion granulation.

Formulation Example 3

(1) 6 parts by weight of compound number A-1

(2) 1 part by weight of compound number B

(3) 12 parts by weight of compound number D-1 (50% aqueous solution)

(4) 25 parts by weight of Zicklite

(5) mixtures of alkylarylsulfonates and polyoxyethylene alkylarylethersulfates

6 parts by weight

(Product name: Solfool 5146, Toho Kagaku Kogyo Kabuki Kaisha)

(6) 2 parts by weight of polyoxyethylene octylphenyl ether

(Product name: Neugen EA-112, Daiichi Gogyo Seiyaku Kabushiki Kaisha)

(7) Bentonite 54 parts by weight

Each granule of (1)-(7) mentioned above was mixed and grind | pulverized, and granulation was obtained by adding an appropriate quantity of granulation water, and extruding granulation.

Formulation Example 4

(1) 10 parts by weight of compound number A, B, C or D

(2) 8 parts by weight of hydrous amorphous silicon dioxide

[Product Name: Couple Rex SO, Shionogi Seiyaku Kabushiki Kaisha Co., Ltd.]

(3) 4 parts by weight of polyoxyethylene alkylaryl ether sulfate

(Product Name: Solfool 5039, Toho Chemical Co., Ltd.)

(4) 1 part by weight of naphthalin sulfonic acid soda formalin condensate

(Product name: Laberine FA-N, Daiichi Goyogo Seiyaku Kabuki Kaisha)

(5) Zicklite 77 parts by weight

Each component of above (1)-(5) was mixed and grind | pulverized and the hydration agent was obtained.

Claims (2)

A herbicidal composition comprising at least one pyrazole compound of the following general formula and 3,7-dichloro-8-quinolinecarboxylic acid as an active ingredient.

Wherein R ₁ is a hydrogen atom or a methyl group, R ₂ is

(

Is 0 or 1). As an active ingredient, at least one pyrazole compound of the following general formula, 3, 7-dichloro-8-quinolinecarboxylic acid, and N- (α, α-dimethylbenzyl) -α-bromo-tert-butylacetamide , 3-isopropyl-2, 1, 3-benzoniadiazinone- (4) -2, 2, -dioxide and at least one compound selected from the group consisting of sodium salts thereof .

Wherein R ₁ is a hydrogen atom or a methyl group, R ₂ is

(

Is 0 or 1).