JPS61194003A - Herbicidal composition - Google Patents

Abstract

PURPOSE:A herbicidal composition capable of weeding selectively various weeds, especially weeds such as China jute, etc., which are difficult to weed in maize fields, by synergistic action with a small amount, comprising a mixture of a specific compound and an S-triazine derivative as an active ingredient. CONSTITUTION:A herbicidal composition comprising 2-(4-chloro-5- cyclopentyloxycarbonylmethylthio-2-fluorophenyl)-4, 5, 6, 7-tetrahydro-2H-insoin dole-1,3-dione shown by the formula I having herbicidal effects and an S-triazine derivative shown by the formula II (X is H, cyano)(atrazine when X is H, and cyanozine when X is cyano) as active ingredients. The blending ratio is 0.1-50 pts.wt. compound shown by the formula II based on 1pt.wt. compound shown by the formula I. The active ingredients are blended with a carrier or an auxilia ry, processed into preparation suc hash emulsion, wettable powder, suspension, granule, etc. The mount of the active ingredients in the preparation is 0.5-90wt% by weight ratio.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides 2-(4-chloro-5-cyclopentyloxycarbonylmethylthio-2-fluorophenyl)-4
,5,6,7-tetrahydro-2H-isoindole-
1,8-dione [hereinafter referred to as a compound (hereinafter referred to as Ri)] and a general formula [in the formula, X represents a hydrogen atom or a cyano group] II-) riazine derivative (hereinafter referred to as atrazine or cyanazine) The present invention is aimed at a herbicidal composition (hereinafter referred to as the composition of the present invention) containing as an active ingredient.

Currently, many herbicides are used as herbicides for upland fields, but because there are many types of weeds to control and they occur over a long period of time, they are more effective at killing weeds and have a wider herbicidal spectrum. There is a need for safe herbicides for crops.

As a result of various studies aimed at developing a herbicide that meets these objectives, the present inventors have found that the composition of the present invention containing a compound (atrazine or cyanazine) as an active ingredient is effective against various weeds, especially They can selectively kill a wide range of weeds in corn fields, and their herbicidal effects are synergistically enhanced compared to when they are used alone.
The present invention was completed by discovering that it can be applied at a low i content of 4%.

The weeds targeted by the composition of the present invention include foxtail grass, sorghum grass, sorghum grass, grasshopper, and sorghum.
Examples of these include foster plants such as grasshopper, morning glories such as whitewort, blueberry, purslane, ona fir, whitetail, morning glory such as Japanese morning glory, Ichibi, and marpa morningglory, and dicotyledonous plants such as American hornwort, American goldfish, dogfish, wild sunflower, and the like.

The composition of the present invention can simultaneously weed weeds that are particularly difficult to weed, such as morning glories such as Aspergillus vulgare, red-winged deer, Physalis, Japanese commonweed, and Japanese blueberry.

Compound (■) (Japanese Unexamined Patent Publication No. 59-212472) is
It has herbicidal effect and also contains atrazine and cyanana :/ (
Aerobicide 44andbook of th
e Weed8science 8ociety or
America, Fifth EditionP
8G and P, 119 (1988)) are known as herbicides.

The mixing ratio of compound (1), which is an active ingredient of the composition of the present invention, and atrazine or cyanazine can be varied over a relatively wide range, but usually, atrazine or cyanazine is added to 1 part by weight of compound (I). , 0.1 to 50 parts by weight, preferably 0.5 to 20 parts by weight.

The chemical structural formulas of the compounds (ritoatrazine and cyanazine) are shown in Table 1.

Table 1 When using the composition of the present invention as a herbicide, it is usually formulated into emulsions, wettable powders, suspensions, granules, etc. using solid carriers, liquid carriers, surfactants, and other formulation auxiliaries. Formulate.

These preparations contain active ingredients in a proportion of 0.5 to 90% by weight.
, preferably 2 to 80%. .

Solid carriers include kaolin clay, attapulgite clay, bentonite, acid clay, pyrophyllite,
Examples include fine powders or granules such as talc, diatom, calcite, walnut powder, urea, ammonium sulfate, and synthetic hydrous silicon oxide.As liquid carriers, aromatic hydrocarbons such as xylene and methylnaphthalene, isopropanol, Examples include alcohols such as ethylene precol and cellosolve, ketones such as acetone, cyclohexanone and isophorone, vegetable oils such as soybean oil and cottonseed oil, dimethyl sulfoxide, acetonitrile, and water.

Surfactants used for emulsification, dispersion, wet spreading, etc. include alkyl sulfate salts, alkyl (aryl)
Anionic surfactants such as sulfonates, dialkyl sulfosuccinates, polyoxyethylene alkylaryl ether phosphate salts, polyoxyethylene alkyl ethers, polyoxyethylene alkylaryl ethers, polyoxyethylene polyoxypropylene blow!
Examples include nonionic surfactants such as wolfberry copolymer, sorbitan fatty acid ester, and polyoxyethylene sorbitan fatty acid ester. Adjuvants for formulation include lignin sulfonate, alginate, polyvinyl alcohol,
Gum arabic, CMC (carboxymethyl cellulose)
, PAP (isopropyl acid phosphate), and the like.

Examples of formulations are shown below. Note that parts indicate parts by weight.

Formulation Example 1 10 parts of Compound (1), 40 parts of atrazine, 8 parts of calcium lignosulfonate, 2 parts of sodium lauryl sulfate, and 45 parts of synthetic hydrous silicon oxide are thoroughly ground and mixed to obtain a wettable powder.

Formulation Example 2 4 parts of Compound (I), 2 parts of cyanazine, 14 parts of polyoxyethylene styrylphenyl ether, 6 parts of calcium dodecylbenzenesulfonate, 84 parts of xylene and 40 parts of isophorone are thoroughly mixed to obtain an emulsion. Formulation Example 8 Compound (1) 0.5 parts, cyanazine 1-5 parts, synthetic hydrated silicon oxide 1 part, calcium ligninsulfonate 2 parts,
Take 80 parts of bentonite and 65 parts of kaolin clay (
After pulverizing and mixing, adding water and kneading well, the mixture is granulated and dried to obtain granules.

These preparations can be used as they are or diluted with water, etc. for foliage treatment or soil destruction treatment. For soil treatment, the formulation is either spread on the soil surface (if necessary, mixed with the soil after application) or irrigated into the soil.

Furthermore, by mixing it with other herbicides, it can be expected to increase the herbicidal efficacy. Furthermore, it can be used in combination with insecticides, acaricides, nematicides, fungicides, plant growth regulators, fertilizers, soil conditioners, and the like.

The application amount of the composition of the present invention varies depending on weather conditions, soil conditions, formulation form of the composition, mixing ratio of active ingredients, target weeds and crops, etc., but usually the total amount of active ingredients per are is 1 to 25 f. be.

Emulsions, wettable powders, suspension agents, etc. usually contain 1 s/are.
- Dilute with 10 liters of water (if necessary, add a spreading agent such as a spreading agent) and apply.
It is usually applied as is without any dilution.

In addition to the above-mentioned surfactants, the spreading agents include preoxyethylene resin acid (ester), lignin sulfonate,
Examples include abietate, dinaphthylmethane disulfonate, and paraffin.

Next, test examples will be given to specifically demonstrate the herbicidal effects of the composition of the present invention. The active ingredients of the composition of the present invention are shown by the compound names in Table 1, and the compounds used for comparison are shown in Table 2.
It is shown in the compound composition in the table.

In addition, the herbicidal efficacy is the growth inhibition rate (%) calculated by the following formula by weighing the fresh weight of the above-ground parts of the test plants that remained withered at the time of the survey.
Indicated by

Table 2 Test Examples Area: 88 x 28 cJ, depth: 11 A country vat was filled with field soil and sown with Marpa morning glory, Japanese fir tree, American goldenrod, Japanese velvet, Japanese staghorn, and corn [grown for 7 and 18 days]. Thereafter, a predetermined amount of the composition of the present invention made into a wettable powder according to Formulation Example 1 was diluted with water containing a spreading agent, and sprayed from above the plant with a small sprayer at a rate of 5 liters per are. Sprayed evenly over the entire stem and leaves.

At this time, the growth of each plant varied depending on the grass suppression, but was at the 1-4 leaf stage.

The herbicidal efficacy was investigated 20 days after spraying. The results are shown in Table 8. This test was conducted outdoors throughout the entire period.

Table 8 Amendment of Efficacy Procedures for Various Weeds (Voluntary) Mr. Michibe Uga, Commissioner of the Patent Office, July 73, 1985;
1. Indication of the case 1985 Patent Application No. 85174 2. Name of the invention Herbicidal composition 8. Person making the amendment Relationship to the case Patent applicant address 5-15 Kitahama, Higashi-ku, Osaka Name (20
9) Hijikata, Representative of Sumitomo Chemical Industries, Ltd.
Take 4, Agent address: Sumitomo Chemical Co., Ltd., 5-15 Kitahama, Higashi-ku, Osaka City Column 6 of the detailed description of the invention in the specification, Contents of amendment (1) Compounds in Table 1, page 5 of the specification ( Regarding the chemical structural formula of 1), correct it to read ".

that's all

Claims (1)

[Claims] 2-(4-chloro-5-cyclopentyloxycarbonylmethylthio-2-fluorophenyl)-4,5,6,
7-tetrahydro-2H-isoindole-1,3-dione and general formula ▲ Numerical formulas, chemical formulas, tables, etc. are available ▼ [In the formula, X represents a hydrogen atom or a cyano group. ] A herbicidal composition comprising an s-triazine derivative represented by the following as an active ingredient.