JPS5989605A - Herbicidal composition - Google Patents

Abstract

PURPOSE:A herbicidal composition exhibiting improved synergistic effect on broad-leaved weeds and narrow-leaved weeds in land cultivating crops, especially soybeans, etc., showing no phytotoxicity on crops such as soybeans, etc., containing an active ingredient obtained by blending a novel compound with metribuzin [i.e. 4-amino-6-t-butyl-3-methylthio-1,2,4-triazin-5(4th)-one]. CONSTITUTION:1pt.wt. N-t-butyl-3-methyl-4-trifluoromethanesulfonamido-benzenesulfonamide shown by the formula, a novel substance having herbicidal effect, is blended with 0.02-10pts.wt. metribuzin, to give an active ingredient. The blend is mixed with a carrier, or an auxiliary, and manufactured into preparations such as emulsion, wettable powder, granule, suspension, etc. 5-40g/a active ingredient is used for bifoliate plants such as China jute, cocklebur, etc. and monocotyledonous plants such as barnyard grass, nutgrass, etc.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is described as Nt-butyl-3-methyl-4-trifluoromethanesulfonamide-benzenesulfonamide (hereinafter referred to as compound CI) represented by the formula. ) and 4-amino-6-t-butyl-3-methylthio-1,2,4-1 riazine-5 (
4) It relates to a herbicide (hereinafter referred to as the composition of the present invention) containing 1)-one (1) (hereinafter referred to as metribuzin) as an active ingredient.

Currently, a large number of herbicides are used as herbicides for upland fields, but since there are many types of weeds to control and they occur over many seasons, they are more effective and have a wide spectrum of weeds. There is a need for safe herbicides for crops.

Metribuzin is a compound widely used as a herbicide (The Pe5ticide Manua
lSixth Edition P, 362 (1
979)).

Compound [I] (Japanese Patent Application No. 56-125447) is a new compound having herbicidal activity discovered by the present inventors.

As a result of various studies, the present inventors found that the compound CI)
By using the composition of the present invention containing metribuzin and metribuzin as active ingredients, it is possible to sufficiently control broad-leaved weeds and narrow-leaved weeds, especially broad-leaved weeds, in cultivation areas such as major crops, especially soybean, and the control effect is also high. We have found that when these compounds are used alone (2), they increase synergistically and do not cause any problematic phytotoxicity to major crops such as soybeans,
The invention has been completed.

Although the content ratio of compound [I] and metribuzin, which are the active ingredients of the composition of the present invention, can be varied over a relatively wide range, it is usually 0.02 to 10 parts by weight of metribuzin per 1 part by weight of compound (I). , preferably from 0.1 to
2 parts by weight.

The composition of the present invention exhibits excellent herbicidal efficacy against many broad-leaved weeds and narrow-leaved weeds, and does not cause any problematic phytotoxicity to major crops. Targeted weeds include whiteweed, blueberry, Japanese knotweed, chickweed, purslane, Japanese fir tree,
Morning glories, such as morning glories, Japanese morning glories, and Malva morning glories, dicotyledonous plants such as American hornwort, American golden deer, physalis, pigweed, and wild sunflowers;
Ohishiba, Japanese barnyard grass, Seiban sorghum, Japanese sorghum, Cyp
Examples include monocotyledonous plants such as Erus esculen--92-.

(3) When the composition of the present invention is used as a herbicide, it is usually mixed with a solid carrier, liquid carrier, surfactant, or other formulation auxiliary to form an emulsion, wettable powder, suspension, granule, etc. Formulated into.

These preparations contain compound [I] and metribuzin as active ingredients in a weight ratio of 1 to 95%, preferably 5 to 80%.
contains.

Solid carriers include fine powders or granules such as kaolin clay, attapulgite clay, bentonite, acid clay, pyrophyllite, talc, diatomaceous earth, calcite, walnut powder, urea, ammonium sulfate, and synthetic hydrous silicon oxide. are aromatic hydrocarbons such as xylene and methylnaphthalene, alcohols such as Impropatol, ethylene glycol, and cellosolve, ketones such as acetone, cyclohexanone, and inholone, vegetable oils such as soybean oil and cottonseed oil, dimethyl sulfoxide, acetonitrile, There is water etc.

Surfactants used for emulsification, dispersion, wet carbonization, etc. include alkyl sulfate ester salts, alkyl (aryl) sulfonates, dialkyl sulfosuccinates, and polyoxyethylene alkylaryl ether phosphates. Anionic surfactants such as salts, nonionic surfactants such as polyoxyethylene alkyl ether, polyoxyethylene alkylaryl ether, polyoxyethylene polyoxypropylene block copolymer, nrubitan fatty acid ester, polyoxyethylene nrubitan fatty acid ester, etc. etc. Formulation auxiliaries 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 35 parts of Compound (I), 15 parts of metribuzin, 3 parts of calcium ligninsulfonate, 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 (5) 136 parts of the compound, 3 parts of metribuzin, 14 parts of polyoxyethylene styrylphenyl ether, 6 parts of calcium dodecylbenzenesulfonate, and 71 parts of xylene are thoroughly mixed to obtain an emulsion.

Formulation Example 3 Compound (31.5 parts of I, 0.5 parts of metribuzin, 1 part of synthetic hydrous silicon oxide, 2 parts of calcium ligninsulfonate,
30 parts of bentonite and 65 parts of kaolin clay are thoroughly ground and mixed (17), water is added, and the mixture is thoroughly kneaded, followed by granulation and drying to obtain granules.

Formulation Example 4 20 parts of compound (I), 5 parts of metribuzin, 1.3 parts of polyoxyethylene rubitan monooleate, 3 parts of CMC,
A suspension is obtained by mixing 69 parts of water and wet milling until the particle size of the active ingredient is less than 5 microns.

These preparations can be used as is or diluted with water, etc., and treated with foliage or soil. - Soil (6) For treatment, spray the preparation 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, mixing ratio of active ingredients, type of target weeds and crops, etc., but in general, the total amount of the compound (I3 and metribuzin) is 5 to 5% per are. 407, preferably 10-30
F, emulsions, wettable powders, suspensions, etc. are diluted with 1 to 10 liters of water per are (if necessary, a spreading aid such as a spreading agent is added) and applied. Granules etc. are applied as is without any dilution.

In addition to the above-mentioned surfactants, spreading agents include polyt-t-diethylene resin acid (ester), likunin (7) sulfonate, abietate, dinaphthylmethane disulfonate, parabuin, and the like.

Next, the deodorizing effect of the composition of the present invention will be specifically explained with reference to test examples.

The herbicidal efficacy was determined by measuring the fresh weight of the above-ground parts of the test plants that remained dead at the time of the survey, calculating the growth inhibition rate (%) using the following formula, and showing the result as a numerical value.

Test Example 1 Upland Soil Treatment Test A cylindrical plastic pot with a diameter of 101 mm and a depth of 100 mm was filled with upland soil, and the potted field soil was sown and covered with soil.

The composition of the present invention, made into a wettable powder according to Formulation Example 1, was diluted with 10 liters of water per are, and a predetermined amount of the composition was sprayed onto the soil surface using a small sprayer.

The plants were grown in a greenhouse for 20 days after spraying, and their herbicidal efficacy was investigated. The results are shown in Table 1.

(8) Table 1 Test Example 2 Upland Soil Treatment Test A vat with an area of 33 x 23 n2 and a depth of 1101 cm was filled with upland soil, and sowed with Japanese barnyard grass, Japanese staghorn, red-winged deer, Japanese fir tree, Japanese commonweed, and soybean to a thickness of 1 to 21 mm. It was covered with soil. The composition of the present invention made into an emulsion according to Formulation Example 2 was diluted with water equivalent to 10 liters per are, and a predetermined amount of the diluted solution was sprayed onto the soil surface using a small sprayer.

After spraying, the plants were grown in a greenhouse for 20 days and their herbicidal efficacy was investigated.

The results are shown in Table 2.

Table 2 Procedural amendment (method) L Indication of the case 1982 Patent Application No. 200868 2, Title of invention Herbicidal composition 3, Person making the amendment Relationship to the case Patent applicant address 5-chome, Kitahama, Higashi-ku, Osaka Address 15 name (
209) Sumitomo Chemical Co., Ltd. Representative Hijikata
Take 4, Agent Address: 5, Sumitomo Chemical Co., Ltd., 5-15 Kitahama, Higashi-ku, Osaka, Japan Date of amendment order: February 22, 1981 6: Full text of the amended specification for Europe - 66=

Claims (1)

[Claims] Nl-butyl-3-methyl-4-trifluoromethanesulfonamide-benzenesulfonamide and 4-amino-
A herbicidal composition comprising 6-t-butyl-3-methylthio-1,2,4-triazin-5(4H)-one as an active ingredient.