JPS61100503A - Herbicidal composition - Google Patents

Abstract

PURPOSE:A herbicidal composition capable of controlling selectively a wide range of weeds especially in peanut and soybean fields, showing synergistically improved herbicidal effects with a smaller amount of herbicide than a single use, comprising a specific compound and FURUAZIHOPU-butyl as active ingredients. CONSTITUTION:A herbicide comprising 2-(4-chloro-5-cyclopentyloxy-carbonyl methylthio-2-fluor-ophe-nyl)-4, 5, 6, 7-tetrahydro-2H-isoindole-1, 3-dithione shown by the formula I having herbicidal effect and FURUAZIHOPU-butyl {=butyl 2-[4-(5-trifluoromethyl-2-pyridinyl oxy) phenoxy] propionic acid} shown by the formula II well-known as a herbicide, as active ingredients. The blending ratio is 0.1-50pts.wt. compound shown by the formula II based on 1pt.wt. compound shown by the formula I. Capable of weeding simultaneously weeds especially difficult to control, such as green foxtail, SEIBANMOROKOSHI, common nightshade, China jute, spleen amaranth, etc.

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 compound [1]) and butyl 2-(4-(5-trifluoromethyl-2-pyridinyloxy)) The present invention relates to a herbicidal composition containing phenoxypropionic acid (hereinafter referred to as fluazifop-butyl) 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 to develop a herbicide that meets these objectives, the present inventors found that the composition of the present invention containing compound 11) and fluazifop-butyl as active ingredients:
It has been shown that various weeds, especially a wide range of weeds in groundnut and soybean fields, can be selectively weeded out, and the herbicidal effect is synergistically increased compared to when they are used alone, and they can be applied at lower doses. Heading, the invention was completed.

The weeds targeted by the herbicidal composition of the present invention include monocotyledonous plants such as foxtail grass, sorghum, sorghum, sorghum, and wheat; There are morning glories such as morning glory, dicotyledonous plants such as American hornwort, American goldenrod, dogfish, and wild sunflower.

The herbicidal composition of the present invention can simultaneously weed weeds that are particularly difficult to weed, such as weeds such as sorghum, hackberry, Physalis, Japanese sorghum, and staghorn.

Compound [1] (Japanese Patent Application No. 58-86213) has a herbicidal effect, and fluazifop-butyl (Short
Review of Herbicides, 4th
edition.

Hodogaya Chemical Co., Lt.
(1982)] is known as a herbicide.

The mixing ratio of the compound [I], which is an active ingredient of the herbicidal composition of the present invention, and fluazifop-butyl can be varied over a relatively wide range, but it is usually 0.00% fluazifop-butyl per 101 parts by weight of the compound [101 parts by weight]. The amount is 1 to 50 M parts, preferably 0.5 to 20 parts by weight.

The chemical structural formulas of compound (1) and fluazifop-butyl are shown in Table 1.

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

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, diatomaceous earth, calcite, walnut powder, urea, ammonium sulfate, and synthetic hydrated silicon oxide. Liquid carriers include aromatic hydrocarbons such as xylene and methylnaphthalene, isopropanol, and ethylene glycol. , alcohols such as cellosolve, ketones such as acetone, cyclohexanone, and isohorn, vegetable oils such as soybean oil and cottonseed oil, dimethyl sulfoxide, acetonitrile, and water.

Surfactants used for emulsification, dispersion, wet layer, etc. include alkyl sulfate salts, alkyl (aryl)
Anionic surfactants such as sulfonates, dialkyl sulfosuccinates, polyoxyethylene alkylaryl ether phosphate ester salts, polyoxyethylene alkyl ethers, polyoxyethylene alkylaryl ethers, polyoxyethylene polyoxypropylene block copolymers, Examples include nonionic surfactants such as 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 20 parts of compound CI), 30 parts of fluazifop-butyl, 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 Compound [1 part 5 parts, fluazifop-butyl 20 parts, polyoxyethylene sorbitan monooleate 3 parts, CM
Part Ca and 69 parts of water are mixed and wet milled until the particle size is less than 5 microns to obtain a suspension.

These preparations can be used as they are or diluted with water, etc., to treat grass leaves.

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 herbicidal composition of the present invention depends on weather conditions, soil conditions,
Although it varies depending on the formulation form of the composition, the mixing ratio of active ingredients, the target weeds and crops, etc., the amount of active ingredients per are is usually 0.1 to 20 g.

Emulsions, wettable powders, suspensions, etc. are usually diluted with 1 liter to 10 liters of water per are (if necessary, a spreading aid such as a spreading agent is added) and applied. is usually applied as is without any dilution.

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

Next, test examples will be given to specifically demonstrate the herbicidal efficacy of the herbicidal composition of the present invention. The herbicidal efficacy is expressed as the growth inhibition rate (%) calculated by the following formula by measuring the fresh weight of the above-ground parts of the test plants that remained dead at the time of the survey.

Test Example 1 Concrete pots with an area of 40 x 85 d and a depth of 35 α were filled with field soil, and green foxtail, Seiban sorghum,
Japanese Physalis, Japanese radish, Japanese cabbage, and groundnut were seeded into mochi seeds and grown for 15 days. Thereafter, the test material was made into a hydrating powder according to Formulation Example 1, a predetermined amount of the powder was diluted with water containing a spreading agent, and sprayed onto the stems and leaves from above the plant using a small sprayer at a rate of 5 liters per are. Spread evenly over the entire surface.

At this time, the growth of each plant differs depending on the grass growth, but it is 1.5 to
It was at the four-leaf stage. The herbicidal efficacy was investigated 21 days after spraying.

The results are shown in Table 2. Note that this test was conducted outdoors throughout the entire period.

Table 2 Written amendment for efficacy procedures against various weeds (voluntary) 6゜February 7, 1965 1. Indication of the case 1982 Patent Fragment No. 221429 2. Name of the invention Herbicidal composition 3. Person making the amendment Case and Relationship Patent applicant address 5-15 Kitahama, Higashi-ku, Osaka Name (2
09) Sumitomo Chemical Co., Ltd. Representative Hijikata
Take 4, Agent address: 5-15 Kitahama, Higashi-ku, Osaka +0612
20-3404 5. Subject of amendment: In the denominator of the growth suppression rate calculation formula on page 8, line 7 of the specification of contents of amendment:
Correct "production volume" to "fresh weight."

January 13, 1985 Michibe Uga, Commissioner of the Patent Office, R.), 31.
Display of the incident 1982 Patent E! AfN 221429 f)
2. Name of the invention: Herbicidal composition 8. Relationship with the case of the person making the amendment 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., 5-15-5 Kitahama, Higashi-ku, Osaka ゛Contents of amendment (1) The following is added after the bottom line of page 10 of the specification.

1゛Test 2 Concrete pots with an area of 40 x 16 cd and a depth of 853 cm were filled with field soil, and Seiban sorghum, Japanese sorghum, Japanese soybean, and soybean were sown and grown for 15 days. Thereafter, the sample was made into a wettable powder according to Formulation Example 11c, and a predetermined amount of the powder was diluted with water containing a spreading agent.
The heat ζ was uniformly sprayed over the entire stem and leaves using a small sprayer from above the plant at the rate of a little spraying. At this time, the growth of each plant varied depending on the plant, but was at the 1-8 leaf stage. The herbicidal efficacy was investigated 20 days after spraying. The results are shown in Table 8. Nasai 6 and Book 8a were held outdoors for the entire period.

Table 8: Efficacy against various weeds that's all

Claims (1)

[Claims] 2-(4-chloro-5-cyclopentyloxycarbonylmethylthio-2-fluorophenyl)-4,5,6,
7-tetrahydro-2H-isoindole-1,3-dione and butyl 2-[4-(5-trifluoromethyl-
A herbicidal composition comprising 2-pyridinyloxy)phenoxypropionic acid as an active ingredient.