JPS63185905A - Herbicidal composition - Google Patents

Abstract

PURPOSE:To obtain a herbicidal composition effective in selectively controlling wide variety of weeds in crop field in synergistically increased herbicidal activity, by using a tetrahydrophthalimide derivative and triallate or diallate. CONSTITUTION:The objective composition contains, as active components, (A) a tetrahydrophthalimide derivative of formula (R is methyl or H) and (B) S-2,3,3- trichloroallyl-N,N-diisopropylthiol carbamate (triallate) or S-2,3-dichloroallyl-N,N- diisopropylthiol carbamate (diallate). The composition is usually mixed with a carrier, a surfactant and a preparation adjuvant in use and used in the form of emulsifiable concentrate, wettable powder, etc. the amount of the component B is 0.1-1,000pts.wt., preferably 1-700pts.wt. per 1pt.wt. of the component A. The composition has extended herbicidal spectrum.

Description

Detailed Description of the Invention The present invention provides a tetrahydrophthalimide derivative represented by the general formula (1) [wherein R represents a methyl group or a hydrogen atom], and a tetrahydrophthalimide derivative represented by S-2
，! 3.8-Trichloroaryl N,N-diisopropylthiol carbamate (hereinafter referred to as trialate).

) or S-2,8-dichloroallyl-N,N-diisopropylthiol carbamate (hereinafter referred to as dialate) as an active ingredient (hereinafter referred to as the composition of the present invention). It is.

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 have developed a composition of the present invention containing a tetrahydrophthalimide derivative ("l) and trialate or dialate as active ingredients. are various weeds,
In particular, it can selectively weed a wide range of weeds in grain fields such as wheat and barley, and its herbicidal efficacy increases synergistically compared to when they are used alone, and they can be applied at low dosages. Discovered that the herbicidal spectrum was expanded,
The invention has been completed.

Weeds targeted by the composition of the present invention include monocotyledonous plants such as sycamore, oat, sycamore, hackberry, and cypress; Dicotyledonous plants such as , forget-me-not, hartade, snail knotweed, freckle currant, bindweed, whiteberry, sagebrush, and Physalis can be mentioned.

The composition of the present invention can simultaneously weed weeds that are particularly difficult to weed, such as weeds such as commonweed, chickweed, commonweed, commonweed, violet, hartetoderma, forget-me-not, sopacific vine, white-bellied weed, black-and-white weed, oat, and black-and-white weed.

Tetrahydrophthalimide derivative [I] (European Patent No. 6
No. 1741) has herbicidal efficacy, and trialate and diarate [CoRoWorthing et al., eds.
The Pe5ticide Manual 7th Edition 5th
41 pages, 169 pages (1988) TheBriti
sh Crop Protection Council
1 publication], the mixing ratio of the tetrahydrophthalimide derivative [I], which is an active ingredient of the composition of the present invention, which is known as a herbicide, and trialate or dialate can be varied within a relatively wide range. , usually 0.1 to 100 of doryalate or dialylate per 1 part by weight of tetrahydrophthalimide derivative [I].
0 parts by weight, preferably 1 to 700i1111 parts.

Table 1 shows the chemical structural formulas of the individual compounds of the tetrahydrophthalimide derivative [■] and the trialate and dialate.

Table 1 The composition of the present invention is usually mixed with solid carriers, liquid carriers, surfactants and other formulation auxiliaries to form emulsions, wettable powders, suspensions, etc.
It is formulated into powders, granules, etc.

Examples of 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. Liquid carriers include aromatic hydrocarbons such as xylene and methylnaphthalene, alcohols such as isopropanol, ethylene glycol, and cellosolve, ketones such as acetone, cyclohexanone, and isophorone, vegetable oils such as soybean oil and cottonseed oil, and dimethyl sulfoxide. , acetonitrile, water, etc. Examples of surfactants used for solidifying, dispersing, and moistening layers include anionic surfactants such as alkyl sulfate salts, alkylaryl sulfonates, dialkyl sulfosuccinates, and polyoxyethylene alkylaryl ether phosphate salts. Activator, polyoxyethylene alkyl ether, polyoxyethylene alkylaryl ether, polyoxyethylene polyoxypropylene block copolymer, sorbitan 8M
Examples include nonionic surfactants such as fatty acid esters and polyoxyethylene sorbitan fatty acid esters. Examples of 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 the part indicates the tt part.

Formulation Example 1 0.5 parts of compound (1), 80 parts of trialate, 10 parts of synthetic hydrous silicon oxide, 8 parts of alkyl sulfate, 2 parts of calcium lignosulfonate, and ±54.5 parts of diatoms were thoroughly ground and mixed, and mixed with water. Obtain Japanese medicine.

Formulation Example 2 Compound (1) 0.1 part, trialate 20 parts, polyoxyethylene sorbitan monooleate 8 parts, water 76.
A suspension is obtained by mixing 9 parts and wet milling until the particle size is less than 5 microns.

Formulation Example 8 5 parts of compound (1), 4 o parts of trialate, 5 parts of polyoxyethylene sorbitan monooleate, 5 parts of polyvinyl alcohol, and 45 parts of water were mixed and wet-pulverized until the particle size became 6 microns or less. Obtain a suspension.

Formulation Example 4 Compound (2) 1 part, Dialate 9 parts, Bentonite 8
0 parts, calcium lignin sulfonate 1 part, talc 59
Grind and mix well and add water (after kneading,
Granulate and dry to obtain granules.

Formulation Example 5 0.5 parts of compound (2), 2 parts of trialate, 80 parts of cyclohexanone, and 17.6 parts of toxanone P-aL are thoroughly mixed to obtain an emulsion.

These preparations are diluted with water or the like and treated with 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.

In addition, the composition of the present invention can be used in rice fields, upland fields, fallow fields, orchards,
It can be used as a herbicide in pastures, lawns, forests, non-agricultural lands, etc.

The application amount of the composition of the present invention varies depending on weather conditions, soil conditions, composition formulation, form, type of active ingredient, mixing ratio of active ingredients, target weeds and crops, etc., but usually the amount of active ingredient per hectare is The total amount is 10 to 10000f. Emulsions, wettable powders, suspensions, etc. are usually applied after diluting a predetermined amount with 100 to 1000 liters of water per hectare, and granules, etc. are usually applied as is without any dilution.

Next, the herbicidal effect of the composition of the present invention will be specifically illustrated by using a test sample.

The herbicidal efficacy is expressed as the growth inhibition rate (■) calculated by the following formula by measuring the fresh weight of the test plants that remained withered at the time of the survey.

Growth inhibition rate ■ = Test example 1 Upland soil treatment spectrum test area 88 x
22-3, Fill a vat with a depth of 11 crR with field soil, sow wheat, barley, Japanese grasshopper, Japanese foxglove, Japanese knotweed, Japanese knotweed, chickweed, Japanese violet, violet, and water the test material according to Formulation Example 1. A predetermined amount of the mixture was diluted with water and sprayed uniformly over the soil surface using a small sprayer from above a vat at a rate of 500 liters per hectare. Low herbicidal efficacy was investigated 85 days after spraying. The results are shown in Table 2. This test was conducted outdoors throughout the entire period.

Test example 2 Upland soil treatment spectrum test area 88x2
Pack field soil into a vat of 2 mλ and 115 W in depth, sow wheat, barley, oat, sagebrush, chickweed, trigonium, japonica, violet, and prepare the test material according to Formulation Example 1. Make it into a hydrating powder, dilute the specified amount with water, and add 5% per hectare.
The soil surface was uniformly sprayed with a small sprayer from above a vat at a rate of 0.00 liters. The herbicidal efficacy was investigated 85 days after spraying. The results are shown in Table 8. This test was conducted outdoors throughout the entire period.

Test Example 8 Upland Soil Treatment Test A vat with an area of 88×2!1a4 and a depth of 11α was filled with upland soil, oat seeds were sown, and the sample was made into a suspension according to Formulation Example 2, and a predetermined amount of it was It was diluted with the equivalent of 500 liters of water per hectare and applied uniformly to the surface of the tamayama using a small sprayer. Herbicidal efficacy was investigated 85 days after treatment. The results are shown in Table 4. This test was conducted outdoors throughout the entire period.

Table 4 Test Example 4 Upland soil treatment test area 88x28cs1. Pack field soil into a vat at a depth of 11 mm, sow Umanochahiki dish, make the sample into a wettable powder according to Formulation Example 1, and dilute the specified amount with water equivalent to 5001 Jtutle per hectare. Then, it was applied uniformly to the soil surface using a small sprayer. Weeding 85 days after treatment,
The efficacy was investigated. The results are shown in Table 6.

This test was conducted outdoors throughout the entire period.

Fill a vat with a fifth surface of 988 x 28 m and a depth of 1 lcr11 with field soil, sow the seeds of Prunus persica, make the test material into a suspension according to Formulation Example 2, and add the prescribed amount to a suspension equivalent to 500 liters per hectare. It was diluted with water and applied uniformly to the soil surface using a small sprayer. Efficacy was examined 85 days after treatment. The results are shown in Table 6.

This test was conducted outdoors throughout the entire period.

Table 6 The results of Tables 4 to 6 were calculated using the iso-effect line method [Fukami order-1 Yasuhiko Uesugi,
6 Tsuka (see %Zo, Chojibe Tomizawa Pesticide Experimental Methods Vol. 8 Herbicides Edition 1st Edition pp. 109-111 (1981, published by Soft Science)).The results are shown in Figures 1-8. Shown below.

[Brief explanation of the drawing]

(1) Figure 1 was drawn using the isoeffect line method based on the herbicidal efficacy against oats in Table 4 of Test Example 8. The horizontal axis is the active ingredient of compound (1) @ (f/ha)
, and the vertical axis is the amount of active ingredient of trialate (f/h
a) represents. The additive effect at a growth inhibition rate of 90% is shown by a broken line, and the isoeffect line at an actual growth inhibition rate of 90% is shown by a solid line. (2) Figure 2 was drawn using the iso-effect line method based on the herbicidal efficacy against Prunus japonicum in Table 6 of Test Example 4. The horizontal axis is the amount of active ingredient (IAa) of compound (2)
The vertical axis shows the additive effect of 90% diaryate as a broken line, and the solid line shows the iso-effect line of 90% of actual growth inhibition rate. (8) The IIHI diagram was drawn using the iso-effect line method based on the herbicidal efficacy against Prunus japonicum in Table 6 of Test Example 5. The horizontal axis is the amount of active ingredient (#/h
a), and the vertical axis is the amount of active ingredient of trialate (I
F/ha). The additive effect of a growth inhibition rate of 90X is shown by a broken line, and the isoeffect line of an actual growth inhibition rate of 9ON is shown by a solid line. Engraving of drawings (no change in content) Active ingredient of compound (1) @ (g/ha) Amount of active ingredient of compound (2) (g/ha) Amount of active ingredient of compound tl+ (g/ha)
/ha) Figure 3 Procedural amendment (method) % formula % 1. Indication of the case Patent Application No. 16496 of 1988 2. Name of the invention Herbicidal composition 3. Person making the amendment Relationship with the case Patent applicant Osaka 5-15 Kitahama, Higashi-ku, Osaka (209) Sumitomo Chemical Co., Ltd. Representative: Hideo Mori 4, Agent: 5-15 Kitahama, Higashi-ku, Osaka March 31, 1988 (shipment date) 6. Subject to amendment

Claims (1)

[Claims] General formula ▲ Numerical formula, chemical formula, table, etc. ▼ [In the formula, R represents a methyl group or a hydrogen atom. ] A tetrahydrophthalimide derivative represented by
, 3,3-trichloroallyl-N,N-diisopropylthiol carbamate or S-2,3-dichloroallyl-N,N-diisopropylthiol carbamate as an active ingredient.