JPS61280404A - Herbicidal composition - Google Patents

Abstract

PURPOSE:A herbicide containing a 2-(5-n-pentyloxycarbonylmethoxyphenyl)- tetrahydroisoindole-1,3-dione derivative and a 2-imidazol-2-yl-3-quinolinecarboxylic acid. CONSTITUTION:A herbicide containing a compound expressed by formula and a compound expressed by formula II as active constituents at 1:0.5-20 weight ratio in an amount of 1-80wt% based on the total pharmaceutical. This herbicide is capable of removing selectively a wide range of weeds particularly in peanuts and soybean fields, and the herbicidal effect thereof is synergistically increased as compared with the independant use thereof. Thus, the herbicide can be applied in a small amount of chemical. The above-mentioned herbicidal composition is normally formulated into an emulsion, wettable powder, suspension, granule, etc. using a solid carrier, liquid carrier, surfactant or another adjuvant.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention has the following properties:
methyloxycarbonylmethoxyphenyl)-4,5
,6,7-tetrahydro-2H-isoindo-/L/-
t,a-dione (hereinafter referred to as compound CD) and 2-
[4,5-dihydro-4-methy/l/-4-(1-methylethyl/L/)-Fl #*V-1)T-
J: )l" 11 ++, A/ -9-/ Jl/
M-8-quinolinecarboxylic acid (hereinafter referred to as compound (II)
It is written as ) as an active ingredient (hereinafter referred to as the composition of the present invention) K.

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 herbicides that meet these objectives, the present inventors discovered the compound Cxl and the compound (I
The composition of the present invention containing I) as an active ingredient can selectively weed various weeds, especially a wide range of weeds in peanut and soybean fields, and its herbicidal efficacy is higher than that when used alone. and increase synergistically,
The present invention was completed based on the discovery that it can be applied at low doses and has a broader herbicidal spectrum.

Weeds targeted by the composition of the present invention include monocotyledonous plants such as foxtail grass, crabgrass, goldenweed, seiban sorghum, and sorghum, morning glories such as whitewort, sorghum, purslane, onagina, chinensis, chinensis, and mulva morningglory; Examples include dicotyledonous plants such as American hornwort, American goldenrod, dogfish, and wild sunflower.

The composition of the present invention can simultaneously weed weeds that are particularly difficult to weed, such as weeds such as trumpet grass, whiteweed, red-winged deer, black-and-white weed, and dogfish.

Compound CI] (Japanese Unexamined Patent Publication No. 58-110566) has a herbicidal effect, and compound
24864) is known as a herbicide.

Compound CI] which is the active ingredient of the composition of the present invention] and Compound [
Although the mixing ratio with [] can be varied over a relatively wide range, it is usually a mixture of compound (I
I) 0.2 to 50 parts by weight, preferably 0.5 to 20 parts by weight.

The chemical structural formulas of compound [''11] and compound (Il) 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 from 0.5 to 90% by weight.
, preferably 1 to 80%.

Solid carriers include kaolin clay, attapulgite clay, bentonite, acid clay, pyrophyllite,
Examples include fine powders or granules such as Merck, diatomaceous earth, calcite, walnut powder, urea, ammonium sulfate, and synthetic hydrated silicon oxides. Examples of i-form carriers include aromatic hydrocarbons such as xylene and methylnaphthalene, isopropanol, Examples include alcohols such as ethylene glycol 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 carbon, etc. include alkyl sulfate salts, alkyl, /L/(ary-/L/) sulfonates, dialkyl sulfosuccinates, polyoxyethylene alkylaryl Anionic surfactants such as ether sic acid ester salts, polyoxyethylene alkyl ether, polyoxyethylene alkyl aryl ether, polyoxyethyleneze II-j-, cypropylene block copolymer, sorbitan fatty acid ester, holoxy Examples include nonionic surfactants such as ethylene sorbitan acid ester. Adjuvants for formulation include ligenine sulfonate, alginate, polyvinyl alcohol, gum arabic, CMC (carpoquin methyl sesame), PAP (isopropyl acid phosphate/I
/) etc.

Examples of formulations are shown below. Parts indicate parts by weight.

Formulation Example 1 Compound ("I") 10 parts, Compound CT1] 10 parts, synthetic hydrous silicon oxide 10 parts, alkyl sulfate ester A/8 parts,
2 parts of calcium ricninsulfonate and ±65 parts of diatoms are thoroughly ground and mixed to obtain a wettable powder.

Formulation Example 2 Mix together 0.5 parts of compound ("I), 1.5 parts of compound (u), 1 part of synthetic hydrous silicon oxide, 2 parts of calcium lignosulfonate, 80 parts of bentonite, and 65 parts of kaolin clay. Granules are obtained by drying the paddy.

Formulation Example 3 40 parts of compound 1rl, 40 parts of compound CT1, 3 parts of lignosulfonate carta, 2 parts of sodium furyl sulfate, and synthetic hydrous silicon oxide were diluted and subjected to foliage treatment. In addition to treating plants from above, foliar treatments include local treatments that treat only weeds so that they do not adhere to crops.

By mixing it with other herbicides, it is expected that the herbicidal efficacy will be enhanced. Furthermore, it can be used in combination with insecticides, acaricides, nematicides, fungicides, plant growth regulators, fertilizers, soil conditioners, and the like.

Application of the composition of the present invention:! l 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 0.5 to 10.

For emulsions, wettable powders, @1 agents, etc., the prescribed amount is usually diluted with 1 to 10 liters of water per micrometer (if necessary, a spreading agent such as a spreading agent is added). Granules and the like are usually applied as is without any dilution.

In addition to the above-mentioned surfactants, examples of the spreading agent include polyoxyethylene lliic acid (ESTE/I/), lignin sulfonate, abietate, dinaphthylmethane disulfonate, paraffin, etc. .

Next, test examples will be given to specifically demonstrate the herbicidal efficacy of the 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.

Growth suppression rate (%) Example 1 of pressure storm load test of Noriyona in the untreated area Area 118 x 2 B + - 111, depth 11ω filled with field soil , American goldenrod and soybean were sown and grown for 18 days. Thereafter, the sample was made into a wettable powder according to Formulation Example 1, and a predetermined amount of it was diluted with water containing a spreading agent.
The mixture was uniformly sprayed from the top of the plant over the entire stem and leaves using a small sprayer at a rate of 5 liters per 9 tons per hour. At this time, the growth of each plant varied depending on the grass species, but was at the 1-4 leaf stage. The herbicidal efficacy was investigated 20 days after spraying. The results are shown in Table 2.

Note that this test was conducted outdoors throughout the entire period.

Table 2 Efficacy test example 2 against various weeds Field soil was filled in plastic pots with a diameter of 11 and a depth of 83, and Japanese crocodile, Japanese Physalis, Japanese Physalis, Golden Deer, and Soybean were sown and grown for 14 days. Thereafter, the test material was made into a hydrating powder according to Formulation Example 1, a predetermined amount of it was diluted with water containing a spreading agent, and a small r. It was evenly sprayed over the entire surface of the stems and leaves using a RIII device. At this time, the growth of each plant varied depending on the grass species, but was at the 1-8 leaf stage. The herbicidal efficacy was investigated 14 days after spraying. The results are shown in Table 8. In addition,
This test was conducted in a greenhouse throughout the period.

Table 8 Efficacy test example 8 against each shelf weed A plastic pot with an area of 11 x 15 i and a depth of 71 m was filled with field soil, and 4 liters of green bean was applied evenly over the entire stem and leaf area using a small sprayer from above the plant. Spread. At this time, the growth of A. japonica was at the 8-leaf stage and the plant height was 5 tW1. The herbicidal efficacy was investigated 22 days after spraying. The results are shown in Table 4.

Note that this test was conducted outdoors throughout the entire period.

The results shown in Table 4 were analyzed by the isoeffect line method (Pesticide Experimental Method 8, Weeding Side Body, pp. 109-116, Hideo Koita). The isoeffect line method is a composition consisting of different mixing ratios of compound [r] and compound [[]. For example, several combinations showing a 90% growth inhibition rate are determined, and these are shown in Figure 1. If plotted like this, synergistic effects, additive effects, and tangent effects can be easily determined.

When a synergistic effect is shown, an actual isoeffect line is shown below the additive effect.

In Test Example 8, as shown in Fig. 1, the iso-effect line for suppressing 90% of blue-throated beetle of the mixture is located below the additive effect line, and this analytical method clearly shows that there is a synergistic effect. It was shown that

[Brief explanation of the drawing]

Figure 1 shows 90% of the test example 8.
Iso-effect lines for growth inhibition are shown. The solid line shows the additive effect, the dotted line shows the synergistic effect, the vertical axis shows the drug dose of compound [■], and the horizontal axis shows the central dose of compound r11. (ID (f/&) compound CI)

Claims (1)

[Claims] 2-(4-chloro-2-fluoro-5-n-pentyloxycarbonylmethoxyphenyl)-4,5,6,7-
Tetrahydro-2H-isoindole-1,3-dione and 2-[4,5-dihydro-4-methyl-4-(1-
methylethyl)-5-oxo-1H-imidazole-2
-yl]-3-quinolinecarboxylic acid as an active ingredient.