JPS59104301A - Herbicidal composition - Google Patents

Abstract

PURPOSE:A herbicidal composition that contains an N-phenyltetrahydrophthalimide derivative and a phenoxypropionic acid derivative and exerts synergistic herbicidal effect on weeds of various kinds, especially on a wide range of weeds in soybean fields selectively with small amounts of application. CONSTITUTION:An N-phenyltetrahydrophthalimide derivative of formula I (R is lower alkyl, cycloalkyl, lower-haloalkyl), which is useful as a selective herbicide in soybean fields and a phenoxypropionic acid derivative of formula II (X is H, Cl, Y is Cl, CF3; R is lower alkyl), which is known as a selective herbicide for crops such as soybean, e.g. compounds of formula III and formula IV, are mixed at a weight ratio of 1pt. of the former compound to 0.1-50pts. of the latter. The resultant composition can exert effective herbicidal effect against green foxtail, barnyard grass, common morning-glory, Indian mallow, and cocklebur simultaneously. The application amount is 1.5-20g/a based on the active ingredients.

Description

Detailed Description of the Invention The present invention provides a hephenyltetrahydrophthaloid derivative represented by the general formula [IJ [wherein J represents a lower alkyl group, a cycloalkyl group, or a halo-lower alkyl group]] (Hereinafter, compound [I
J) and the general formula [where X represents a hydrogen atom or a chlorine atom, Y represents a chlorine atom or a trifluoromethyl group, and 几 represents a lower alkyl group]. ] The present invention relates to a herbicidal composition containing a phenoxypropionic acid derivative represented by (hereinafter referred to as compound [IIJ]) as an active ingredient.

Currently, it is used as a herbicide for upland fields, but there are many types of weeds that can be controlled, and the weeds that appear over a long period of time are highly effective and have a wide range of herbicidal properties. A1 is in need of a herbicide that is safe for crops that have 1,000,000 yen and rams.

As a result of various studies on these points, the present inventors found that
Compound [I] useful as a selective herbicide in Tice (Japanese Patent Application No. 56-212896, 57-1384)
Compound [II'] (No. 5, No. 57" 17858) is known as a selective herbicide for crops such as type
5bortB, r+vicwof, Hcrbicide
s.

4thedltlOn, HIMInfin3aChOm
The herbicidal composition of the present invention containing as an active ingredient a wide variety of weeds, especially a wide range of weeds in Thai rice fields, and its herbicidal effect is It was discovered that compared to the case of using it alone, it increased to ``■'' and that it could be applied at a low dosage (*, the present invention was completed).

The weeds to which the herbicidal composition of the present invention is applied include monocotyledonous plants such as sorghum, hackberry, black-and-white grass, black-and-white sorghum, sorghum, and sorghum; , Red-winged crows such as Red-spotted lily, Red-bellied mushrooms, Red-breasted mushrooms, Inupowskii,
There are dicotyledonous plants such as Nosho sunflower.

The herbicidal composition of the present invention can particularly weed problematic weeds, such as the weeds such as foxgloves, Japanese millet, Japanese aphrodisiacs, and silverworts such as silverworts, Japanese grasshoppers, and silverfish ε when they are weeded.

The mixing ratio of compound [r] and compound CIT, which are the active ingredients of the herbicidal composition of the present invention, can be varied over a relatively wide range, but usually 0 parts by weight of compound [n] to 131 parts by weight of compound .1 to 50 parts, preferably 0.2 to 2 parts
It is 0 parts by weight.

Table 1 shows some of the compound [1] and compound [II] which are the effective ingredients of the herbicidal combination rjl1i of the present invention.

The compound numbers shown in Table 1 are commonly used in the following formulation examples and test examples.

Table 1 When the herbicidal composition of the present invention is used as a herbicide, it is usually used in the form of emulsions, wettable powders, suspensions, granules, etc. using solid carriers, liquid carriers, surfactants, and other NIJ manufacturing adjuvants. Formulated into a drug, etc.

These preparations contain active ingredients at Km ratios of 0.5 to 90%.
, preferably 2 to 80%.

Solid carriers include kaolin clay, atano (lugite clay, bentonite, acid clay,) kuirophyllite,
There are fine powders or granules such as talc, diatomaceous earth, calcite, walnut powder, urea, ammonium sulfate, and synthetic hydrous silicon oxide, and liquid carriers include aromatic hydrocarbons such as niha, xyleno, methylnaphthalene, isopropanol, ethylene glycol, and cellosolve. alcohols such as acetone, cyclohexanone, isophorone, vegetable oils such as soybean oil, cottonseed oil, dimethyl sulfoxide, acetonitrile, water, etc.

Surfactants used for emulsification, dispersion, and moistening include alkyl sulfate salts, alkyl (aryl) sulfonate salts, dialkyl sulfosuccinate salts, and polyoxyethylene alkylaryl ether phosphate salts. ionic field II agent, polyoxyethylene alkyl ether, polyoxyethylene alkylaryl ether,
Examples include nonionic surfactants such as polyoxyethylene polyoxypropylene block copolymers, sorbitan fatty acid esters, and polyoxyethylene sorbitan fatty acid esters. Formulation adjuvants include lignin sulfonate, alginate, polyvinyl alcohol, gum arabic, (
, iMC (carboxymethyl cellulose), 1'AP (
acidic isopropyl phosphate), etc.

Examples of formulations are shown below. Note that the part indicates the M-position part.

Formulation Example 1 20 parts of compound (2), 80 parts of compound (u), 3 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 5 parts of Compound (1), 15 parts of Compound (i), 14 parts of polyoxyethylene styrylephenyl ether, 6 parts of calcium dodecylbensene sulfonate, and 60 parts of xylene are thoroughly mixed to obtain an emulsion.

Formulation Example 3 1 part of compound (3), 1 part of compound (LF3), 1 part of synthetic hydrated silicon oxide, 2 parts of calcium lignosulfonate, 80 parts of bentonite and 65 parts of kaolin clay are thoroughly ground and mixed, and water is added. After kneading, granulate and dry
get the agent.

Formulation Example 4 5 parts of compound (4), 20 parts of compound (I), 8 parts of polyoxyethylene sorbitan mono-1/ate, 3 parts of CMC and 69 parts of water were mixed and wet-pulverized until the particle size became 5 microns or less. to obtain a suspension.

These preparations are used as they are or after being diluted with water or the like for foliage treatment or soil treatment.

Furthermore, by mixing it with other herbicides, it can be expected to increase the herbicidal efficacy. Furthermore, it can be mixed with insecticides, miticides, nematocides, fungicides, plant growth regulators, fertilizers, soil conditioners, etc., and then used.

The amount of rotation of the decontamination 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 the active ingredients, the target weeds and crops, etc., the amount of active ingredient per are is usually 1.5 to 20F.

Emulsions, wettable powders, DA clouding agents, etc. are diluted with 1 liter to 10 liters of water (added with necessary IC, 1f1, etc.) and applied. The agents are applied as is without any dilution.

In addition to the above-mentioned surfactants, the spreading agents include polyoxyethylene m1lt' [(ester), phosphoric acid salt, abietate, dinaphthylmethane disulfonic acid m, /f rough, yne, etc. do.

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 a growth inhibition rate (%) calculated from the following formula, using the amount of fresh M in the above-ground parts of the test plants that remained dead at the time of the survey as 1.

Test Example 1 A cylindrical plastic bottle with a diameter of 10 m and a depth of 10 crn was filled with field soil, and seeds of Enocoloccus or Physalis were sown, covered with soil, and then grown outdoors for 20 days. A predetermined amount of the test compound made into a hydrating powder according to Formulation Example 1 was diluted with water containing a spreading agent, and sprayed with a small spatula at a rate of 10 liters per area, above the throat of the plastic. Sprayed on leaves and foliage. The test plants were at the 3-4 leaf stage at the time of spraying. After spraying, the plants were grown outdoors for 20 days and their herbicidal efficacy was investigated. The results are shown in Tables 2 and 3.

Table 2: Division t' for foxtail grass? Efficacy (growth inhibition rate)) Table 3 Herbicidal efficacy against crabgrass (growth inhibition rate (
%)) Test Example 2 A vat with an area of 38 x 23 cJ and a depth of 11/771 cm was filled with field soil, and m types of wild foxtail, f. Dirishita.

Thereafter, 9, which had been made into a wettable powder according to Formulation Example 1, was diluted with water containing a spreading agent, and 5%
Little Spray: 11 pieces and small size: Use a sprayer to apply one layer evenly over the entire stem and leaves from the top of the plant. At this time, the 4t α of each plant varies depending on the seedling, but it is 1 to 4, T21tl
It was l. The herbicidal efficacy was examined after 2OII spraying. The conclusion of the Sung Dynasty is shown in Table 4.1. In addition, this test was conducted outdoors during all questions.

111/ one,,,//·" ,-// 7-/- 77' 11/ Table 4 Effect of various 71 in the evening and 1 year old

Claims (1)

[Scope of Claims] -Phenyltetrahydrophthalimide represented by the general formula [wherein ■ (represents a lower alkyl group, cycloalkyl group, or halo tetra-alkyl group]] [wherein X is water f; ' atom or chlorine atom, Y represents a chlorine atom or a trifluoromethyl group, and 1t represents a 415-class alkyl group] as an active ingredient. .