JPS61109701A - Imidazole based herbicide - Google Patents

Abstract

PURPOSE:A quick-acting herbicide, capable of exhibiting superior herbicidal effect on various weeds such as barnyard grass, oats, an indian mallow and Japanese radish, and containing 2-methyl-2(5)-trifluoromethyl-5-(4)-nitroimidazole as an active ingredient. CONSTITUTION:A herbicide, containing 2-methyl-4(5)-trifluoromethyl- 5(4)- nitroimidazole as an active ingredient, and usually used after formulated into such as an emulsion, wettable powder, suspension and granules mixed with a support, adjuvant, etc. The amount of the active ingredient to be contained in the formulation is within 1-90% range by wt. ratio. The herbicide may also be used in a form mixed with another herbicide, insecticide, fertilizer, soil conditioner, etc. Said herbicide is effective on gramineous weeds such as barnyard grass and oats, broadleaf weeds such as Indian mallow, Japanese radish and Pharbitis purpurea Voigt, commelinaceous weeds, cyperaceous weeds, etc. and used by soil treatment, foliar treatment or treatment under flooding condition as pre-or post-emergence treatment. It is used in paddy field, upland field, orchard, pasture, turf, forest, etc.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a herbicide (hereinafter referred to as the composition of the present invention).

The composition of the present invention can be used to treat foliage and soil in upland areas, including 8 different types of weeds, such as buckwheat, snailweed, chickweed, whiteweed, blueberry, daikon radish, shepherd's purse, shepherd's purse, American hornwort, Wide range of weeds such as Ebisu grass, Japanese golden deer, Field pansy, Yaemugura, American morning glory, Malva morning glory, Western bindweed, Japanese lily, Hotokenoza, Japanese morning glory, Japanese Physalis, Japanese dogfish, Japanese fir tree, Japanese fir, sunflower, Japanese chamomile, corn marigold, etc. , Poaceae weeds such as barnyard grass, barnyard grass, foxtail grass, black grass, grasshopper, oat, oat, oat, grasshopper, grasshopper, horseweed, cypress, horseweed, and dayflower weeds such as dayflower,
It has weeding power against weeds of the Cyperaceae family, such as Cyperaceae and Cyperaceae. Moreover, its feature is that it is fast-acting.

Il II J, Org, Chem,, 47286
7 (1982).

When the composition of the present invention is used as a herbicide, it is usually mixed with a solid carrier, a liquid carrier, a surfactant, and other formulation auxiliaries, and formulated into an emulsion, an F3-1IIL agent, a granule, or the like.

Zor! Attraction ratio: 1-90g6. Preferably 5-70
%contains.

As solid carriers, fine powders or granules such as kaolin clay, abtapulgite clay, bentonite, acidic 8 earth, pyrophyllite, talc, diatomaceous earth, calcite, walnut powder, urea, ammonium sulfate, and synthetic hydrous oxidation products can be used. Examples of 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, and vegetable oils such as soybean oil and cottonseed oil. , dimethyl sulfoxide, dimethyl formamide, acetonitrile, water and the like.

□: Surfactants used for emulsification, dispersion, wet layer, etc. include single ions such as alkyl sulfate salts, alkylaryl sulfonate salts, dialkyl sulfosuccinate salts, and polyoxyethylene alkylaryl ether phosphate salts. Examples include surfactants, nonionic surfactants such as polyoxyethylene alkyl ether, polyoxyethylene alkylaryl ether, polyoxyethylene polyoxypropylene block copolymer, sorbitan fatty acid ester, and polyoxyethylene sorbitan fatty acid ester. As a formulation adjuvant,
Examples include lignin sulfonate, alginate, polyvinyl alcohol, gum arabic, CMC (carboxymethylcellulose), and PAP (isopropyl phosphate).

Examples of formulations are shown below. The section indicates the M section.

- 50 parts of ditroimitasol, 8 parts of calcium lignosulfonate, 2 parts of sodium lauryl sulfate, and 45 parts of synthetic hydrated silicon oxide are ground and mixed to obtain a wettable powder.

10 parts of 12-troy ξdazole, 14 parts of polyoxyethylene styryl phenyl ether, 6 parts of calcium dodecylbenzenesulfonate, 40 parts of xylene and 80 parts of dimethylformamide are thoroughly mixed to obtain an emulsion.

- 2 parts of ditroimigsol, 1 part of synthetic hydrous oxide,'
2 parts of calcium J geninsulfonate, 30 parts of bentonite
s and 65 parts of kaolin clay are thoroughly ground and mixed, water is added and the mixture is thoroughly kneaded, followed by granulation and drying to obtain granules.

-25 ftB of ditroimidazole, 3 parts of polyoxyethylene sorbitan monooleate, 3 parts of CMC, 69 parts of water
The particles are mixed to a particle size of 5 microns or less. Wet grind to obtain a suspension.

10 parts of leucidazole, 1 part of polyoxyethylene styrylphenyl ether, and 89 parts of water are mixed to obtain a liquid preparation.

The composition of the present invention thus formulated is subjected to soil treatment, foliage treatment, or flooding treatment before or after the emergence of weeds. Soil treatment includes soil surface treatment, soil mixing treatment, etc., and foliar treatment includes treatment from above the plant body as well as local treatment of weeds to prevent them from adhering to crops.

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 composition of the present invention can be applied to rice fields, fields, orchards, pastures,
It can be used as a herbicide on lawns, forests, non-agricultural lands, etc.

When nitroimidazole is used as an active ingredient in the composition of the present invention, the processing company usually uses 5f to 400 ml per are, although it varies depending on weather conditions, formulation form, treatment time, method, location, target weeds, target crops, etc. f, preferably from 101 to 100 f, and for emulsions, wetting agents, suspending agents, etc., the predetermined amount is usually 1 liter to 10 f per are.
They are treated by diluting them with a little water (if necessary, with the addition of adjuvants such as spreading agents), while granules and the like are usually treated as they are 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 demonstrate that the composition of the present invention is useful as a herbicide. The compounds used for comparison are indicated by compound symbols in Table 1.

Table 1 In addition, herbicidal efficacy was determined by visually observing the degree of inhibition of budding and living mushrooms of test plants during the survey, and ``0'' indicates that there was no or almost no difference from when no compound was tested. If the test plant died or its growth was completely inhibited, it was evaluated as "5", and evaluated on a scale of θ to 5, 0.1.2.
8.4.5.

Test Example 1 Upland Soil Mixing Treatment Test Upland soil was placed in a cylindrical plastic pot with a diameter of 10 squares and a depth of 103 mm, and millet, oat, and g. After diluting with 1 liter of water and treating the soil surface with a small sprayer, the surface layer of the soil up to a depth of 4 was thoroughly mixed. After treatment, 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 Test Example 2 Upland Stem and Leaves Treatment Test Cylindrical plastic pots with a diameter of 10 cm and a depth of 10 cr It were filled with upland soil, and millet, oat, radish,
Straw the Japanese Ichibi into a trellis, use leumidazole as a hydrating agent in a greenhouse for 1 day, dilute the specified amount with water containing a spreading agent equivalent to 10 liters per are, and use a small sprayer to spray the stems and leaves from above the plant. Processed. Grow in a greenhouse for 20 days after treatment,
We investigated the weeding power. The result is 3221st page.

Table 8 Test Example 8 Field soil, stem, and leaf treatment test surface [33 x 285 IN, 11 cm deep vat was filled with field soil, and soybean, cotton, sugar beet, morning glory, Japanese fir, Japanese grass, corn, wheat, Japanese millet, Seiban sorghum, and hackberry were grown. Sow, 18
Day f [raised. Then, according to Formulation Example 1, 2-Me (j
) (4) Chill-
Make 4-trifluoromethyl-imidazole into a hydrating agent, dilute the specified amount with water equivalent to 5 liters per 1 area including a spreading agent, and spray the stems and leaves from one side of the plant with a small sprayer. The entire surface was treated uniformly.

At this time, the growth conditions of weeds and crops varied depending on the flower species, but they were in the 1-4 leaf stage and the plant height was 2-12 IM. The herbicidal efficacy was investigated 20 days after the treatment. The results are shown in Table 4. Note that this test was conducted outdoors throughout the entire period.

Table 4

Claims (1)

[Claims] 2-Methyl-4(5)-trifluoromethyl-5(4)
- A herbicide characterized by containing nitroimidazole as an active ingredient.