JPS63307805A - Herbicidal composition - Google Patents

Abstract

PURPOSE:To obtain a herbicidal composition applicable in a small amount of chemical, by blending tetrahydroindazole having a specific substituent group with (2-amino-4-methylphosphinobutyryl)alanylalanine or salt thereof and an inorganic salt. CONSTITUTION:A herbicidal composition obtained by blending 3-chloro-2-(4- chloro-2-fluoro-5-propargyloxyphenyl)-4,5,6,7-tetrahydro-2H-indazole and (2-ami no-4-methylphosphinobytyryl)alanylalanine or salt thereof and one or more kinds of inorganic salts (e.g. sodium chloride, magnsesium sulfate or sodium borate), preferably at 1:0.2:100 (preferably 0.4-70):1-2,000 (preferably 10-500) (pts.wt.). This composition is effective in foliar treatment, especially in farmland.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides 3-chloro-2-(4-chloro-2-fluoro-5-propargyloxyphenyl)-4,5,6,
7-tetrahydro-2H-indazole [hereinafter referred to as compound (1)] and ()2-amino-4-methylphosphinobutyrylalanylalanine [hereinafter referred to as compound (2)]
] or a salt thereof and one or more inorganic salts (hereinafter referred to as the composition of the present invention).

Currently, many herbicides are used for agricultural and non-agricultural land, but because there are many types of weeds to control, there are many herbicides that are more effective and have a broader herbicidal spectrum. Development is desired.

Compound (2), glyphosate, etc. are herbicides that can be applied before planting crops or tilling, but with these, the period from when the chemical is applied until the weeds are completely killed is relatively long; About a day is required. If this weed-killing period can be shortened even a little, farmers will be able to start their next agricultural work, such as planting crops or plowing, that much sooner, which will be very advantageous.

As a result of various studies aimed at developing herbicides that meet these purposes, the present inventors discovered compounds (1) and (2).
and an inorganic salt, the composition of the present invention controls a wide range of weeds occurring in agricultural land or non-agricultural land, and its herbicidal effect can be applied at a lower dosage than when using them alone, They have also discovered that the onset of herbicidal effects is significantly accelerated, and have completed the present invention.

The herbicidal effect of the composition of the present invention develops very quickly, with symptoms appearing the day after treatment with the herbicide, and although it varies depending on the type of vehicle, it is usually possible to almost completely kill the weeds in about 3 to 5 days.

Weeds in fields that can be controlled by the composition of the present invention include:
Buckwheat, Japanese knotweed, Japanese knotweed, Japanese knotweed, Japanese knotweed, Japanese knotweed, pomegranate, Japanese sorrel,
Purslane, chickweed, flea beetles, Dutch oatweed, whiteweed, dogweed, blue-bellied beetle, Japanese radish, daikon radish, dogweed, Japanese scallion, white-eared mustard, shepherd's purse, ash, American occidentalis, yellow-throated grass, white clover, crow pea, oxalis, purple sorrel, hackberry, chishi Japanese knotweed, parsley, ichito, golden deer, field pansies, japonica, japonica, morning glory, common morning glory, European bindweed, convolvulus, common bindweed, yellowtail, common lily, hotokenoza, white-breasted morning glory, Japanese Physalis, walrus spp. , pigweed, Japanese poppy, sunflower, dogberry, corn marigold, mugwort,
Broad-leaved weeds such as dandelion, halcyon, and yomena,
Japanese barnyard grass, Japanese barnyard grass, foxtail grass, blackberry grass, white grass grass,
Weeds of the Poaceae family, such as Sparrow fern, Psyllium japonica, Prunus japonicus, Oat, Oat, Seiban sorghum, Grass grass, Japanese ryegrass, Shatter cane, Oriental sorghum, Japanese rye grass, Cypress weeds, and Araceae weeds such as Asiatic dayflower; Examples include weeds of the Cyperaceae family, such as Cyperaceae and Cyperus spp., and fern plants such as Horsetail, and the composition of the present invention is particularly effective in treating the foliage of upland fields.

The fact that compound (1) has herbicidal activity is disclosed in Japanese Patent Application Laid-open No. 59-8.
No. 4872, and compound (2) is a herbicide described in Tetsuo Takematsu, "Herbicide Research Overview", published by Hakuyusha (1982), page 611. Examples of inorganic salts include sodium chloride, potassium chloride, calcium chloride,
Mixtures of chlorides such as ammonium chloride, sulfates such as magnesium sulfate, nitrates such as ammonium nitrate, borates such as sodium borate, and inorganic salts such as Hyponesox 0 (commercial fertilizer, registered trademark of Hyvonex), etc. Can be mentioned.

In the composition of the present invention, the mixing ratio of compound (1), compound (2), and inorganic salt can be varied within a relatively wide range, but usually compound (2) is added to 1 part by weight of compound (1).
is 0.2 to 100 parts by weight, preferably 0.4 to 70 parts by weight, and the inorganic salt is 1 to 2000 parts by weight, preferably 1
It is 0 to 500 parts by weight.

In addition, sodium salt etc. are mentioned as a salt of (2-amino-4-methylphosphinobutyryl)alanylalanine.

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 to formulate an emulsion, wettable powder, suspension, or the like.

These preparations contain compound (1), compound (2) and inorganic salt in a weight ratio of 0.1 to 99%, preferably 0.5 to 99%.
Contains 80%.

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, and synthetic hydrous silicon oxide; Examples 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, dimethyl sulfoxide, and acetonitrile. , water, etc.

Surfactants used for emulsification, dispersion, wetting layers, etc. include anionic surfactants such as alkyl sulfate salts, alkylaryl sulfonates, dialkyl sulfosuccinates, and polyoxyethylene alkylaryl ether phosphate salts. 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. Other formulation adjuvants for Hana include alginate, polyvinyl alcohol, gum arabic, and CMC.
(carboxymethyl cellulose), PAP (isopropyl acid phosphate), etc.

The composition of the present invention can also be obtained by blending one or more inorganic salts into a formulation of compound (1) and compound (2) or a salt thereof, either alone or together.

Next, in a blending example, 0 parts indicate parts by weight.

Formulation Example 1 To 1.2 parts of pulverized compound (1), 8 parts of the sodium salt of compound C) and 3 parts of Toxil G, U-N (Tokuyama Soda registered trademark) were mixed and pulverized, and further magnesium sulfate was added. 40 copies, Demol SNB @ (Kao ■registered trademark)
4 parts, 1 part of Tsurupol 5029-08 (Toho Chemical ■ registered trademark), and 42.8 parts of clay were mixed and pulverized to obtain a wettable powder.

Formulation Example 2 (i) 6 parts of compound (1), 40 parts of sodium salt of compound (2), 3 parts of calcium lignosulfonate, 2 parts of sodium lauryl sulfate, and 49 parts of synthetic hydrous silicon oxide were thoroughly ground and mixed and hydrated. obtained the drug.

(ii) A spray liquid was prepared by diluting 10 g of the wettable powder obtained above and 100 g of magnesium sulfate with 1 (l) of water and stirring.

Formulation example 3 (i) Compound (100 parts, Tsurupol 3005
(Toho Chemical ■ registered trademark) was dissolved in 78 parts of xylene to obtain an emulsion.

(11) 6 g of the emulsion obtained above, 20 g of Herbiace water solvent (herbicide manufactured by Meiji Seika ■, containing 20% sodium salt of compound (2)) and ammonium sulfate IQO g
A spray liquid was prepared by dispersing or dissolving in water 101.

The composition of the present invention formulated in this manner is used to treat weeds during the growing season.

Furthermore, by mixing it with other herbicides, it can be expected to increase the herbicidal efficacy. In addition, insecticides, acaricides,
It can also be used in combination with nematicides, fungicides, plant growth regulators, fertilizers, etc.

Crops that can be used with the composition of the present invention include grains such as rice, wheat, barley, and corn; legumes such as soybeans, green beans, and adzuki beans; potatoes such as kanranchi and potatoes; and others.
Vegetables such as eggplants, cucumbers, daikon radish, tomatoes, etc. are available, and these crops can be treated before planting, before plowing, or between furrows. Also, rice field ridges, orchards,
It can be used as a herbicide on fallow land, sacrificial grassland, lawn land, forest, non-agricultural land, etc.

The application amount of the composition of the present invention depends on the mixing ratio of the active ingredients, the formulation form,
Although it varies depending on the type of target weed, weather conditions, etc., the total amount of compound (1) and compound (2) or its salt is usually 1 g to 100 g, preferably 2 g to 60 g per are, and the amount of inorganic salt is The amount is 2g to 200g per are. The amount of spraying varies depending on the growth level of the weeds, but
Usually 12-302 per are, preferably 21-2
It is 01. If necessary, add auxiliary agents such as a spreading agent.

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, a test example will be given to specifically demonstrate the herbicidal efficacy of the composition of the present invention.Evaluation of the herbicidal efficacy shows that the growth condition of the test plants at the time of the investigation was no different from that of untreated plants at all, and there was almost no difference. It is indicated by a number from 0 to 5 by visual observation, with a score of "0" indicating that the test plant is completely dead or a test plant with completely suppressed growth.

Test Example 1 A 115,000 are Wagner pot was filled with field soil and Italian ryegrass was sown, and then grown in a plastic greenhouse until the plant reached a height of 24 cm and a tiller loss of 4.0. A spray liquid (liquid volume equivalent to 10 liters per 1 area) prepared according to Formulation Example 2 was uniformly applied to the foliage surface from above the tWL object using a pressurized sprayer. After treatment, the plants were grown in a vinyl greenhouse for 4 days and their herbicidal efficacy was investigated. The results are shown in Table 1.

Table 1 Test Example 2 After filling a 115,000 are Wagner pot with field soil and sowing Italian ryegrass, the plants were grown in a plastic greenhouse until the plant height was 42C11 and the number of tillers was 6.3. A spray liquid (liquid volume equivalent to 10 liters per are) prepared according to Formulation Example 3 was uniformly applied to the upper surface of the plant using a pressurized sprayer. After treatment, the plants were grown in a vinyl greenhouse for 4 days and their herbicidal efficacy was investigated. The results are shown in Table 2.

Table 2 Test Example 3 Weed killing spectrum! Pack field soil into plastic containers measuring 17 cm, width 25 cs+, and depth 8 CIl, and sow seeds of goldenrod, foxtail grass, Seiban sorghum, crabgrass, shutter cane, giant cane, common morning glory, yellowtail, yellowtail grass, American golden deer, golden foxtail, and Japanese fir.
It was grown for 28 days. The composition of the present invention is formulated into a hydrating powder according to Formulation Example 1, and a predetermined amount of it is diluted with water containing a spreading agent equivalent to 10 liters per are. was uniformly processed. At this time,
The growth status of weeds varies depending on the car model, but it is at the 2- to 4-leaf stage,
The plant height was 4-35C11. The herbicidal efficacy was investigated 5 days after the treatment. The results are shown in Table 3. This test was conducted in a greenhouse throughout the entire period.

Claims (3)

[Claims] (1) 3-chloro-2-(4-chloro-2-fluoro-
5-propargyloxyphenyl)-4,5,6,7-
Tetrahydro-2H-indazole and (2-amino-4
-A herbicidal composition comprising alanylalanine (methylphosphinobutyryl) or a salt thereof and one or more inorganic salts as ingredients. (2) 3-chloro-2-(4-chloro-2-fluoro-
5-propargyloxyphenyl)-4,5,6,7-
Tetrahydro-2H-indazole and (2-amino-4
The composition according to claim 1, comprising a mixed herbicide containing alanylalanine (-methylphosphinobutyryl) or a salt thereof as an active ingredient, and one or more inorganic salts. (3) 3-chloro-2-(4-chloro-2-fluoro-
5-propargyloxyphenyl)-4,5,6,7-
Herbicide containing tetrahydro-2H-indazole as an active ingredient (2-amino-4-methylphosphinobutyryl)
The composition according to claim 1, which comprises a herbicide containing alanylalanine or a salt thereof as an active ingredient and one or more inorganic salts.