JPH03130205A - Herbicidal composition - Google Patents

Abstract

PURPOSE:To obtain a safe herbicide capable of mutually complementing effects on weeds which are difficult to control with a single agent and exhibiting synergistic effects even in a small amount of chemical by using a safe and specific herbicide excellent in herbicidal activity and a herbicide selected from tebuthiuron, diuron, etc., in combination. CONSTITUTION:A herbicidal composition, obtained by using at least one compound selected from a compound group expressed by formula I [Ar is formula II, III or IV (R<1> to R<3> and R<5> to R<9> are H, methyl or ethyl; R<4> and R<10> are H, OH, methyl, methoxy or ethoxy); R is methyl or methoxy] and at least one compound selected from a compound group expressed by formulas V to XI in combination and capable of complementing effects on weeds which are difficult to control with a single agent of the respective compounds, exhibiting complete control effects, simultaneously showing synergistic herbicidal effects in a small amount of chemical and having high safety for crops such as wheat.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to herbicidal compositions.

[Conventional technology]

Wheat, corn, rice, soybeans, etc. are important crops, and many herbicides have been used to increase the yield of these crops, but conventional herbicides lack herbicidal activity and crop safety. It cannot be said that herbicides are sufficient in terms of health, and a safe herbicide that kills noxious weeds in small amounts and does not cause phytotoxicity to crops is desired (in the formula, R1 to R3 and R5 to R9 are the same or mutually exclusive). R represents a hydrogen atom, a methyl group or an ethyl group, R4 and RIO represent a hydrogen atom, a hydroxyl group, a methyl group, a methoxy group or an ethoxy group), and R represents a methyl group or a methoxy group ] A group of compounds represented by JP-A-63-1077
9 has been proposed.

On the other hand, the following formulas [A] to [G] CH Go CHl lb I The compound represented by is a known herbicide.

[Problem to be solved by the invention]

However, the compound of general formula [I] and the formula [A
The compounds of ] to [G] are effective against various weeds when used in high doses, but when used in low doses, there is a problem that only a few weed species are effective.

The present invention is intended to solve the above-mentioned conventional problems, and by using the compound of general formula [I] and the compounds of formulas [A] to [G] in combination, They complement each other to show a complete control effect on weeds that are difficult to control, and also exhibit a synergistic herbicidal effect even at low doses that cannot be completely controlled with a single agent, and are highly effective against crops such as wheat. The objective is to provide a safe herbicide composition.

[Means to solve the problem]

The present invention provides at least one compound of the general formula CI] and the following formulas [A] and [B]
[C], [D], [E], [F] and [G]
In the formula, Ar is the formula:
R represents a methyl group or a methoxy group] and at least one compound selected from the group of compounds represented by I. This is a herbicide composition containing as an active ingredient.

Examples of compounds of general formula [I] are shown in Tables 1 to 3.
There is something on the front.

(Main text below) Table 2 The compound of general formula [I] in Table 3 is produced by the reaction described in JP-A-63-10779.

The compounds of formulas [A] to [G] (hereinafter referred to as compounds A to G) are as follows.

Compound A tebuthiuron 3-(5-(1,1-dimethylethyl)-1,3,4
-Thiadiazoyl-2-yl)-1,3-dimethylurea compound B th iaz f 1 uron 1,3-dimethyl-3-(5-)lifluoromethyl-1
,3,4-thiadiazol-2-yl]urea compound C ethidimuron 1-(5-ethylsulfonyl-1,3,4-thiadiazol-2-yl)-1,3-dimethylurea compound D 1uron 3-(3, 4-dichlorophenyl)-1,1-dimethylurea compound E 1inuron 3-(3,4-dichlorophenyl)-1-methoxy-1
-Methylurea compound F dicamba 3.6-dichloro-2-methoxybenzoic acid compound G triclopyr ((3,5,6-)dichloro-2-pyridyl)-oxy]acetic acid triethylamine salt Compound of general formula [I] The herbicidal composition of the present invention containing Compounds A to G as active ingredients can have excellent herbicidal effects by spraying on foliage during the weed growing season. General formula [I
] and Compounds A to G vary depending on the type of weed, growth stage, density of occurrence, etc., but usually the compound of general formula [I] is used at 0.05 to 0.5 kg/ha, and the compound A is used at a rate of 0.05 to 0.5 kg/ha. -G is preferably used in an amount of 0.05 to 1 kg/ha.

The herbicide composition of the present invention can be formulated into, for example, granules, wettable powders, emulsions, fine granules, powders, etc. by blending the above-mentioned active ingredients with carriers, surfactants, dispersants, adjuvants, etc. Preferably, it is formulated and applied. Suitable carriers include, for example, talc, bentonite, clay, kaolin, diatomaceous earth, white carbon, vermiculite, slaked lime, silica sand, ammonium sulfate, solid carriers such as urea, isopropyl alcohol,
Examples include liquid carriers such as xylene and cyclohexanone. Examples of surfactants and dispersants include alcohol sulfate ester salts, alkyl sulfonates, lignin sulfonates, polyoxyethylene glycol ethers, polyoxyethylene alkylaryl ethers, polyoxyethylene sorbitan monoalkylates, and the like. . Examples of the adjuvant include carboxymethylcellulose, polyethylene glycol, gum arabic, and the like.

Examples of formulations of the herbicide composition of the present invention are shown below. In the examples, % is by weight.

Formulation Example 1 (Wettable powder) Compound of general formula [I1 6%, Compound A-03-24%,
A wettable powder is prepared by uniformly mixing and pulverizing 3% of a sodium salt of a higher alcohol sulfate ester and 88 to 67% of kaolin.

Formulation example 2 (emulsion) 10% of the compound of general formula [I], compound A-(:, 5-4
0%, polyoxyethylene alkylaryl ether
30% of cyclohexanone and 35 to 10% of dimethylformamide are uniformly dissolved to form an emulsion.

The herbicidal composition of the present invention is prepared by diluting the above-mentioned preparation to an appropriate concentration and spraying it, or by applying it directly.

Furthermore, the herbicide composition of the present invention may optionally contain an insecticide,
Mixtures with fungicides or other herbicides and complex formulations are also possible.

The herbicide composition of the present invention is suitable for
It exhibits excellent herbicidal activity against various broad-leaved weeds such as whiteweed, datura, Japanese knotweed, black-and-white weed, bindweed, polygonum, Japanese violet, violet, Japanese violet, black-and-white violet, chickweed, white-eared mustard, shepherd's purse, white-breasted weed, hotokenoza, chamomile, and white-leaved weed. It is highly safe for useful crops such as wheat, barley, and corn.

〔Effect of the invention〕

As described above, according to the present invention, due to the synergistic effect of the compound of formula [I] and the compounds of formulas [A] to [G], it is possible to use a low dosage for a wide range of weeds that are difficult to control with a single agent. Provided is a herbicidal composition that has excellent herbicidal activity and is highly safe for useful crops.

Examples are shown below to explain the present invention in more detail.

〔Example〕

A 1/2000a plastic pot was filled with sifted field soil (clay loam), and seeds of Japanese fir tree, Japanese crocodile, Datura glomerata, Japanese violet, Noassa gloria, Cinnamon japonica, and corn (Punto corn) were sown into the pot, and covered with ICII+ soil. These plants were grown in a greenhouse, and when the corn had grown to five leaves, a predetermined amount of the hydrating agent prepared according to Formulation Example 1 was added to 1.5 jl per a (are)! The leaves and foliage were sprayed using a microspray with a volume of water (liters). A 2000 times neoesterin solution was added as a spreading agent. After the chemical treatment, the test materials were kept in a greenhouse, and one month after the chemical treatment, the herbicidal effect and chemical damage were investigated using the following evaluation criteria, and the results are shown in Table 4.

(Margins below this page) Evaluation Criteria In Table 4, the marks represent comparative examples in which the compound of general formula [I1 or compounds A to G were used alone.

(Margins below this page) Table (2) Table (1) Table (3) From the above results, the herbicide composition of the present invention has herbicidal activity against a wide range of weeds at a small dose. It can be seen that it is safe and has no chemical damage to useful crops.

Claims (1)

[Claims] General formula [I] ▲ There are mathematical formulas, chemical formulas, tables, etc. ▼ [ I ] [In the formula, Ar is a formula: ▲ There are mathematical formulas, chemical formulas, tables, etc. ▼, ▲ Numerical formulas, chemical formulas,
There are tables, etc. ▼ or ▲ There are mathematical formulas, chemical formulas, tables, etc. ▼ (In the formula, R^1 to R^3 and R^5 to R^9
are the same or different and represent a hydrogen atom, a methyl group or an ethyl group, and R^4 and R^1^0 represent a hydrogen atom, a hydroxyl group, a methyl group, a methoxy group or an ethoxy group)
and at least one compound selected from the group of compounds represented by the formula [A], [B], [C], [
D], [E], [F] and [G] ▲ There are mathematical formulas, chemical formulas, tables, etc. ▼ [A] ▲ There are mathematical formulas, chemical formulas, tables, etc. ▼ [B] ▲ There are mathematical formulas, chemical formulas, tables, etc. ▼ [C] ▲ There are mathematical formulas, chemical formulas, tables, etc. ▼ [D] ▲ There are mathematical formulas, chemical formulas, tables, etc. ▼ [E] ▲ There are mathematical formulas, chemical formulas, tables, etc. ▼ [F] ▲ There are mathematical formulas, chemical formulas, tables, etc. A herbicide composition containing as an active ingredient at least one compound selected from the group of compounds represented by ▼[G].