JPH01117809A - Herbicide composition - Google Patents

Abstract

PURPOSE:To obtain the above composition controlling a various kinds of weeds with a small amount, by blending a specific compound showing herbicidal effects on broad-leaf weeds but insufficient effects on gramineous weeds with one of S-(4-chlorobenzyl)-N,N-diethyl thiocarbamate, etc. CONSTITUTION:A herbicide composition containing a compound shown by the formula and exhibiting herbicidal effects on broad-leaf weeds but insufficient effects on gramineous weeds and at least one selected from S-(4-chlorobenzyl)- N,N-diethyl thiocarbamate, alpha,alpha,alpha-trifluoro-2,6-dinitro-N,N-dipropyl-para-toluidine, N-(1-ethylpropyl)3,4-dimethyl-2,6-dinitroaniline and 3-(4-isopropylphenyl-1,1-dime thylurea as active ingredients. The blending ratio is 1-1,000pts.wt. any of the compounds of the latter based on 1pt.wt. compound shown by the formula and the blend is mixed with a diluent and used.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a compound represented by formula (I) (hereinafter referred to as compound (1)) and 5-
(4-chlorobenzyl)-N,N-diethylthiocarbamate (hereinafter referred to as compound (2)), α,α,α-trifluoro-2,6-sinitro-N,N-dipropyl-
para-toluidine (hereinafter referred to as compound (3)), N-
(1-ethylpropyl)3,4-dimethyl-2,6-dinitroaniline (hereinafter referred to as compound (4)) or 3
The present invention relates to a herbicidal composition containing as an active ingredient at least one selected from -(4-isopropylphenyl)=1,1-dimethylurea (hereinafter referred to as compound (5)).

[Conventional technology]

As a result of many years of research and development into herbicides, a wide variety of herbicides have been put into practical use, and these herbicides have contributed to labor-saving weed control operations and improved productivity of agricultural and horticultural crops. Even today, there is a demand for the development of new chemicals with better herbicidal properties, and in particular, as herbicides for agricultural and horticultural use, they are needed to selectively target only target weeds at low doses without causing harm to cultivated crops. Although it is desirable to control the insects, existing agents do not necessarily meet this requirement.

Compound (1) is highly effective against various weeds at lower doses than conventional herbicides, and is highly safe against wheat such as wheat, barley, and oats. In particular, it is extremely effective against broad-leaved weeds such as chickweed and grasshopper, which are a problem in the cultivation of wheat, but may be insufficiently effective against weeds of the Poaceae family.

On the other hand, conventionally known compounds (2), (3), (
4) or (5) has been used as a herbicide for wheat, mainly for controlling grass weeds. These are compound (1)
However, it has the disadvantage that it is used in a higher dosage than that of the conventional method, and it is not sufficiently effective against broad-leaved weeds, and improvement of these problems is desired.

[Aspects of the invention]

The present inventors conducted research in search of an improved herbicide for wheat that does not have these drawbacks, and found that compound (1), compound (2), compound (3), compound (4) or It has been found that when compound (5) is blended, a more excellent herbicidal effect can be obtained. That is, the present invention was completed based on the discovery that not only the respective herbicidal effects can be obtained simply additively, but also that a synergistic herbicidal effect appears. The composition of the present invention does not cause phytotoxicity to oats such as wheat, barley, and oats, and can completely control a wide variety of weeds from annual to perennial weeds at low dosages, thus demonstrating the usefulness of the present invention. is very large. Further, by the above-mentioned mixed application, it is possible to reduce the amount of compounds (1) to (5) contained in the composition of the present invention, and the usefulness of the present invention is extremely high.

Furthermore, the herbicide composition of the present invention is effective when treated before and after weed germination, and is highly effective when treated in soil or in both foliage and soil treatment. It is also useful for various crops other than wheat, and is useful for controlling various weeds in agricultural and horticultural fields such as fields and orchards, as well as in non-agricultural lands such as playgrounds, vacant lots, forest lands, tank yards, and railway edges. It can also be applied to
Shows great economic effect in weed control.

The composition according to the present invention contains 1 to 1 part by weight of any of compounds (2), (3), (4) and (5) per 1 part by weight of compound (1).
It is preferable to mix 1000 parts by weight, but it can be changed as appropriate depending on the type of weed to be controlled.

The treatment dosage of these mixtures will depend on a number of factors, such as the particular species of target plant whose growth is to be inhibited, but amounts of 1 to 100 g/a of active ingredient are usually suitable.

The compositions of the invention are preferably used in the form of a composition in which the active ingredient is mixed with a carrier consisting of a solid or liquid diluent. Preferably, the composition further comprises a surfactant.

When applying the composition of the present invention as a herbicide, a suitable carrier is generally used, such as a solid carrier such as clay, talc, bentonite, or diatom, or water, alcohols (methanol, ethanol, etc.), aromatic hydrocarbons (benzene, etc.). ,
It can be used in combination with liquid carriers such as chlorinated hydrocarbons (toluene, xylene, etc.), ethers, ketones, esters (ethyl acetate, etc.), acid amides (dimethylformamide, etc.), and can be applied as desired. Add emulsifiers, wetting agents, dispersants, binders, penetrants, spreading agents, stabilizers, etc.
It can be put to practical use in any dosage form such as emulsion, liquid, wettable powder, powder, granule, suspension, etc.

The synergistic herbicidal effect of herbicide mixtures can be explained as follows. That is, individual active compounds often exhibit drawbacks in their herbicidal activity, but in such cases, the herbicidal activity when two types of active compounds are combined is
When the activity of the two compounds is greater than the simple sum of their respective activities (expected activity), this is called synergism. The expected activity of a specific combination of two herbicides is
It can be calculated as follows.

(Colby S, R, Calculating synergistic and antagonistic reactions of herbicide combinations rWeed, Vol. 15, pp. 20-22, 19
67) That is, if the actual inhibition rate is greater than the above calculation, the combined activity can be said to exhibit synergism.

Hereinafter, the present invention will be explained in more detail with reference to Examples.
The compounds, dosage amounts, dosage forms, etc. in the present invention are not limited to the examples.

In addition, all "parts" mean parts by weight.

51 Examples of Ivy - Hydrating Agent Compound (1) -・-------・----
−1 part compound (2) −−−−−・・・−・−
---40 copies of Ziecrite-PSP・----
・−・・・・・−・−・−34 parts (Kaolin clay: Sieglite Industries ■Product name) Tsurupol 5039 −
----
−−−−・ 2nd part Carplex #80 −・・・・・−
...------- 18 parts or more (white carbon: Shionogi & Co., Ltd. brand name) or more are mixed and pulverized uniformly to make a wettable powder.

Hydrating agent compound (1) ・−・・−・−・−−−−1−・・ 1 part compound (3) −・・−・・−
・-・ 20 parts Sickleite-PSP・----
−・−・−1−−−−−−・−・・−67 parts (Kaolin clay: Sieglite Kogyo ■Product name) Tsurupol 50
39-・-・・・・・5 parts (
Alkyl ether sulfate: Toho Chemical ■Product name) Soybean oil −1−−−−−−−・−・−−−
---2nd section Carplex 1180 ------
----------------- 5 parts or more (white carbon: Shionogi & Co., Ltd. brand name) are uniformly mixed and pulverized to make a wettable powder.

Father Kinno l Hydrating compound (1) ・・−・・−・−−−−−・−
2-part compound (4) ---------・−・−・−
30 parts zi-crite-psp--・-1------
...--60 parts (kaolin clay:
Sieglite Industries ■Product name) Tsurupol 5039 ・-
・−・・−・・−−−−1−・・−・ 2 parts (alkyl ether sulfate: Toho Chemical ■trade name) Soybean oil −−−−1−−−−−−−−−
・・・・ 2nd part Carplex #80 −−−−−−
--------4 parts or more (white carbon: Shionogi & Co., Ltd. trade name) are uniformly mixed and pulverized to make a wettable powder.

Chikki Sarado Wettable powder compound (1) ・−・−・−−−−−−−−
−1 part compound (5) −−−−−−・−・・−
-----50 parts zicrite-psp・----1-
−−・〜−−−〜−−−・−・・・−41 parts (Kaolin clay: Sieglite Kogyo ■Product name) Tsurupol 50
39 −・−・−・−・−・・ 2 parts (alkyl ether sulfate: Toho Chemical ■trade name) Soybean oil ・−・−−−−−−−−−1−−
---・ Part 2 Carplex 1180 ------・
−・−・・−−−−−4 parts (white carbon: Shionogi & Co., Ltd. brand name) or more are uniformly mixed and pulverized to make a wettable powder.

Intoxication plan 1 Emulsion compound (1) -・------------1--
−・・ Part 1 compound (2),・・−・−・−・−・−
・−・−40 copies ・−・−−−
−−−−−−−−−−−−−−−−−−−・48 parts dimethylformamide−−−−−−−−−−−−−
−−−・5 parts soybean oil −−1−−−−−−
−−−−−−−−−−−−−・1 part vine pole 26
80 ・−・−・・−・−・−・−−−−−・ 5 parts (
Mixture of nonionic surfactant and anionic surfactant: Toho Chemical ■Product name) The above is mixed uniformly to form an emulsion.

m-inverted J-emulsion compound (1) =−・−−−−−−・−・−1
Compound (3) --------------・-・-
・-20 parts
−−−−−−−−−−−−−−−−・−68 parts dimethylformamide −−−−−−−−−・−・・−−−−−−
−・ 5 parts soybean oil −−−−−−−−−・・
−−−−−−1−・・・・・ 1 part Tsurupol 268 (
1-・----～-------・・--5 parts (mixture of nonionic surfactant and anionic surfactant: Toho Chemical ■trade name) Mix the above evenly. Make it into an emulsion.

Ku Kanehige Emulsion Compound (1)-----------・-・--・-・
2-part compound (4”) −−−−−−−−−−
・---30 parts xenon ・
−−−−−−−−−−−−−−−−−−・・−・−
57 parts dimethylformamide -------
−−−−−−−−・ 5 parts soybean oil −−−1−−−−−・−・−−1−−・・−・ 1 part Tsurupol 2680 ・−−−−−−−・−・・・・−・・−5
(Mixture of nonionic surfactant and anionic surfactant: Toho Chemical ■trade name) The above is mixed uniformly to form an emulsion.

Mochikin ■E Flowable agent compound (1)
------- Part 1 compound (5) -------
−・−−−−−−−−−−50 parts Tsurupol 3353
−・−−−−−1−−−・−・−・−・10 parts (nonionic surfactant: Toho Chemical ■trade name) Lunox 100
0 C-・-・・・・0.5 part (anionic surfactant: Toho Chemical ■trade name) 1% xanthan gum aqueous solution
−・・・・・ 20 parts (natural polymer) Water −−−−−1−−・−−−
---28, 5th part Tsurupol 3353, Lunox 10
0OC and 1% xanthan gum aqueous solution are uniformly dissolved, then compound (1) and compound (2) are added, stirred well, and wet-pulverized in a sand mill to obtain a flowable agent.

Weeding effect test by pre-germination treatment Put sterilized field soil in a plastic box measuring 30 cm long, 30 cm wide and 10 cm deep, and sow wheat, sycamore, chickweed, and japonica seeds in spots of approximately 0.5 cm. Covered with soil. On the day after sowing, each drug was uniformly sprayed so that the amount of active ingredient was a predetermined treatment amount. The chemical solution used for spraying was a wettable powder prepared according to the formulation example described above, diluted with water, and sprayed using a small sprayer. Twenty days after spraying the chemical solution, the above-ground plant weight of each weed was measured, and the suppression rate (%) was calculated using the following formula.

Table 1 shows the results of the herbicidal effect test of compounds (1) to (5) alone.

Table 2 shows the test results when compound (1) and any one of compounds (2) to (5) were mixed.

Table 1 Herbicidal effect of single agent (inhibition rate 1%) Table 2 Herbicidal effect and expected value of mixture (inhibition rate 1%) Compound (1) 10 Compound (2) Compound (1) 10 Compound (3) [ However, the numerical value in parentheses indicates the expected value obtained from the Colby equation. Further, symbols A to D indicate the following grass species. A:
Sparrow gnome, B: Chickweed, C Niyaemura, D=
wheat. ] Table 2 Herbicidal effect and expected value of mixture (inhibition rate 1%) (Continued) Compound (1) 10 Compound (4) Compound (1) 10 Compound (5) [However, the numbers in parentheses are Indicates the expected value obtained from the formula, and symbols A-D indicate the following grass species, A:
Sparrow gnome, B: Chickweed, C Niyaemura, D:
wheat. ] As is clear from the above results, the composition of the present invention has the formula (
The compound represented by I) and compounds (2) to (5) have greater synergistic herbicidal activity than the sum of the herbicidal activities of each single agent, and can selectively target target weeds at a low dose. can be prevented.

Patent applicant: Nissan Chemical Industries, Ltd.

Claims (1)

[Claims] Formula (I): ▲There are mathematical formulas, chemical formulas, tables, etc.▼A compound represented by (I) and S-(4-chlorobenzyl)-N,
N-diethylthiocarbamate, α,α,α-trifluoro-2,6-dinitro-N,N-dipropyl-para-
At least one selected from toluidine, N-(1-ethylpropyl)3,4-dimethyl-2,6-dinitroaniline, or 3-(4-isopropylphenyl)-1,1-dimethylurea. A herbicide composition containing as an ingredient.