CN1568691A - Weed removal composition containing security agent - Google Patents

Abstract

The invention discloses a herbicidal composition containing a safener. The composition is based on 3-methyl-2-[5-(2-chloro-4-trifluoromethylphenoxy)-2-nitrobenzoyl]-3-butenoic acid ethyl ester (SYP- 249) is a pesticide formulation composed of an active ingredient of a herbicide and a herbicide safener—one of fencloxen, mefenpyr-ethyl, dichlorallylamine or brassinolide. The usual preparation methods are used to process and prepare emulsifiable concentrates, suspensions (emulsions), water emulsions, microemulsions, water dispersible granules, and wettable powders. Using the composition to treat the stems and leaves of wheat and its growth places can reduce the damage of herbicides to wheat without affecting its control effect on weeds.

Description

A kind of herbicidal composition containing safener

technical field

The present invention belongs to the field of herbicides. It relates to a herbicidal composition containing a safener.

Background technique

Chemical herbicides are easy to cause damage to the crops that people need while eliminating weeds. For the herbicidal composition, one of the most important requirements is its selectivity, that is, it only acts on the target, and does not affect the crops that do not affect. crops grow.

3-methyl-2-[5-(2-chloro-4-trifluoromethylphenoxy)-2-nitrobenzoyl]-3-butenoic acid ethyl ester (test code SYP-249) is A broad-spectrum herbicide has the characteristics of fast herbicidal speed and herbicidal activity for soil and stem and leaf treatment. The preparation and application of its compound have been disclosed in the Chinese invention patent application CN1325624A. Further studies have found that the herbicide has an excellent herbicidal effect on broad-leaved weeds, but it tends to cause greater damage to cultivated crops such as wheat when used in high doses.

Contents of the invention

For truly selective weed control, mitigating 3-methyl-2-[5-(2-chloro-4-trifluoromethylphenoxy)-2-nitrobenzoyl]-3-butenoic acid Ethyl ester (SYP-249) causes damage to wheat during use, the invention provides a new herbicide composition containing herbicide safener, this herbicide composition can not only keep the original herbicide to control weeds It can significantly reduce or even eliminate the phytotoxicity of cultivated crops such as wheat.

Herbicidal composition active ingredient of the present invention is:

3-Methyl-2-[5-(2-chloro-4-trifluoromethylphenoxy)-2-nitrobenzoyl]-3-butenoic acid ethyl ester

Molecular formula: C ₂₁ H ₁₇ ClF ₃ N, relative molecular weight: 375.8

Herbicide safeners are selected from any of the following:

1) Metoxazole

1-(2,4-dichlorophenyl)-5-trichloromethyl-1H-1,2,4-triazole-3-carboxylic acid ethyl ester (fenchlorazole);

2) pyraclofen-ethyl

(RS)-1-(2,4-dichlorophenyl)-5-methyl-2-pyrazoline-3,5-dicarboxylic acid diethyl ester (mefenpyr-diethyl);

3) Allyl dichloride

N,N-diallyl-2,2-dichloroacetamide (dichlormid); or

4) Brassinolide

2α, 3α, 22(R), 23(R)-tetrahydroxy-24(S)-methyl-β-homo-7-oxa-5α-cholestan-6-one (brassinolide).

In the herbicidal composition proposed by the present invention, the appropriate ratio by weight of herbicidal active ingredients and safener is 10:1-1:2. Tests have shown that when the herbicidal active ingredient changes within the effective amount range, further increasing the ratio of the safener in the composition will not affect the herbicidal effect. The meaning of a herbicidally effective amount is well known to those skilled in the art.

The weight percent content of the active component in the herbicidal composition of the present invention is 1-90%, preferably 5% to 85%. Depending on the type of preparation, the content range of the active ingredient is different. Generally, liquid preparations contain 1-70% by weight active substance, preferably 5-40%; solid preparations contain 5% to 85% by weight active substance, preferably 10-40%; suspension The formulations contain 10-60% by weight of active substance, preferably 5-35%.

The invention also includes the preparation of herbicidal compositions containing safeners. The herbicidal composition containing safener of the present invention also contains at least one liquid diluent or solid carrier and surfactant, so as to facilitate the dispersion of active ingredients in water during application, and to facilitate correct application to plants. According to needs, the herbicidal composition containing safener of the present invention can be made into formulations such as emulsifiable concentrate, water emulsion, microemulsion, suspension or suspoemulsion, wettable powder, water dispersible granule or liquid. The preparation methods of the above formulations are well known to those skilled in the art, and there is no special requirement on the order of adding the herbicide safeners.

The solid carrier used in the herbicidal composition formulation of the present invention has diatomaceous earth, white carbon black, bentonite, hexamethylenediamine, kaolin, etc.; the used liquid diluent has water, methanol, ethanol, toluene, xylene, N, N-dimethylformamide, acetonitrile, ethylene glycol, ethyl acetate and other solvents; the surfactants used are sodium lignosulfonate, phenylethylphenol polyoxyethylene ether, Nongru OX-2681, Nongru OX- 8686, agricultural milk 2201, agricultural milk 600, agricultural milk 700 ^# , agricultural milk NP-10, agricultural milk 0203B, agricultural milk 507 ^# , agricultural milk NP10, methylnaphthalenesulfonic acid formaldehyde condensate, naphthalenesulfonic acid sodium formaldehyde condensate , magnesium aluminum silicate, polyvinyl alcohol, alkyl aryl formaldehyde resin polyoxyethylene ether, diphenylphenol-based polyoxyethylene (n ₁₈ ) ether formaldehyde condensate, etc.

The present invention also includes a method of using the herbicidal composition containing a safener: applying a herbicidally effective amount of the herbicidal composition of the present invention to weeds or the growth medium or site of the weeds.

Use of the herbicidal composition of the present invention for controlling weeds in wheat fields and reducing damage to crops. The herbicidal composition can obviously reduce the phytotoxicity of its active ingredients on wheat seedling stage; and with the increase of safener dose within a certain range, the safety to wheat can be obviously improved.

As can be seen from the test results, when 3-methyl-2-[5-(2-chloro-4-trifluoromethylphenoxy)-2-nitrobenzoyl]-3-butenoic acid ethyl ester When (SYP-249) is used alone, the phytotoxicity can reach 5%-20% at the dose of 75-300 g ai/ha, and the phytotoxicity can reach 35% at the highest dose (600 g ai/ha). The application of the herbicidal composition of the present invention can reduce the damage to wheat without affecting the control effect on weeds. For example, when SYP-249 is added with the ratio of clofenac or mefenpyr-ethyl at a ratio of 2:1 to 1:2, the phytotoxicity to wheat can be significantly reduced: at the highest dose (600g ai/ha), the phytotoxicity is only It is 10%, and there is no phytotoxicity to wheat under the dosage of 75～300gai/ha.

Detailed ways

The following specific examples illustrate the present invention in detail, but the present invention is by no means limited to these examples. All data in the formula are percentages by weight. In the example, the herbicidal active ingredient [3-methyl-2-[5-(2-chloro-4-trifluoromethylphenoxy)-2-nitrobenzoyl]-3-butenoic acid ethyl ester was tested Code-named SYP-249 said. Adjustments made according to specific conditions during actual operation

and supplements should be understood as part of the present invention.

Example 1 (10% EC)

SYP-249 10%

Cloxacil 5%

Agricultural Milk OX-2681 7.5%

Agricultural Milk OX-8686 4.5%

Methanol 8%

Xylene Make up to 100%

Example 2 (15% soluble liquid)

SYP-249 15%

Allyl dichloride 15%

0203B 4%

NP10 4%

OX-2681 2%

N,N Dimethylformamide 12%

Methanol 4%

Water up to 100%

Example 3 (30% water dispersible granules)

SYP-249 30%

Brassinolide 15%

Sodium Lignosulfonate 2%

Methylnaphthalenesulfonic acid formaldehyde condensate 25%

Hexamethylenediamine 4.5%

Bentonite Supplement to 100%

Example 4 (30% suspending agent)

SYP-249 30%

Cloxacil 15%

Sodium naphthalenesulfonate formaldehyde condensate 5%

White carbon black 0.1%

Magnesium Aluminum Silicate 0.1%

Ethylene Glycol 4%

Bubble Enemy A Little

Water make up to 100%

Example 5 (8% water emulsion)

SYP-249 8%

Metrafenpyr 8%

Polyvinyl alcohol 0.9%

Alkylaryl formaldehyde resin polyoxyethylene ether 12.5%

Farm Milk 507 ^# 10%

Dimethylformamide 13%

Ethylene Glycol 5%

Water make up to 100%

Example 6 (10% microemulsion)

SYP-249 10%

Metrafenpyr 5%

Diphenylphenol-based polyoxyethylene (n ₁₈ ) ether

Formaldehyde condensate 6%

Acetonitrile 10%

Ethyl acetate 8%

Agricultural Milk 2201 16.8%

Farm Milk 700 ^# 5.2%

Ethylene Glycol 5%

Water make up to 100%

Example 7 (15% suspending agent)

SYP-249 15%

Cloxacil 30%

Methylnaphthalenesulfonic acid formaldehyde condensate 2.8%

White carbon black 0.1%

Xanthan Gum 0.1%

Ethylene Glycol 4%

Bubble Enemy A Little

Water make up to 100%

Biotest example

Test method: Sow quantitative seeds of wheat, velvetleaf and cocklebur in disposable paper cups with a diameter of 8 cm. After covering with soil, place them in a greenhouse for cultivation, and set 3 repetitions for each treatment. After the emergence of wheat at the 2-leaf stage, 1 true leaf of velvetleum and 2 true leaves of cocklebur, the seedlings are thinned out. In each paper cup, 5 wheat plants, 3 plants of velvetleum and 3 plants of cocklebur are selected to continue To cultivate. At the 3-leaf stage of wheat, 2 true leaves of velvetleum and 4 true leaves of Xanthium annulus, spray the stems and leaves on the crawler crop sprayer according to the dose designed in the experiment. After the treatment, the control effect on weeds and the safety on crops of the herbicide composition containing the antidote are regularly observed. After 15 days, visually observe the control effect of each treatment on weeds and the safety of wheat, and the results are listed in Table 1 and Table 2 below.

Table 1. Control effect on weeds and safety on wheat after adding safener potion dose Visual control effect on weeds (%) Visual Inhibition Rate of Wheat gai/hm ² Abutilon Cocklebur 10% SYP-249 EC 150 95 98 10 10% SYP-249 EC 300 100 100 20 10% SYP-249 EC 600 100 100 35 Example 1 150+75 95 98 0 Example 1 300+150 100 100 0 Example 4 300+150 100 100 0 Example 6 300+150 100 100 5 Example 5 300+300 100 100 0 Example 5 600+600 100 100 5

Table 2. Control effect on weeds and safety on wheat after adding safener potion dose Visual control effect on weeds (%) Visual inhibition rate to wheat (%) gai/hm ² Abutilon Cocklebur SYP-249 75 75 80 5 150 95 98 10 300 100 100 20 600 100 100 35 SYP-249+Cloxazole 75+7.5 75 80 0 150+15 95 98 5 300+30 100 100 10 SYP-249+Cloxazole 75+37.5 75 80 0 150+75 95 98 0 300+150 100 100 0 600+300 100 100 8 SYP-249+Cloxazole 75+75 75 80 0 150+150 98 100 0 300+300 100 100 0 600+600 100 100 5 SYP-249+Cloxazole 75+150 75 80 0 150+300 98 100 0 300+600 100 100 0 600+1200 100 100 5 SYP-249+ mefenpyr-ethyl 75+7.5 75 80 0 150+15 95 98 5 300+30 100 100 10 SYP-249+ mefenpyr-ethyl 75+37.5 75 80 0 150+75 95 98 0 300+150 100 100 5 600+300 100 100 10

SYP-249+ mefenpyr-ethyl 75+75 75 80 0 150+150 98 100 0 300+300 100 100 0 600+600 100 100 5 SYP-249+ mefenpyr-ethyl 75+150 75 80 0 150+300 98 100 0 300+600 100 100 0 600+1200 100 100 5 SYP-249+dichloroallylamine 75+7.5 75 80 0 150+15 95 98 5 300+30 100 100 15 SYP-249+dichloroallylamine 75+37.5 75 80 0 150+75 95 98 5 300+150 100 100 10 SYP-249+dichloroallylamine 75+75 75 80 0 150+150 98 100 0 300+300 100 100 10 SYP-249+dichloroallylamine 75+150 75 80 0 150+300 98 100 0 300+600 100 100 8 SYP-249+ Brassinolide 75+7.5 75 80 5 150+15 95 98 10 300+30 100 100 15 SYP-249+ Brassinolide 75+37.5 75 80 0 150+75 95 98 5 300+150 100 100 10 SYP-249+ Brassinolide 75+75 75 80 0 150+150 95 98 5 300+300 100 100 10 SYP-249+ Brassinolide 75+150 75 80 0 150+300 95 98 5 300+600 100 100 10

Claims (7)

1. A herbicidal composition containing 3-methyl-2-[5-(2-chloro-4-trifluoromethylphenoxy)-2-nitrobenzoyl]-3-butanol as herbicidal active ingredient Ethyl enoate and any one of the following herbicide safeners - fencloxen, mefenpyr, dichloroallylamine or brassinolide, and an appropriate amount of agriculturally acceptable surfactants and solid carriers or liquid diluent. 2. The herbicidal composition according to claim 1, characterized in that the weight ratio of the herbicidal active ingredient to the safener is 10:1-1:2. 3. The herbicidal composition according to claim 1 or 2, characterized in that the herbicidal active ingredient in the composition is 1-90% by weight. 4. The herbicidal composition according to claim 3, characterized in that the composition can be formulated into any agriculturally acceptable formulation. 5. The herbicidal composition as claimed in claim 4, characterized in that: the dosage form of the preparation is emulsifiable concentrate, suspension (emulsion), water emulsion, microemulsion, wettable powder or water dispersible granule. 6. A method of controlling weeds, characterized by applying a herbicidally effective amount of the herbicidal composition as claimed in claim 1 to the weeds or the growth medium or locus of the weeds. 7. Use of the herbicidal composition according to claim 1 for controlling weeds in wheat fields and reducing damage to crops.