CN109566611B

CN109566611B - Weeding composition and preparation method and application thereof

Info

Publication number: CN109566611B
Application number: CN201811624735.6A
Authority: CN
Inventors: 胡恒宇
Original assignee: Linyi University
Current assignee: Linyi University
Priority date: 2018-12-28
Filing date: 2018-12-28
Publication date: 2021-02-02
Anticipated expiration: 2038-12-28
Also published as: CN109566611A

Abstract

The application discloses a weeding composition and a preparation method and application thereof, and relates to the technical field of weeding. The weeding composition comprises effective components and an auxiliary agent; the effective components comprise pendimethalin and oxadiazon, and the auxiliary agent is selected from one or more of citric acid alkyl ether ester, esterified polyoxyethylene glycerol or alcohol ether glucoside, preferably esterified polyoxyethylene glycerol. According to the invention, the addition agent is added to esterify the polyoxyethylene glycerol when the pendimethalin and the oxadiazon are used in a compound way, so that the weeding effect of the pendimethalin and the oxadiazon is improved, the antagonism of the pendimethalin and the oxadiazon in the process of preventing and controlling weeds abutilon is relieved, and a certain synergistic effect is generated in the process of preventing and controlling abutilon. The invention has very important significance for enhancing the control effect of the herbicides pendimethalin and oxadiazon.

Description

Weeding composition and preparation method and application thereof

Technical Field

The invention relates to the technical field of weeding, in particular to a weeding composition and a preparation method and application thereof.

Background

The compound use of the herbicide means that the herbicide or the auxiliary agent with different action types or effective components is mixed and used according to a certain proportion in the application of the herbicide, and the effect of expanding the weed control spectrum can be achieved on the premise of keeping higher pesticide effect. 1, the control effect and the weed control spectrum are obviously improved, and the dosage is reduced compared with that of single use; 2. the negative influence on the environment is reduced, meanwhile, the dosage of a single herbicide is reduced, the generation of weed resistance is delayed to a certain extent, the crop yield is increased, and the pesticide residue is reduced; 3. the influence of the herbicide on the structure and distribution of the peripheral biological population is reduced. Therefore, the compound use of the herbicide is an efficient and environment-friendly utilization mode of the existing herbicide, and plays an important role in the sustainable development of agriculture.

Studies have shown that different herbicides may interact before and after entering the plant, and that the result of such interaction may be synergistic, antagonistic or additive.

The herbicide assistant has the functions of promoting the diffusion and absorption of herbicide, resisting rain wash, resisting photolysis, compatibility, deposition, resisting drift, defoaming, regulating water quality, etc. The auxiliaries can be classified into multipurpose type conditioning auxiliaries and activating auxiliaries according to the use. The multipurpose conditioning aids generally do not directly affect the efficacy of the agents, but indirectly enhance the efficacy of the herbicide by affecting the properties of the spray solution or mixture, eliminating or reducing the adverse effects of the spraying process, including the following types: compatibility agent, defoaming agent, drift control agent, deposition agent and water quality regulator. The activating assistant can improve the efficiency of the herbicide through the comprehensive action of the assistant, the herbicide, weeds and environmental conditions. Adjuvants for herbicides are disclosed in patent application CN106417287A, which include alkyl polyglycosides, alkyl ether esters of citric acid, quaternary ammonium glucosides, methylated polyoxyethylene fatty acids, esterified polyoxyethylene glycerol.

Disclosure of Invention

The invention aims to provide a weeding composition and a preparation method and application thereof, wherein the weeding composition is added with an auxiliary agent esterified polyoxyethylene glycerol, the auxiliary agent can effectively relieve the antagonism of pendimethalin and oxadiazon for preventing and controlling weeds and abutilon, and compared with other auxiliary agents, the weeding composition has unexpected technical effects.

In order to achieve the above purposes, the technical scheme adopted by the invention is as follows:

the invention provides a weeding composition, which comprises effective components and an auxiliary agent; the active ingredients comprise pendimethalin and oxadiazon, and the auxiliary agent is one or more selected from citric acid alkyl ether ester, esterified polyoxyethylene glycerol or alcohol ether glucoside.

The pendimethalin is N- (1-ethyl propyl) -2, 6-dinitro-3, 4-dimethylaniline; the oxadiazon is 5-tert-butyl-3- (2, 4-dichloro-5-isopropoxyphenyl) -1,3, 4-oxadiazoline-2-one.

Preferably, the adjuvant is selected from esterified polyoxyethylene glycerol.

Specifically, in the weeding composition, the weight ratio of the pendimethalin to the oxadiazon to the auxiliary is (1-5):1, and preferably 2:2: 1.

Specifically, the dosage form of the weeding composition is wettable powder, granules, water aqua, missible oil, suspending agent, oil suspending agent, microcapsule, microemulsion, aqueous emulsion, suspending emulsion or water dispersible granules.

The invention protects the application of any one of the weeding compositions in weed control.

In the above application, the weeds are grassy weeds, and/or broadleaf weeds;

the grassy weeds are preferably crabgrass and/or cockspur grass, and the broadleaf weeds are preferably purslane and/or abutilon.

The invention also provides a method for preventing and controlling abutilon, which comprises the step of preventing and controlling abutilon by any one of the weeding compositions.

In the above method, comprising the step of applying any one of the above herbicidal compositions to the growth plot, leaf, or stem of abutilon.

The actual using amount of the weeding composition is determined according to the development period of piemarker, the drug resistance of target crops and other specific conditions. Piemarker is early in development period, the target crop has poor drug resistance, and the practical use amount of the weeding composition is low; the development period of piemarker is later, the drug resistance of the target crops is stronger, and the practical use amount of the weeding composition is higher.

The invention also provides a method for preparing the weeding composition, which comprises the step of mixing the effective components and the auxiliary agent.

The invention has the following beneficial effects:

the addition agent is added to esterify the polyoxyethylene glycerol when the pendimethalin and the oxadiazon are used in a compound mode, so that the weeding effect of the pendimethalin and the oxadiazon is improved, the addition agent can effectively relieve the antagonism of the pendimethalin and the oxadiazon in the prevention and treatment of weeds abutilon, and a certain synergistic effect is generated in the prevention and treatment of abutilon. The invention has very important significance for enhancing the control effect of the herbicides pendimethalin and oxadiazon.

Detailed Description

The experimental procedures used in the following examples are all conventional procedures unless otherwise specified.

Materials, reagents and the like used in the following examples are commercially available unless otherwise specified.

Example 1 herbicidal composition, preparation method and application thereof

First, liquid medicine preparation

Diluting 33% pendimethalin emulsifiable concentrate by 100 times with water to obtain a liquid medicine 1;

diluting 25% oxadiazon emulsifiable concentrate with water by 400 times to obtain a liquid medicine 2;

diluting 33% pendimethalin missible oil and 25% oxadiazon missible oil with water respectively to obtain mother liquor with equal concentration, mixing the two mother liquors according to equal volume, and diluting with water to spraying concentration to obtain liquid medicine 3;

adding an auxiliary agent of citric acid alkyl ether ester into the liquid medicine 3, and uniformly mixing to ensure that the weight ratio of the pendimethalin to the oxadiazon to the citric acid alkyl ether ester is 1:1:0.5, so as to obtain liquid medicine 4;

adding an auxiliary agent esterified polyoxyethylene glycerol into the liquid medicine 3, and uniformly mixing to ensure that the weight ratio of the pendimethalin to the oxadiazon to the esterified polyoxyethylene glycerol is 1:1:0.5, so as to obtain liquid medicine 5;

adding an auxiliary agent of alcohol ether glucoside into the liquid medicine 3, and uniformly mixing to ensure that the weight ratio of the pendimethalin to the oxadiazon to the alcohol ether glucoside is 1:1:0.5, thus obtaining a liquid medicine 6.

Second, controlling weeds in sunflower field

Liquid medicines 1-6 (different treatments) are respectively and uniformly sprayed in different plots of a field of the sunflowers in the saline-alkali soil before the sunflowers are sown, the safety of the sunflowers is evaluated 25 days after the application of the liquid medicines by taking equal amount of sprayed clear water (CK) as a control, the fresh weight control effect of weeds including digitaria sanguinalis, cockspur grass, purslane and piemarker in the field of the sunflowers is investigated 60 days after the application of the liquid medicines, the test is carried out by random block arrangement and repeated three times, the results are averaged, and the results are shown in table 1.

TABLE 1 control of herbicidal compositions in sunflower field weeds

Note that in table 1, a represents pendimethalin, B represents oxadiazon, and Z represents an auxiliary agent, such as alkyl ether citrate, esterified polyoxyethylene glycerol, or alcohol ether glycoside.

In table 1, the results of treatments 1 to 3 show that the effect of pendimethalin and oxadiazon on abutilon is low, namely 25.4% and 31.3%, when pendimethalin and oxadiazon are used in a compound mixture, the effect on crab grass, barnyard grass and purslane is improved, the effect on abutilon is reduced, the effect on crab grass, barnyard grass and purslane is enhanced, and when pendulous prevention and control are carried out, the effect on abutilon is generated.

While various herbicides have been shown to produce antagonism, the addition of suitable adjuvants has been found to alleviate this antagonism, and the inventors have tried various adjuvants against the antagonism of pendimethalin and oxadiazon against abutilon, including alkyl ether citrate, esterified polyoxyethylene glycerol and alcohol ether glycosides.

The results of the treatment of 4-6 show that after three auxiliary agents, namely alkyl ether ester citrate, esterified polyoxyethylene glycerol or alcohol ether glucoside, are added into the pendimethalin and oxadiazon compound liquid medicine, a small amount of improvement effect is achieved on the control of crab grass, barnyard grass and purslane; in the process of controlling abutilon, the auxiliary agent esterified polyoxyethylene glycerin not only relieves the antagonism of the compound of pendimethalin and oxadiazon to the abutilon control, but also has synergism to the abutilon control, and the citric acid alkyl ether ester and alcohol ether glycoside have no relieving effect on the antagonism.

Sunflower safety results: the sunflower plants have no abnormal phenomena of leaf burn, yellowing, withering and the like, and the dosage of the medicament shown in the table 1 is safe for the sunflower.

Those not described in detail in this specification are within the skill of the art. The above description is illustrative of the present application and is not to be construed as limiting the present application. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.

Claims

1. A herbicidal composition characterized by: comprises effective components and auxiliary agents; the effective components comprise pendimethalin and oxadiazon, and the auxiliary agent is selected from esterified polyoxyethylene glycerol.

2. A herbicidal composition according to claim 1, characterized in that: the weight ratio of the pendimethalin to the oxadiazon to the auxiliary agent is (1-5): 1.

3. A herbicidal composition according to claim 2, characterized in that: the weight ratio of pendimethalin to oxadiazon to the auxiliary is 2:2: 1.

4. A herbicidal composition according to claim 1, characterized in that: the dosage form of the weeding composition is wettable powder, granules, water aqua, missible oil, suspending agent, oil suspending agent, microcapsule, microemulsion, emulsion in water, suspending emulsion or water dispersible granules.

5. Use of the herbicidal composition according to any one of claims 1 to 4 for controlling weeds.

6. The use of claim 5, wherein: the weeds are grassy weeds and/or broadleaf weeds.

7. The use of claim 6, wherein the grassy weeds are large crabgrass, and/or cockspur grass, and the broadleaf weeds are purslane, and/or abutilon.

8. A method for preventing and treating piemarker is characterized in that: comprising the step of controlling abutilon using the herbicidal composition as claimed in any one of claims 1 to 4.

9. The method of claim 8, wherein: the method comprises the step of applying the herbicidal composition according to any one of claims 1 to 4 to the growing field, leaves or stems of abutilon.

10. A process for preparing a herbicidal composition as claimed in any one of claims 1 to 4, characterized in that: the method comprises the step of mixing the active ingredient and the auxiliary agent.