CN104222127A - Weeding composition - Google Patents

Abstract

The invention discloses a herbicidal composition and its application, comprising two active ingredients: active ingredient a and active ingredient b, wherein the active ingredient a is chlorpyrazosulfuron-methyl, and the active ingredient b is quizalofop-p-ethyl, high-efficiency flurpirin One of methoxyfop and clethodim, the weight ratio of active ingredient a to active ingredient b is 1:10-10:1, preferably the weight ratio is 1:3-3:1, the two kinds of effective The weight percentage of the total weight of the components in the composition is 1-90%; the present invention is used to prevent and control farmland weeds, and the control effect of the present invention is significantly improved compared with a single dose, reducing the dosage of pesticides and reducing the impact of pesticides on the environment. The adverse effects of the environment; the comprehensive management of weed resistance is of great significance and has huge economic and social benefits.

Description

a herbicidal composition

technical field

The present invention relates to an agricultural herbicidal composition.

Background technique

Chemical weed control is one of the main means of weed control in farmland, and the use of a single compound herbicide can easily lead to weed resistance. At the same time, when weeds occur in farmland, the grass phase is complex, grass weeds, broad-leaved weeds and other types of weeds are mixed, and the use of a single type of compound herbicide will show some defects and limitations, which cannot be completely solved. Farmland weeds. The combination of different types of compound herbicides can expand the herbicidal spectrum, improve the actual effect, delay weed resistance, and save time and labor.

Clopyrazosulfuron-methyl is a sulfonylurea compound, which is absorbed by weeds and then transferred to the plant, hindering the synthesis of amino acids, rapidly inhibiting the growth of weed stems and leaves and the extension of roots, and then completely withered.

Quizalofop-p-ethyl is a phenoxycarboxylic acid compound, which is absorbed through the stems and leaves of weeds, conducts upwards and downwards in the plant body, accumulates in the top and intermediate meristems, inhibits the synthesis of fatty acids in cells, and causes weeds to die. Jinghe grass is a new type of high-speed and selective dry field stem and leaf treatment agent. It has high selectivity between grass weeds and dicotyledonous crops, and has a good control effect on grass weeds on broad-leaved crops. .

High-efficiency haloxyfop-op is a phenoxycarboxylic acid compound, which is quickly absorbed by grasses and transmitted to the entire plant, inhibiting plant meristems and killing grasses. It has a good control effect on annual and perennial grass weeds from post-emergence to division and early heading.

Clethodim belongs to the cyclohexenone compound, which is rapidly absorbed by the leaves after the treatment of the stems and leaves, and then transmitted to the meristems. It works by inhibiting the biosynthesis of branched-chain fatty acids and flavonoids in sensitive plants, causing cell division to be blocked. Destroys and inhibits the activity of plant meristems, delays plant growth, chlorosis and necrosis, and then leaves burn and dry up and die. It is effective for most annual and perennial grass weeds.

The present inventor has carried out in-depth research on the mixing of chlorpyrazosulfuron-methyl and quizalofop-ethyl or high-efficiency haloxyfop or clethodim, and on the basis of a large number of indoor formula screening tests and field efficacy tests, it is found that It shows obvious synergistic effect on weeds in a certain mixing ratio range, and the invention is completed after further research.

Contents of the invention

The object of the present invention is to solve the problems of single herbicide spectrum and poor actual control effect in the prior art, and provide a herbicide composition with wide spectrum and high efficiency.

Another object of the present invention is to apply the composition to control annual weeds in farmland.

Technical solution: To achieve the above object, the present invention provides a herbicidal composition comprising two active ingredients: active ingredient a and active ingredient b, wherein active ingredient a is chlorpyrazosulfuron-methyl, and active ingredient b is quizalofop-ethyl , one of high-efficiency haloxyfop and clethodim, the weight ratio of active ingredient a to active ingredient b is 1:10-10:1, and the preferred weight ratio is 1:3-3:1 The weight percentage of the sum of the weights of the two active ingredients in the composition is 1-90%, and the balance is agriculturally acceptable pesticide adjuvants.

The herbicidal composition can be formulated into application forms suitable for agricultural use, such as oil floating agent, wettable powder, water dispersible granule, etc. according to methods known to those skilled in the art.

The herbicidal composition also contains agriculturally acceptable pesticide adjuvants required for the preparation of pesticide formulations, selected from solvents, emulsifiers, wetting agents, stabilizers, dispersants, penetrating agents, thickeners, defoamers , antifreeze, disintegrants, binders, fillers, carriers, media, and surfactants, all of which are known substances and are various auxiliaries commonly used in pesticide preparations. It can be changed and is not particularly limited.

The production techniques of the various dosage forms of the herbicidal composition belong to the prior art and will not be repeated here.

The herbicidal composition provided by the present invention is usually used by spraying with water, and other agricultural application techniques can also be used as required.

The herbicidal composition provided by the invention is used for controlling annual weeds in farmland.

Technical source of the present invention: In order to further understand the joint effect between the herbicidal active ingredients of the present invention, the inventors combined chlorpyrazosulfuron-methyl with quizalofop-p-ethyl, high-efficiency haloxyfop, and clethodim respectively. An indoor formulation screening test was carried out.

experiment material:

The seeds of Echinochloa crusgalli, Polygonum lapathifolium and Cyperus difformis were collected from Laokeng Village, Renshan Town, Huidong County, Guangdong Province.

Test equipment: controllable light incubator; POTTER precision laboratory spray tower; electronic balance (sensitivity 0.1mg); micropipette gun, etc.

Test method: Put a certain amount of soil in a porcelain bowl with a height of 6cm and a diameter of 9cm, sow 15 seeds of the target weed in the porcelain bowl, cover with 0.5-1cm of fine soil, and then cultivate it in a greenhouse. When the target weeds sprout Carry out soil spraying treatment, spray 1ml per porcelain pot quantitatively, repeat each treatment 4 times, and set the treatment without pesticide as the control, after the treatment, the test materials are placed in the greenhouse for cultivation, and the growth of the target weeds is regularly observed, visually inspected after 15 days The symptoms of target damage and growth inhibition, and the fresh weight of the weeds, were used to evaluate the toxic effect of the agent on the target weeds by the inhibition rate of the target fresh weight.

After 15 days of test treatment, visually observe the damage symptoms and growth inhibition of the target, weigh the fresh weight of the aerial part, and calculate the fresh weight inhibition rate (%).

According to the Gowing method to evaluate the combination of herbicides (NY/T 1155.7-2006), the formula is as follows:

E ₀ ﹦X﹢Y–XY/100.

In the formula, X is the fresh weight inhibitory rate of active ingredient A to target weeds when a certain dose is used alone; Y is the fresh weight inhibitory rate of active ingredient B to target weeds when a certain dose is used alone; E0 is active ingredient A, activity The theoretical value of the inhibitory rate of the fresh weight of the target weeds when the two agents of component B are mixed; E is the measured value of the inhibitory rate of the fresh weight of the target weeds when the two agents of active ingredient A and active ingredient B are mixed.

Evaluation criteria: when E-E ₀ >10%, it is synergistic; when -10%≤E-E ₀ ≤10%, it is additive; when E-E ₀ <-10%, Shown as antagonism.

All experimental data were analyzed using DPS v14.10 statistical software.

The measurement results are shown in Table 1, Table 2 and Table 3. The results show that the active ingredient a of the present invention is combined with the active ingredient b, E-E ₀ > 10% or -10% ≤ E-E ₀ ≤ 10%, showing synergy Or additive effect, the combination of active ingredient a and active ingredient b is reasonable.

Table 1. Determination results of the combined action of chlorpyrazosulfuron-methyl and quizalofop-p-ethyl on weeds.

Table 2. Determination results of the joint action of the combination of chlorpyrazosulfuron-methyl and high-efficiency haloxyfop-methyl on weeds.

Table 3. Determination results of combined action of chlorpyrazosulfuron-methyl and clethodim on weeds.

Detailed ways

In order to make the purpose, technical solutions and advantages of the present invention more concise and clear, the present invention is described with the following specific examples, but the present invention is by no means limited to these examples. The following descriptions are only preferred embodiments of the present invention, and are only used to describe the present invention, and should not be construed as limiting the scope of the present invention. It should be noted that any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention shall be included within the protection scope of the present invention. Therefore, the protection scope of the patent for the present invention should be based on the appended claims.

Example 1.

Preparation method of 20% clopyrazosulfuron-methyl quizalofop-p-ethyl wettable powder: coarsely pulverize the following materials according to the proportion, put them into the mixer and mix them evenly, and then make 20% clopyrazosulfuron-methyl after 2 times of jet pulverization Long quizalofop-ethyl wettable powder.

Example 2.

Preparation method of 30% chlorpyrazosulfuron-high-efficiency haloxyfop oil suspension concentrate: the following materials are pre-crushed in proportion, then added to a sand mill for grinding, and prepared after high-shear mixing to obtain 30% chlorine Pyrazosulfuron-ethyl high-efficiency fluroxyfop oil suspension concentrate.

Example 3.

The preparation method of 60% chlorpyrazosulfuron-clethodim water-dispersible granules: the following active ingredients and additives are mixed and kneaded with water, kneaded and shaped with a kneading granulator, and then the granules are fluidized After drying and sieving, 60% chlorpyrazosulfuron-clethodim water-dispersible granules can be prepared.

Example 4: Field efficacy test on controlling annual weeds in tomato fields.

Test agent and dosage:

(1#) 20% chlorpyrazosulfuron-methyl · quizalofop-ethyl wettable powder (10% chlorpyrazosulfuron-methyl; 10% quizalofop-ethyl), 667m ² active ingredient dosage 6 grams.

(2#) 30% chlorpyrazosulfuron-methyloxyfop-ethyl oil suspension concentrate (clorazosulfuron-methyl 10%; methoxyfop-methyl 20%), 667m ² active ingredient dosage 6 grams.

(3#) 60% chlorpyrazosulfuron · clethodim granules (clorazosulfuron-methyl 40%; clethodim 20%), 667m ² active ingredient dosage 6 grams.

(4#) 75% chlorpyrazosulfuron-methyl water-dispersible granules, 667m ² active ingredient dosage 5 grams.

(5#) 15% quizalofop-p-ethyl emulsifiable concentrate, 667m ² active ingredient consumption 5 grams.

(6#) 10.8% high-efficiency haloxyfop emulsifiable concentrate, 667m ² active ingredient dosage 4 grams.

(7#) 24% clethodim emulsifiable oil, 667m ² active ingredient consumption 4 grams.

(8#) Artificial weeding.

Test time: the application time was March 6, 2014, and the investigation time was March 26, 2014.

Test site: Laokeng Village, Renshan Town, Huidong County, Huizhou City, Guangdong Province.

Application method: Mix 45kg/667m ² of water with directional spray.

Test results: as can be seen from the test results in Table 4, the herbicidal composition of the present invention 20% clorazosulfuron-methyl quizalofop-p-ethyl wettable powder, 30% chlorpyrazosulfuron-methyl-alkoxyfop-ethyl oil suspension 60% chlorpyrazosulfuron-clethodim water-dispersible granules to control annual weeds in tomato transplanted fields are 94.6%, 93.1%, 94.3%, and the effect is better than 75% chlorpyrazosulfuron-methyl water dispersible granules The control effect was 71.1%, 15% quizalofop-p-ethyl EC was 71.7%, the 10.8 high-efficiency flurifop-pyl EC was 80.6%, and the 24% clethodim EC was 87.8%. Experiments have proved that the combination of chlorpyrazosulfuron-methyl and quizalofop-p-ethyl, high-efficiency haloxyfop-pyl, and clethodim can improve the effect and expand the advantages of herbicidal spectrum.

Table 4. Field efficacy test results of controlling annual weeds in tomato fields.

Claims (6)

1. a Herbicidal combinations, is characterized in that: described Herbicidal combinations is made up of active ingredient a and active ingredient b, and wherein active ingredient a is halosulfuronmethyl, and active ingredient b is the one in Quizalotop-ethyl, haloxyfop-r-methyl or clethodim.

2. a kind of Herbicidal combinations according to claim 1, is characterized in that: the ratio of weight and number of active ingredient a and active ingredient b is 1:10-10:1.

3. a kind of Herbicidal combinations according to claim 1, is characterized in that: the ratio of weight and number of active ingredient a and active ingredient b is 1:3-3:1.

4. a kind of Herbicidal combinations according to claim 1, is characterized in that: two kinds of active ingredient weight summations percentage by weight is in the composition 1-90%, and surplus is agriculturally acceptable insecticides adjuvant.

5. a kind of Herbicidal combinations according to claim 1, is characterized in that: the formulation of described Herbicidal combinations is the one in oil-suspending agent, wetting powder or water dispersible granules.

6. a kind of Herbicidal combinations according to claim 1 is preventing and kill off the application on the annual weed of farmland.