阅读说明：本技术 一种包含啶磺草胺、甲基二磺隆和炔草酯的除草组合物 (Weeding composition containing pyroxsulam, mesosulfuron and clodinafop-propargyl ) 是由 陈琦 刘言合 于 2021-01-22 设计创作，主要内容包括：本发明提供一种包含啶磺草胺、甲基二磺隆和炔草酯的除草组合物,包含如重量的组分,啶磺草胺1-20％、甲基二磺隆1-10％和炔草酯1-25％。本发明的除草组合可用于小麦田一年生杂草的防除,具有显著的增效作用。(The invention provides a weeding composition containing pyroxsulam, mesosulfuron and clodinafop-propargyl, which comprises 1-20% of pyroxsulam, 1-10% of mesosulfuron and 1-25% of clodinafop-propargyl by weight. The weeding composition can be used for preventing and removing annual weeds in wheat fields, and has a remarkable synergistic effect.)

1. A weeding composition containing pyroxsulam, mesosulfuron and clodinafop-propargyl is characterized by comprising 1-20% of pyroxsulam, 1-10% of mesosulfuron and 1-25% of clodinafop-propargyl by weight.

2. A herbicidal composition according to claim 1, characterized in that the mass ratio of pyroxsulam, mesosulfuron and clodinafop-propargyl is 1-4:1-6: 5-20.

3. The herbicidal composition as claimed in claim 2, wherein the herbicidal composition is mixed with the usual adjuvants for agricultural use to prepare any formulation suitable for agricultural use.

4. A herbicidal composition according to claim 3, wherein said formulation is a dispersible oil suspension, water dispersible granule, wettable powder, soluble powder.

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

6. Use of a herbicidal composition according to claim 5, characterized in that the weeds are annual weeds.

Technical Field

The invention belongs to the field of herbicides, and particularly relates to a weeding composition containing pyroxsulam, mesosulfuron and clodinafop-propargyl and application thereof.

Background

The pyroxsulam is a systemic conduction type herbicide for winter wheat field after seedling emergence, can effectively prevent and kill annual gramineous weeds in wheat fields such as alopecurus, Japanese alopecurus, bromus and the like, and can also inhibit weeds such as hardwood, wild oat, lolium multiflorum, wild agrimony, speedwell and the like.

The mesosulfuron-methyl is a systemic selective stem leaf herbicide for preventing and killing gramineous weeds and part of broad leaf weeds in wheat fields after seedlings are planted, has a wide application period, and can prevent and kill most annual gramineous weeds and part of broad leaf weeds in wheat fields such as hardwood, bluegrass, soda grass, club grass, alopecurus, beckmelon, syziaceae, horsfiella syzizyphne, lolium multiflorum, wild oats, comfrey, caraway, shepherd's purse and the like.

The clodinafop-propargyl is a wheat field herbicide for treating postemergence stems and leaves, has good and stable control effect on most important annual grassy weeds such as wild oat, alopecurus, carex, beckmannia syzigachne, club grass and the like, and has low temperature resistance and rain wash resistance

According to the previous investigation of the prior art, no literature report related to the combination of pyroxsulam, mesosulfuron and clodinafop-propargyl exists in the prior art. In addition, as known in the art, the single use of the composition for a long time easily causes the drug resistance of weeds, pollutes the environment, and the research and development of a synergistic composition which can improve the weeding effect and reduce the application dosage of active ingredients is the key point of the research and development of a plurality of pesticide companies in China.

Disclosure of Invention

The weeding composition containing pyroxsulam, mesosulfuron and clodinafop-propargyl and the application thereof have a remarkable synergistic effect. The specific technical scheme is as follows:

a weeding composition containing pyroxsulam, mesosulfuron and clodinafop-propargyl comprises 1-20% of pyroxsulam, 1-10% of mesosulfuron and 1-25% of clodinafop-propargyl by weight.

In the weeding combination, the mass ratio of pyroxsulam to mesosulfuron to clodinafop-propargyl is 1-4:1-6: 5-20.

The weeding composition is mixed with common auxiliary materials on pesticides to prepare any preparation suitable for agriculture. Preferably, the preparation is dispersible oil suspending agent, water dispersible granule, wettable powder and soluble powder. Preferably:

the oil suspension agent comprises the following components in percentage by weight: 1-20% of pyroxsulam, 1-10% of mesosulfuron, 1-25% of clodinafop-propargyl, 0.2-10% of wetting agent, 0.1-10% of dispersing agent, 0.2-6% of stabilizing agent, 0.2-5% of thickening agent, 0.05-4% of antifreezing agent, 0.2-5% of defoaming agent, 1-6% of cosolvent and the balance of solvent.

The water dispersible granule comprises the following components in percentage by weight: 1-20% of pyroxsulam, 1-10% of mesosulfuron, 1-25% of clodinafop-propargyl, 0.2-10% of wetting agent, 1-20% of wetting agent, 1-15% of dispersing agent, 1-5% of binder, 1-5% of disintegrating agent, 0-2% of stabilizer and the balance of filler.

The wettable powder comprises the following components in percentage by weight: 1-20% of pyroxsulam, 1-10% of mesosulfuron-methyl, 1-25% of clodinafop-propargyl, 1-10% of wetting agent, 1-20% of dispersing agent, 0-5% of penetrating agent and the balance of filler.

The weeding composition is used for preventing and removing weeds in wheat fields. Preferably said weeds are annual weeds. Preferred weeds are: wild oat, alopecurus, stiff grass and bluegrass.

Compared with the prior art, the invention has the following beneficial effects:

the compound composition of pyroxsulam, mesosulfuron and clodinafop-propargyl has synergistic combined effect on the alopecurus. The compound composition of pyroxsulam, mesosulfuron and clodinafop-propargyl has good control effect on weeds such as wild oat, alopecurus, carex, and bluegrass in wheat fields. The ternary composition prepared by the invention can slow down the generation of weed drug resistance, reduce the dosage of active ingredients and has obvious synergistic effect.

Detailed Description

The invention will be better understood from the following examples. However, those skilled in the art will readily appreciate that the description of the embodiments is illustrative only and should not be taken as limiting the invention as described in detail in the claims

Example 1: indoor determination of pyroxsulam, mesosulfuron-methyl and clodinafop-propargyl compound pairing physalis alkekengi

The tested weeds: mature seeds are collected in the field of the alopecurus, cultured in a laboratory, desensitized and stored.

Reagent to be tested: pyribenzoxim, mesosulfuron and clodinafop-propargyl; is commercially available.

The test method comprises the following steps: accurately weighing the test medicament, and dissolving a small amount of acetone to prepare high-concentration mother liquor. When in application, Tween-80 aqueous solution with mass fraction of 0.1% is respectively diluted into the required dosage for test, and Tween-80 aqueous solution with mass fraction of 0.1% without medicament is used as blank control.

A greenhouse potting method is adopted. The soil for the test is special soil for the test collected from the land without medicine. Filling soil special for the test into a flowerpot; the flowerpot is placed in a basin for containing water, and soil is kept moist by adopting an infiltrating irrigation mode at the bottom of the basin. Sowing a certain amount of the seeds of the myrtle in a flowerpot, and covering 1cm of soil after sowing. And (3) seedling and plant setting in the 2-leaf stage, reserving 20 physalis pubescens with consistent growth potential in each pot, and treating when the physalis pubescens grows to the 3-4 leaf stage. The stem and leaf spray treatment was carried out using a potter spray apparatus (liquid spray amount: 45mL/m2), and the treatment was repeated 4 times. And (4) after treatment, placing the treated straw chopper in a greenhouse for normal management, regularly observing the growth condition of the straw chopper, weighing the fresh weight of the overground part of the straw chopper after 7 days, and calculating the fresh weight inhibition rate. The combined effect of the herbicidal compositions was evaluated using the Gowing method. The actually measured fresh weight inhibition rate after compounding is represented by E. When the content of E-E0 is more than 10 percent, the synergistic effect is achieved, when the content of E-E0 < -10 percent is antagonistic effect, and when the content of E-E0 is between-10 percent and 10 percent, the additive effect is achieved.

And (4) analyzing results: the compound composition of pyroxsulam, mesosulfuron and clodinafop-propargyl has synergistic combined effect on the alopecurus.

TABLE 1 indoor determination result of compounded composition on bride

EXAMPLE 2 formulation

17% pyroxsulam-mesosulfuron clodinafop-propargyl dispersible oil suspending agent

4% of pyroxsulam, 3% of mesosulfuron, 10% of clodinafop-propargyl, 5% of castor oil polyoxyethylene ether, 5% of naphthalenesulfonate formaldehyde condensate, 4% of calcium lignosulfonate, 3% of bentonite, 3% of ethylene glycol and the balance of vegetable oil to 100%.

50% pyroxsulam-mesosulfuron-propargyl water dispersible granule

10% of pyroxsulam, 15% of mesosulfuron, 25% of clodinafop-propargyl, 8% of polycarboxylate, 6% of sodium dodecyl benzene sulfonate, 3% of urea, 4% of sodium carboxymethyl cellulose and the balance of kaolin to 100%.

24% pyridaben-methyl disulfuron clodinafop-propargyl wettable powder

1% of pyroxsulam, 3% of mesosulfuron, 20% of clodinafop-propargyl, 10% of sodium dodecyl benzene sulfonate, 6% of calcium lignosulfonate and 100% of white carbon black.

Comparison 1: 1% of pyroxsulam, 3% of mesosulfuron, 10% of sodium dodecyl benzene sulfonate, 6% of calcium lignosulfonate and 100% of white carbon black.

Comparison 2: 20% of clodinafop-propargyl, 10% of sodium dodecyl benzene sulfonate, 6% of calcium lignosulfonate and 100% of white carbon black.

Example 3 Compound field efficacy assay of pyroxsulam, mesosulfuron-methyl and clodinafop-propargyl

And (3) test crops: wheat field weeds: wild oat, alopecurus, stiff grass and bluegrass.

The application method comprises the following steps: setting 3 medicament treatments, 2 comparison treatments and 1 blank control, and repeating for 3 times; the area per cell was 20m2, and the random arrangement was made. Spraying stem and leaf with sprayer. And (5) investigating the weed fresh weight control effect 14d after the application.

And (4) analyzing results: the compound composition of pyroxsulam, mesosulfuron and clodinafop-propargyl has good control effect on weeds in wheat fields such as barnyard grass, wild oat, alopecurus, stiff grass and bluegrass.

Table 3 weed control effect of compound preparation on wheat field

The foregoing is only a preferred embodiment of the present invention, and it will be apparent to those skilled in the art that modifications may be made without departing from the invention as claimed in the invention and these modifications are within the scope of the invention.