阅读说明：本技术 一种包含吡草醚、啶磺草胺和唑啉草酯的除草组合物 (Weeding composition containing pyraflufen-ethyl, pyroxsulam and pinoxaden ) 是由 陈琦 刘言合 戴权 于 2021-01-12 设计创作，主要内容包括：本发明提供一种包含吡草醚、啶磺草胺和唑啉草酯的除草组合物,包含如重量的组分,吡草醚1-20％、啶磺草胺1-20％和唑啉草酯1-40％。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 pyraflufen-ethyl, pyroxsulam and pinoxaden, which comprises 1-20% of pyraflufen-ethyl, 1-20% of pyroxsulam and 1-40% of pinoxaden 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 pyraflufen-ethyl, pyroxsulam and pinoxaden is characterized by comprising 1-20% of pyraflufen-ethyl, 1-20% of pyroxsulam and 1-40% of pinoxaden by weight.

2. The weeding composition according to claim 1, wherein the mass ratio of pyraflufen-ethyl, pyroxsulam and pinoxaden is 1-10:1-10: 1-20.

3. A herbicidal composition according to claim 2, characterized in that the mass ratio of pyraflufen-ethyl, pyroxsulam and pinoxaden is 1-6:1-7: 2.5-15.

4. A weeding composition as claimed in claim 3, wherein the mass ratio of pyraflufen-ethyl, pyroxsulam and pinoxaden is 3-6:4-7: 2.5-15.

5. A weeding composition as claimed in claim 4, wherein the mass ratio of pyraflufen-ethyl, pyroxsulam and pinoxaden is 6:1:15, 6:4:2.5, 6:7:7.5, 3:4:1.5, 0.3:0.1:7.5, 3:7:2.5, 1:4:7.5 and 1:1: 2.5.

6. The herbicidal composition as claimed in claim 1, wherein the herbicidal composition is mixed with the usual adjuvants for agricultural use to prepare any formulation suitable for agricultural use.

7. A herbicidal composition according to claim 6, wherein said formulation is a dispersible oil suspension, suspoemulsion, microemulsion, emulsion in water, suspoemulsion, water dispersible granule, wettable powder, soluble powder.

8. Use of the herbicidal composition according to any one of claims 1 to 7 for controlling weeds in wheat fields.

9. Use of a herbicidal composition according to claim 8, 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 pyraflufen-ethyl, pyroxsulam and pinoxaden and application thereof.

Background

Pyraflufen-ethyl is a contact herbicide for efficiently and quickly preventing and killing broad-leaved weeds in the 2-4 leaf stage of a wheat field, has obvious weeding effect on weeds difficult to remove, such as cleavers, descurainia sophia and shepherd's purse, and has quick action.

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.

Pinoxaden is a new class of phenylpyrazoline herbicides, the mechanism of action being an acetyl-coa carboxylase (ACC) inhibitor. The synthesis of fatty acid is hindered, the cell growth and division are stopped, and the lipid-containing structure of the cell membrane is damaged, so that the weeds are killed. Has systemic conductivity, is mainly used for preventing and killing annual gramineous weeds in winter wheat fields, and can prevent and kill most of annual gramineous weeds such as wild oat, alopecurus, green bristlegrass, barnyard grass and the like.

According to the previous investigation of the prior art, no related literature report of the combination of pyraflufen-ethyl, pyroxsulam and pinoxaden 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 pyraflufen-ethyl, pyroxsulam and pinoxaden and the application thereof have a remarkable synergistic effect. The specific technical scheme is as follows:

a weeding composition containing pyraflufen-ethyl, pyroxsulam and pinoxaden comprises 1-20% of pyraflufen-ethyl, 1-20% of pyroxsulam and 1-40% of pinoxaden by weight.

In the weeding combination, the mass ratio of pyraflufen-ethyl, pyroxsulam and pinoxaden is 1-10:1-10: 1-20. The preferable mass ratio of the pyraflufen-ethyl, the pyroxsulam and the pinoxaden is 1-6:1-7: 2.5-15. The preferable mass ratio of the pyraflufen-ethyl, the pyroxsulam and the pinoxaden is 3-6:4-7: 2.5-15; more preferably, the mass ratio of the pyraflufen-ethyl, the pyroxsulam and the pinoxaden is 6:1:15, 6:4:2.5, 6:7:7.5, 3:4:1.5, 0.3:0.1:7.5, 3:7:2.5, 1:4:7.5 and 1:1: 2.5.

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, suspoemulsion, missible oil, emulsion in water, suspoemulsion, water dispersible granule, wettable powder and soluble powder.

The oil suspension agent comprises the following components in percentage by weight: 1-20% of pyraflufen-ethyl, 1-20% of pyroxsulam, 1-40% of pinoxaden, 0.2-15% of wetting agent, 0.1-15% 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 pyraflufen-ethyl, 1-20% of pyroxsulam, 1-40% of pinoxaden, 0.2-15% 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 pyraflufen-ethyl, 1-20% of pyroxsulam, 1-40% of pinoxaden, 1-15% 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, cleavers.

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

the pyraflufen-ethyl, pyroxsulam and pinoxaden compound composition has synergistic combined action on wild oats within an adaptive proportioning range. The pyraflufen-pyributicarb, pyroxsulam and pinoxaden compound composition has synergistic combined effect on cleavers in an adaptive proportioning range. 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 only for illustrating the present invention and should not be taken as limiting the invention as detailed in the claims.

Example 1: indoor determination of pyraflufen-ethyl, pyroxsulam and pinoxaden compound paired wild oats

The tested weeds: wild oat, collecting mature seeds in the field, culturing in a laboratory, desensitizing, and storing.

Reagent to be tested: pyraflufen-ethyl technical, pyroxsulam technical and pinoxaden technical; 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 wild oat seeds in a flowerpot, and covering soil for 1cm after sowing. And (3) seedling and plant fixing at the 2-leaf stage, reserving 20 wild oats with consistent growth potential in each pot, and treating when the wild oats grow 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 after treatment, placing the wild oat in a greenhouse for normal management, regularly observing the growth condition of the wild oat, weighing the fresh weight of the overground part of the wild oat after 14 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 pyraflufen-ethyl, pyroxsulam and pinoxaden compound has synergistic or additive combined action on wild oats; when the mass ratio of the pyraflufen-ethyl, the pyroxsulam and the pinoxaden is 0.6:0.1:1.5, and the mass ratio of the pyroxsulam-ethyl and the pinoxaden is 0.1:0.7:1.5, the wild oat is added; when; when the mass ratio of the pyraflufen-ethyl, the pyroxsulam and the pinoxaden is 0.6:0.4:0.25, 0.6:0.7:0.75, 0.3:0.4:1.5, 0.3:0.1:0.75, 0.3:0.7:0.25, 0.1:0.4:0.75 and 0.1:0.1:0.25, the synergistic effect is shown on wild oats.

TABLE 1 indoor determination of formulated composition on Avena sativa

Example 2: indoor determination of complex of pyraflufen-ethyl, pyroxsulam and pinoxaden

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

And (4) analyzing results: the pyraflufen-pyributicarb, pyroxsulam and pinoxaden compound has synergistic or additive combined effect on the cleaver chamber; when the mass ratio of the pyraflufen to the pyroxsulam to the pinoxaden is 0.1:0.7:1.5, the effect of adding the pyrauxins to the cleavers is shown; when; when the mass ratio of the pyraflufen-ethyl, the pyroxsulam and the pinoxaden is 0.6:0.1:1.5, 0.6:0.4:0.25, 0.6:0.7:0.75, 0.3:0.4:1.5, 0.3:0.1:0.75, 0.3:0.7:0.25, 0.1:0.4:0.75 and 0.1:0.1:0.25, the synergistic effect is shown on the cleavers.

TABLE 2 indoor determination results of compounded compositions on Galium aparine

EXAMPLE 3 formulation

Dispersible oil suspending agent containing 22% pyraflufen-pyroxsulam-pinoxaden

3% of pyraflufen-ethyl, 4% of pyroxsulam, 15% of pinoxaden, 6% of castor oil polyoxyethylene ether, 1601# 4% of agricultural emulsion, 5% of sodium lignosulfonate, 5% of bentonite, 2% of ethylene glycol and methyl oleate, wherein the total amount is 100%.

45% pyraflufen-pyroxsulam-pinoxaden water dispersible granule

10% of pyraflufen-ethyl, 10% of pyroxsulam, 25% of pinoxaden, 9% of NNO, 10% of nekal, 4% of urea, 2% of sodium carboxymethylcellulose and the balance of attapulgite to 100%.

46% pyraflufen-pyroxsulam-pinoxaden wettable powder

12% of pyraflufen-ethyl, 4% of pyroxsulam, 30% of pinoxaden, 12% of nekal, 7% of calcium lignosulphonate and the balance of kaolin to 100%.

Example 4 determination of Compound field drug Effect of Bispyribac-sodium, pyroxsulam and pinoxaden

And (3) test crops: wheat field weeds: wild oat, alopecurus, cleavers.

The application method comprises the following steps: 3 drug treatments were set, 1 blank control, repeated 3 times; the area per cell was 40m2, randomly arranged. Spraying stem and leaf with sprayer. And (5) investigating the weed fresh weight control effect 21d after the application.

And (4) analyzing results: the pyraflufen-pyribenzoxim compound composition has a good control effect on weeds such as wild oats, alopecurus as well as cleavers in wheat fields.

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.