阅读说明：本技术 一种包含砜吡草唑和嗪草酸甲酯的除草组合物 (Weeding composition containing pyraflufen-ethyl and metribuzin ) 是由 陈琦 刘言合 朱传明 于 2021-02-04 设计创作，主要内容包括：本发明提供一种包含砜吡草唑和嗪草酸甲酯的除草组合物,包含如重量的组分,砜吡草唑1-40％和嗪草酸甲酯0.1-20％。本发明的除草组合可用于玉米、大豆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 and metribuzin, which comprises the following components in percentage by weight, 1-40% of the pyraflufen-ethyl and 0.1-20% of the metribuzin. The weeding composition can be used for preventing and removing annual weeds in corn and soybean fields, and has a remarkable synergistic effect.)

1. A weeding composition containing the sulfuryl pyraflufen-ethyl and the metribuzin is characterized by comprising the components with the weight percentage of 1-40 percent of the sulfuryl pyraflufen-ethyl and 0.1-20 percent of the metribuzin.

2. The weeding composition according to claim 1, wherein the mass ratio of the xaflufen-ethyl to the metribuzin is 1-4:0.1-0.3, 1: 0.03.

3. 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.

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 corn and soybean fields.

6. Use of a herbicidal composition according to claim 5, wherein the weeds are descurainia sophia, cleavers, chickweed, brome.

Technical Field

The invention belongs to the field of herbicides, and particularly relates to a weeding composition containing pyraflufen-ethyl and metribuzin and application thereof.

Background

Sulfonepyrazoxazoles belong to a novel class of isoxazole herbicides that specifically inhibit many of the elongation steps catalyzed by VLCFA elongases. Is absorbed by the plant mainly through the young buds and roots, and after the plant germinates, the growth of apical meristems and coleoptiles is blocked. Can effectively prevent and control a plurality of common weeds such as brome, alopecurus macrorhizus, descurainia sophia, shepherd's purse and the like in the winter wheat field of the dry land.

The methyl oxazinate is a selective post-emergence herbicide, is mainly used for preventing and killing annual broadleaf weeds in soybean and corn fields, and has special effect on abutilon. The weeding action mechanism is that protoporphyrinogen oxidase in sensitive plant chloroplast synthesis is inhibited, so that protoporphyrin accumulation is caused, cell membranes are necrotic, and plants die.

The herbicide is easy to cause the drug resistance of weeds after being singly used for a long time, causes pollution to the environment, and can effectively reduce the application dosage of active ingredients and improve the weeding effect by the synergistic weeding composition. In the prior art, no report is provided about the compound use of the topramezone and the oxazine methyl oxalate.

Disclosure of Invention

The weeding composition containing the topramezone and the oxazine methyl oxalate and the application thereof have obvious synergistic effect. The specific technical scheme is as follows:

a weeding composition containing the sulfuryl pyraflufen-ethyl and the metribuzin is characterized by comprising the components with the weight percentage of 1-40 percent of the sulfuryl pyraflufen-ethyl and 0.1-20 percent of the metribuzin.

The weeding composition comprises 1-4 parts of sulpyrazofen and 1-0.1-0.3 parts of fluazifop-methyl oxalate in a mass ratio of 1: 0.03.

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

The weeding composition is used for preventing and removing weeds in corn and soybean fields. Preferably, the weeds are descurainia sophia, cleavers, chickweed and brome.

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

1. the cleavers are compounded by the sulpirazole and the oxazine methyl oxalate and have different combined effects; when the mass ratio of the sulfonepyraflufen to the oxazine methyl oxalate is 1-4:0.1-0.3, 1: at 0.03 the composition exhibits a synergistic effect, E-E0 > 10%; when the mass ratio of the pyraflufen-ethyl to the oxazine methyl oxalate is 2:0.03, 4; at 0.03 the composition appears additive, E-E0 being between-10% and 10%. 2. When the dosage of the active ingredients of the compound composition is 3-4 ga.i./mu; over 88 percent of the herbicide composition can effectively reduce the dosage of active ingredients and slow down the generation of drug resistance of weeds in corn fields.

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 cleavers through compounding of sulpirazole and oxazine methyl oxalate

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

Reagent to be tested: a raw material of pyraflufen-ethyl and a raw material of methyl oxazinate; is commercially available.

The test method comprises the following steps: the test is carried out in an artificial intelligent climate room, a plurality of plastic pots with the diameter of 25cm are selected, a proper amount of moist sterilized loam is added, the soil surface diameter is 20cm, the temperature is 20-25 ℃, the relative humidity is 60% -80%, the illumination and darkness are 14h to 10h, the intensity is 2000Lux, and the culture medium is screened air-dried loam. And (3) completely wetting the soil by adopting a pot bottom infiltrating irrigation mode, uniformly scattering the pretreated weed seeds to be tested on the surface of the soil, covering soil for 1cm, transferring the sowed weed seeds into a greenhouse for conventional culture, and supplementing water by adopting a pot bottom infiltrating irrigation mode. And (4) seedling and plant setting are carried out in the 2-leaf stage, 15 plants are remained in each pot, and the plants are treated when the plants grow to the 3-4 leaf stage. Carrying out stem and leaf spraying treatment according to the designed dosage, using an automatic control spraying tower as a spraying device, correcting the spraying liquid amount before the test, carrying out stem and leaf spraying treatment according to the test design from low dosage to high dosage, repeating the treatment for 4 times, and setting a 0.1% Tween 80 aqueous solution sprayed with a corresponding organic solvent as a blank control. The growth state of the tested weeds is observed and recorded regularly after the treatment, and the weeds on the overground part are harvested 21 days after the treatment and are weighed as fresh weight. And (4) carrying out data statistics according to the standard of the ministry, and testing and judging the compounded herbicide by using a 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 cleavers are compounded by the sulpirazole and the oxazine methyl oxalate and have different combined effects; when the mass ratio of the sulfonepyraflufen to the oxazine methyl oxalate is 1-4:0.1-0.3, 1: at 0.03 the composition exhibits a synergistic effect, E-E0 > 10%; when the mass ratio of the sulfonepyraflufen to the oxazine methyl oxalate is 2:0.03, 4; at 0.03 the composition appears additive, E-E0 being between-10% and 10%.

TABLE 1 indoor determination results of compounded compositions on Galium aparine

EXAMPLE 2 formulation

33% sulfonepyrazoxazole and metribuzin oxalate water dispersible granule

30% of sulfonepyraflufen-ethyl, 3% of oxazine methyl oxalate, 2% of sodium dodecyl sulfate, 5% of NNO, 8% of nekal, 4% of urea, 4% of sodium carboxymethylcellulose and bentonite, wherein the total content is 100%.

Wettable powder of 42% of sulfonylpyraflufen and metribuzin oxalate

40% of sulfonepyraflufen-ethyl, 2% of oxazine methyl oxalate, 6% of sodium dodecyl benzene sulfonate, 6% of nekal, 5% of white carbon black and the balance of kaolin to 100%.

Example 3 measurement of Compound field drug Effect of Sulfoxaden and Oxazinium methyl ester

And (3) test crops: weeds in corn fields: descurainia sophia, cleavers, chickweed and brome.

The application method comprises the following steps: setting 2 medicament treatments, 1 blank control and repeating for 4 times; the area per cell was 40m2, randomly arranged. Spraying stem and leaf with sprayer. At 21d after the application, randomly selecting 5 points in each plot, carrying out sampling investigation at each point of 0.25m2, calculating the fresh weight control effect of weeds,

and (4) analyzing results: the compound of the pyraflufen-ethyl and the metamifop has excellent control effect on weeds in a corn field, and when the using amount of active ingredients of the compound composition is 3-4 ga.i./mu; over 88 percent of the herbicide composition can effectively reduce the dosage of active ingredients and slow down the generation of drug resistance of weeds in corn fields.

TABLE 2 herbicidal Effect of the compounded preparations on corn 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.