CN112931518A

CN112931518A - Ternary weeding composition containing xaflufen-ethyl

Info

Publication number: CN112931518A
Application number: CN202110147237.2A
Authority: CN
Inventors: 陈琦; 刘言合; 朱传明
Original assignee: Anhui Runnongtenghui Biotechnology Co ltd
Current assignee: Anhui Runnongtenghui Biotechnology Co ltd
Priority date: 2021-02-03
Filing date: 2021-02-03
Publication date: 2021-06-11

Abstract

The invention provides a ternary weeding composition containing sulfoxaflor, which comprises an active ingredient A, an active ingredient B and an active ingredient C; the active ingredient A is the topramezone, the active ingredient B is the metolachlor or the pretilachlor, and the active ingredient C is the diflufenican; and the weight percentage of the active ingredients is as follows: 1-40% of active ingredient A, 1-50% of active ingredient B and 1-20% of active ingredient C. The weeding composition can be used for preventing and removing annual weeds in wheat fields, and has a remarkable synergistic effect.

Description

Ternary weeding composition containing xaflufen-ethyl

Technical Field

The invention belongs to the field of herbicides, and particularly relates to a ternary weeding composition containing pyriftalid 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 young roots, and after the plant buds, the growth of apical meristem and coleoptile 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 winter wheat fields in dry lands.

Metolachlor is an amide selective preemergence herbicide, mainly inhibits the protein synthesis of germinated seeds, and secondly inhibits choline from permeating phospholipid to interfere the formation of lecithin, so that annual gramineous weeds and part of small-grain seed broadleaf weeds can be effectively prevented and killed off.

Pretilachlor can effectively prevent and kill barnyard grass, moleplant seed, eleusine indica, feltwort, cyperus rotundus, monochoria vaginalis, rhizoma alismatis, ludwigia prostrata and other annual weeds.

Diflufenican is an anilide herbicide, and the action mechanism is that when weeds germinate and pass through a drug soil layer, sprouts or root systems absorb a medicament to inhibit the synthesis of carotenoid in the weeds, so that the carotenoid content in the weeds is reduced, chlorophyll is damaged, cell membranes are broken, the obtained weeds show that the sprouts are decolorized or white, and finally the whole 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, the metolachlor or the pretilachlor and the diflufenican.

Disclosure of Invention

The invention relates to a ternary weeding composition containing pyraflufen-ethyl and application thereof. The specific technical scheme is as follows:

a ternary weeding composition containing pyraflufen-ethyl, which comprises an active ingredient A, an active ingredient B and an active ingredient C; the active ingredient A is the sulfuryl pyraflufen, the active ingredient B is the metolachlor or the pretilachlor, and the active ingredient C is the diflufenican; and the weight percentage of the active ingredients is as follows: active component A1-40%, active component B1-50% and active component C1-20%.

The weeding composition comprises the components of the topramezone, the metolachlor and the diflufenican in a mass ratio of 1-4:10-40: 0.5-3; the mass ratio of the sulfuryl pyraflufen to the pretilachlor to the diflufenican is 4:5-20:0.5-3 or 2:5-10:0.5-3 or 1:5: 0.5-3.

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

The weeding composition is used for preventing and removing weeds in wheat fields. Preferably, the weed is cleavers, alopecurus, barnyard grass and cyperus heterophyllus.

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

the weeding composition has a synergistic effect in a proper proportioning range, can effectively reduce the using dosage of active ingredients, and can slow down the generation of weed drug resistance.

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 compound of pyraflufen-ethyl, metolachlor and diflufenican on alopecurus

The tested weeds: and (4) collecting mature seeds in the field of the amur foxtail and storing the seeds in a laboratory.

Reagent to be tested: a pyriflufen technical, a metolachlor technical and a diflufenican technical; is commercially available.

The test method comprises the following steps: the test is carried out in an artificial intelligent climate chamber, a plurality of plastic basins 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 for testing 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 2d after sowing, performing soil surface spraying by adopting an ASS-4 type automatic control spraying tower, correcting the liquid spraying amount before the test according to the sequence from low dose to high dose in the test design, wherein the spraying pressure is 0.275MPa, the liquid spraying amount is 600kg/hm2, and the distance between the spray head and the pot is 50 cm. Each treatment was repeated 4 times and was blanked with 0.1% aqueous tween 80. The growth state of the tested weeds is observed and recorded regularly after the treatment, and 21 days after the treatment, the weeds on the overground part are harvested and weighed as fresh weight. And (4) carrying out data statistics according to the standard of the department, 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 combination of the topramezone, the metolachlor and the diflufenican has different combined effects on the expression of the amur foxtail; when the mixture ratio of the sulfuryl pyraflufen to the metolachlor to the diflufenican is 1: 40: 1.5 the composition appears additive; other mixture ratios show obvious synergistic effect; the composition with the synergistic effect can effectively reduce the using dosage of active ingredients and slow down the generation of drug resistance of weeds.

TABLE 1 indoor determination result of compounded composition on bride

Example 2: indoor determination of compounding of pyraflufen-ethyl, pretilachlor and diflufenican on alopecurus

Reagent to be tested: pretilachlor raw pesticide; is commercially available.

The test method is referred to example 1.

And (4) analyzing results: the compound of the topramezone, the pretilachlor and the diflufenican has different combined effects on the alopecurus; when the mixture ratio of the sulfuryl pyraflufen to the metolachlor to the diflufenican is 1: 20: 1.5, 1:10:3, 2:20:3 the composition exhibits additive effects; other mixture ratios show obvious synergistic effect; the composition with the synergistic effect can effectively reduce the using dosage of active ingredients and slow down the generation of drug resistance of weeds.

TABLE 2 indoor determination results of compounded compositions on the basis of the bride

EXAMPLE 3 formulation

34% of sulfonylpyraflufen-metolachlor-diflufenican water dispersible granules, namely sulfonylpyraflufen-8%, metolachlor-20%, diflufenican 6%, sodium lignin sulfonate 10%, sodium dodecyl sulfate 2%, sodium dodecyl benzene sulfonate 5%, urea 4%, sodium carboxymethylcellulose 4%, white carbon black 2% and kaolin for 100%.

36% wettable powder of pyraflufen-ethyl, pretilachlor and diflufenican

12% of pyraflufen-ethyl, 15% of pretilachlor, 9% of diflufenican, 4% of nekal, 6% of NNO, 6% of calcium lignosulphonate and the balance of kaolin to 100%.

Example 4 measurement of efficacy of Sulfoxaden, metolachlor (pretilachlor) and diflufenican in field

And (3) test crops: wheat field weeds: cleavers, alopecurus, barnyard grass and cyperus rotundus.

The application method comprises the following steps: setting 2 medicament treatments, 1 blank control and repeating for 4 times; the area per cell was 50m2, and the random arrangement was made. And (4) carrying out soil spraying treatment by adopting a sprayer. Investigating the total fresh weight of weeds by adopting an absolute value investigation method 30 days after the application of the herbicide, randomly selecting 5 points in each plot, investigating each point at 1m2, calculating the control effect of the fresh weight of the weeds,

and (4) analyzing results: the compound of the topramezone, the metolachlor and the diflufenican has excellent control effect on weeds in wheat fields, and when the dosage of the 34 percent of the aqueous dispersion granule of the topramezone, the metolachlor and the diflufenican is 15 ga.i./mu, the total control effect on weeds, cleavers, alopecurus, barnyard grass and special-shaped sedges in wheat fields is 90.75 percent; when the dosage of the 36% wettable powder of the pyriftalid, the pretilachlor and the diflufenican is 10 ga.i./mu, the total control effect on the wheat field weeds of cleavers, alopecurus, barnyard grass and cyperus heterophyllus is 93.70%.

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.

Claims

1. The ternary weeding composition containing the topramezone is characterized by comprising an active ingredient A, an active ingredient B and an active ingredient C; the active ingredient A is the topramezone, the active ingredient B is the metolachlor or the pretilachlor, and the active ingredient C is the diflufenican; and the weight percentage of the active ingredients is as follows: 1-40% of active ingredient A, 1-50% of active ingredient B and 1-20% of active ingredient C.

2. The weeding composition according to claim 1, wherein the mass ratio of the xaflufen-ethyl, the metolachlor and the diflufenican is 1-4:10-40: 0.5-3; the mass ratio of the sulfuryl pyraflufen to the pretilachlor to the diflufenican is 4:5-20:0.5-3 or 2:5-10:0.5-3 or 1:5: 0.5-3.

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 suspension, a dispersible oil suspension, or a water dispersible granule.

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, wherein the weeds are cleavers, alopecurus, barnyard grass, cyperus heterotropoides.