CN112790192A

CN112790192A - Trielement weeding composition containing fluopicolide

Info

Publication number: CN112790192A
Application number: CN202110147241.9A
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: 2021-05-14

Abstract

The invention provides a ternary weeding composition containing picolinafen, 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 picolinafen; 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

Trielement weeding composition containing fluopicolide

Technical Field

The invention belongs to the field of herbicides, and particularly relates to a ternary weeding composition containing picolinafen 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.

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

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.

Flupyrazamide is an amide herbicide, chlorophyll is damaged and cell membranes are broken by inhibiting the biosynthesis of carotenoid in plants, weeds show that buds are decolorized or white, and finally the whole plant is wilted to die. The herbicide composition is mainly used for closed prevention and removal of annual broad-leaved weeds such as veronica officinalis, chickweed, starwort, pagoda grass, shepherd's purse and descurainia sophia before winter wheat seedlings.

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 picolinafen.

Disclosure of Invention

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

a ternary weeding composition containing picolinafen 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 picolinafen; 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 1-4 parts of topramezone, 10-40 parts of metolachlor and 0.5-2 parts of picolinafen in mass ratio; the mass ratio of the xaflufen to the pretilachlor to the diflufenican is 1:5:0.5, 2:10:0.5, 2:5:1, 4:10:1 and 4:5: 2.

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

The weeding composition is used for preventing and removing weeds in wheat fields. Preferably, the weeds are cleavers, alopecurus, chickweed, cyperus heterophyllus and stephania japonica.

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 drug resistance of weeds.

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 compounding of pyraflufen-ethyl, metolachlor and fluopicolide 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 pyriftalid technical, a metolachlor technical and a picolinafen technical; 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 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 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 compounding of the topramezone, the metolachlor and the fluopicolide has a synergistic effect on the alopecurus; 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 picolinafen 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 compounding of the topramezone, the pretilachlor and the fluopicolide has different combined effects on the alopecurus; when the mixture ratio of the topramezone, the metolachlor and the picolinafen is 1:20:1, 1:10:22:20:2 and 4:20:0.5, the composition shows additive effect; when the mixture ratio of the topramezone, the metolachlor and the picolinafen is 1:5:0.5, 2:10:0.5, 2:5:1, 4:10:1 and 4:5:2, the composition shows 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

32% water dispersion granule of pyraflufen-ethyl, metolachlor and fluopicolide

8% of sulfonylpyraflufen, 20% of metolachlor, 4% of fluopicolide, 8% of sodium lignosulfonate, 6% of sodium dodecyl sulfate, 6% of NNO, 3% of urea, 3% of sodium carboxymethylcellulose and the balance of bentonite to 100%.

44% wettable powder of sulfonylpyraflufen-pretilachlor-diflufenican

16% of pyraflufen-ethyl, 20% of pretilachlor, 8% of picolinafen, 8% of calcium dodecyl benzene sulfonate, 7% of calcium lignosulfonate, 5% of white carbon black and 100% of kaolin.

Example 4 field efficacy assay of a combination of pyriftalid, metolachlor (pretilachlor) and picolinafen

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

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 fluopicolide has excellent control effect on weeds in wheat fields, and when the dosage of the 32 percent of the topramezone, the metolachlor and the fluopicolide water dispersible granule is 18 ga.i./mu, the total control effect on weeds, cleavers, alopecurus, chickweeds, abnormal sedges and stephania japonica is 93.78 percent; when the dosage of the 44% wettable powder of the topramezone, the pretilachlor and the oxyfluorfen is 12 ga.i./mu, the total control effect on the wheat field weeds, namely cleavers, alopecurus, chickweed, cyperus heterophyllus and stephania japonica is 100.00%.

Table 2 herbicide 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. A ternary weeding composition containing picolinafen 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 picolinafen; and the weight percentage of the active ingredients is as follows: active component A1-40%, active component B1-50% and active component C1-20%.

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

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 selected from the group consisting of a suspension, a suspoemulsion, a dispersible oil suspension, and 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. The use of a herbicidal composition according to claim 8, wherein the weeds are cleavers, physalis alkekengi, chickweed, cyperus heterophyllus and stephania japonica.