CN114788525B

CN114788525B - Composition containing Ephrifenacil and penoxsulam and application thereof

Info

Publication number: CN114788525B
Application number: CN202210715987.XA
Authority: CN
Inventors: 王世辉; 于志波; 王风杰; 卢希海
Original assignee: Shandong Kanghui Plant Protection Co ltd
Current assignee: Shandong Kanghui Plant Protection Co ltd
Priority date: 2022-06-23
Filing date: 2022-06-23
Publication date: 2022-09-16
Anticipated expiration: 2042-06-23
Also published as: CN114788525A

Abstract

The invention belongs to the field of pesticide herbicides, and particularly relates to a weeding composition containing Ephrifenacil and penoxsulam and application thereof. The active ingredients of the weeding composition containing Epyrifenacil and penoxsulam are composed of Epyrifenacil and penoxsulam, and the mass ratio of the Epyrifenacil to the penoxsulam is 1-20: 1-20. The weeding composition containing Epyrofenacil and penoxsulam is used for preventing and controlling weeds such as barnyard grass, green bristlegrass and amaranthus retroflexus in paddy fields.

Description

Composition containing Ephrifenacil and penoxsulam and application thereof

Technical Field

The invention belongs to the field of pesticide herbicides, and particularly relates to a weeding composition containing Ephrifenacil and penoxsulam and application thereof.

Background

Ephrifenacin is a uracil herbicide found and developed by Sumitomo chemical corporation, and its mechanism of action is a protoporphyrinogen oxidase (PPO) inhibitor. Chemical name: [ (3- { 2-chloro-5- [3, 6-dihydro-3-methyl-2, 6-dioxo-4- (trifluoromethyl) pyrimidin-1 (2H) -yl ] -4-fluorophenoxy } -2-pyridine) oxy ] acetic acid ethyl ester; CAS accession number: 353292-31-6.

Penoxsulam belongs to sulfonylurea herbicides, is absorbed by young buds, stems, leaves and root systems of weeds, is conducted to meristems through xylem and phloem, inhibits the growth and yellowing of plants, kills the plants within 2-4 weeks, and effectively prevents and removes annual weeds in paddy fields.

In order to slow down the generation of weed drug resistance and reduce the using dosage of active ingredients, the combined use of a plurality of active ingredients is a research and development hotspot in the field of pesticides, and no related report about the combined use of Epyrefenacil and penoxsulam is reported in the prior art.

Disclosure of Invention

The invention aims to solve the technical problems of retarding the generation of weed drug resistance and reducing the dosage of active ingredients, and provides a weeding composition with remarkable synergistic effect.

The technical scheme provided by the invention is as follows:

the active ingredients of the weeding composition containing Epyrifenacil and penoxsulam are composed of Epyrifenacil and penoxsulam, and the mass ratio of the Epyrifenacil to the penoxsulam is 1-20: 1-20.

Preferably, the mass ratio of Epyrefenacil to penoxsulam is 1-10: 1-10; preferably 1 to 5: 1-5.

The invention also provides a pesticide preparation containing the weeding composition, which comprises 5-75 percent of active ingredients and agricultural auxiliary ingredients. Preferably, the percentage of active ingredient is 15-50%.

The pesticide preparation is in the dosage form of wettable powder, water dispersible granules, soluble powder, suspending agent or dispersible oil suspending agent; preferably wettable powder, water dispersible granules and suspending agents.

The invention also provides application of the weeding composition in preventing and controlling weeds in paddy fields.

The weeds are barnyard grass, green bristlegrass and amaranthus retroflexus.

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

(1) the compounding mass ratio of Ephrifenacil to penoxsulam is 1-10: 1-10 hours, the Chinese green tea has a synergistic effect on green bristlegrass; the compounding mass ratio of Epyrefenacil to penoxsulam is 1-5: 1-5 hours, the composition has a synergistic effect on Amaranthus retroflexus; after Ephrifenacil and penoxsulam are used in combination, the use dosage of active ingredients can be effectively reduced, and the weed control effect is improved.

(2) The active ingredients of the agents I-III prepared by the invention have excellent control effects on the paddy field weeds such as barnyard grass, green bristlegrass and amaranthus retroflexus when the dosage is 25g/ha, and the control effects are more than 90%.

Detailed Description

The present invention will be described in detail with reference to examples. In the present invention, the following examples are intended to better illustrate the present invention and are not intended to limit the scope of the present invention. Materials, reagents and the like used in the following examples are commercially available unless otherwise specified.

95% of Epyriffensil raw pesticide (self-made); 98% penoxsulam technical material which is sold on the market.

Example 1: ephrifenacil and penoxsulam compounded setaria viridis indoor bioassay

And (3) testing weeds: herb of common Setaria

The test method comprises the following steps: reference is made to NY/T1155.4-2006, part 4 of the Standard for laboratory bioassay of pesticides, the foliage spray method for determining the activity of herbicides.

The test soil was dosed at 4/5 into the pot. The soil is completely wetted by a basin bottom infiltrating irrigation mode. Uniformly sowing the pretreated weed seeds on the soil surface, covering soil for 1cm, and transferring the weed seeds into a greenhouse for conventional culture after sowing. And water is supplemented by adopting a basin bottom infiltrating irrigation mode. Thinning and fixing the plants after the weeds emerge, and ensuring consistent density of the weeds in the treatment room. Carrying out stem leaf spraying treatment by adopting quantitative spraying equipment at the 2-3 leaf stage of the weeds, repeating the treatment for 4 times and setting a blank control; and (3) naturally airing the liquid medicine on the surface of the treated material, transferring the material into a greenhouse for conventional culture, supplementing water in a basin bottom infiltrating irrigation mode, measuring the fresh weight of the overground part 7 days after the medicine is applied, and calculating the fresh weight control effect of the overground part.

E = (C-T)/C100; wherein E has fresh weight control effect; c, controlling the fresh weight of the overground part of the weed; and T, treating the fresh weight of the overground part of the weed.

Evaluation of the combination of the effects: reference is made to NY/T1155.7-2006, Standard for indoor bioassay of pesticides, Combined action assay for herbicides part 7, mixed.

A Gowing method is adopted to evaluate the synergistic effect, when the E-E0 is more than or equal to 10 percent, the synergistic effect is used, when the E-E0 is less than or equal to 10 percent, the antagonistic effect is used, and when the E-E0 is more than-10 percent, the additive effect is used.

TABLE 1 Epyrifenacil and penoxsulam compounded Setaria viridis indoor bioassay

As can be seen from the table 1, the compound mass ratio of Epyrefoacil to penoxsulam is 1-10: the Chinese herbal medicine composition has a synergistic effect on green bristlegrass herb when the Chinese herbal medicine composition is 1-10 times. Therefore, after Ephrifenacil and penoxsulam are used in combination, the use dosage of active ingredients can be effectively reduced, and the weed control effect is improved.

Example 2: ephrifenacil and penoxsulam compound paired amaranthus retroflexus indoor bioassay

And (3) testing weeds: amaranthus retroflexus (lour.) Merr

The test soil was dosed at 4/5 into the pot. The soil is completely wetted by a basin bottom infiltrating irrigation mode. Uniformly sowing the pretreated weed seeds on the soil surface, covering soil for 1cm, and transferring the weed seeds into a greenhouse for conventional culture after sowing. And water is supplemented by adopting a basin bottom infiltrating irrigation mode. Thinning and fixing the plants after the weeds emerge, and ensuring consistent density of the weeds in the treatment room. Carrying out stem leaf spraying treatment by adopting quantitative spraying equipment at the 2-3 leaf stage of the weeds, repeating the treatment for 4 times and setting a blank control; and (3) naturally airing the liquid medicine on the surface of the treated material, transferring the material into a greenhouse for conventional culture, supplementing water in a basin bottom infiltrating irrigation mode, measuring the fresh weight of the overground part 14 days after the medicine is applied, and calculating the fresh weight control effect of the overground part.

A Gowing method is adopted to evaluate the synergistic effect, when the E-E0 is more than or equal to 10 percent, the synergistic effect is obtained, when the E-E0 is less than or equal to 10 percent, the antagonistic effect is obtained, and when the proportion is more than-10 percent and less than-E0, the additive effect is obtained.

TABLE 2 Ephrifenacil and penoxsulam paired Amaranthus retroflexus indoor bioassay

As can be seen from the table 2, the compound mass ratio of Ephrifenacil to penoxsulam is 1-10: the additive and synergistic effect is shown on the Amaranthus retroflexus at 1-10 times. Wherein the compounding mass ratio of Ephrifenacil to penoxsulam is 1-5: the E-E0 value of the composition to weeds is more than 10 percent at 1-5, the composition shows synergistic effect, and other proportions show additive effect. Therefore, after Ephrifenacil and penoxsulam are used in combination, the use dosage of active ingredients can be effectively reduced, and the weed control effect is improved.

Example 3: epyrefoacil and penoxsulam compound pair paddy field weed field control effect

Target weeds: paddy field weed species: barnyard grass, green bristlegrass, amaranthus retroflexus;

testing the medicament:

an agent I: 20% Ephrifenacil penoxsulam wettable powder, which comprises the following components in percentage by weight: epyrefenacil 15%, penoxsulam 5%, calcium lignosulfonate 4%, polycarboxylate 2%, nekal 2%, white carbon black 5%, and attapulgite for 100%.

And (2) a medicament II: 25% of Epyrefenacil penoxsulam water dispersible granule, which comprises the following components in percentage by weight: 10% of Epyrofenacil, 15% of penoxsulam, 4% of polycarboxylate, 4% of calcium lignosulfonate, 3% of sodium carboxymethylcellulose, 2% of urea and the balance of attapulgite to 100%.

And (3) a medicament III: 10% of Epyrefenacil penoxsulam suspending agent, which comprises the following components in percentage by weight: epyrefenacil 5%, penoxsulam 5%, SP-SC 35%, fatty alcohol-polyoxyethylene ether 2%, farm milk 1601# 2%, xanthan gum 2%, glycerol 4%, organosilicon 1% and water to make up 100%.

The application method comprises the following steps: spraying by a conventional method by adopting a knapsack manual sprayer, and uniformly spraying by adding 600L of water per hectare. Diagonal fixed 5 points per cell, survey 0.25m per point ² And 4, investigating the fresh weight of weeds in each cell fixed point 14 days after the application, and comparing with a control to calculate the fresh weight control effect.

The fresh weight drug effect calculation method comprises the following steps: e = (X0-X1)/X0 × 100%: e is the control effect, X0 is the fresh weight of the blank control area, and X1 is the fresh weight of the residual weeds in the treatment area.

Table 3 Ephrifenacil and penoxsulam compound pair paddy field control effect test results

Test agents	Active ingredient dosage g/ha	Fresh weight of weed (g/m 2)	Total control effect%
				Medicament I	25	66.2	91.4
Agent II	25	55.4	92.8
				Agent III	25	36.9	95.2
CK	-	769.4	-

As can be seen from Table 3, the agents I-III prepared by the invention have excellent control effect on the paddy field weeds such as barnyard grass, green bristlegrass and amaranthus retroflexus when the dosage of the active ingredients is 25g/ha, and the control effect is more than 90%.

Claims

1. A weeding composition containing Ephrifenacil and penoxsulam is characterized in that active ingredients consist of Ephrifenacil and penoxsulam, and the mass ratio of the Ephrifenacil to the penoxsulam is 1-10: 1-10.

2. A herbicidal composition according to claim 1, wherein the mass ratio of Epyrifenacil to penoxsulam is 1-5: 1-5.

3. A pesticidal formulation comprising a herbicidal composition according to any of claims 1 to 2, characterized in that the percentage of active ingredient is 5 to 75% and further comprising agriculturally acceptable adjuvant ingredients.

4. The pesticide formulation as set forth in claim 3 wherein the active ingredient is present in an amount of 15 to 50% by weight.

5. The pesticide preparation of claim 3, wherein the pesticide preparation is in the form of wettable powder, water dispersible granule, soluble powder, suspending agent or dispersible oil suspending agent.

6. Use of the herbicidal composition according to any one of claims 1 to 2 for controlling weeds in paddy fields, wherein the weeds are setaria viridis and amaranthus retroflexus.