CN112790194A

CN112790194A - Weeding composition containing penoxsulam, anilofos and mefenacet

Info

Publication number: CN112790194A
Application number: CN202110036672.8A
Authority: CN
Inventors: 陈琦; 刘言合; 戴权
Original assignee: Anhui Runnongtenghui Biotechnology Co ltd
Current assignee: Anhui Runnongtenghui Biotechnology Co ltd
Priority date: 2021-01-12
Filing date: 2021-01-12
Publication date: 2021-05-14

Abstract

The invention provides a weeding composition containing penoxsulam, anilofos and mefenacet, wherein the active ingredients comprise penoxsulam, anilofos and mefenacet, and the mass ratio of the penoxsulam to the anilofos to the mefenacet is 0.1-1:1-10: 1-20. The weeding composition can be used for preventing and removing annual weeds in the paddy field and has obvious synergistic effect.

Description

Weeding composition containing penoxsulam, anilofos and mefenacet

Technical Field

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

Background

Penoxsulam sulfonamide herbicides act by inhibiting acetolactate synthase (ALS), are absorbed by stems, leaves, buds and roots, are conducted to meristems through xylem and phloem, inhibit plant growth, make growing points green and finally die. The anilofos is a systemic organophosphorus herbicide and is absorbed by root systems and conducted to sprouts or leaves, so that weeds die. Is used for preventing and killing sedge and barnyard grass transplanted in paddy fields. Has strong systemic property and better effect of killing barnyard grass. The mefenacet is an internal absorption conduction type herbicide, is mainly absorbed by coleoptiles and roots and is conducted to young buds and young leaves of weeds through xylem and phloem to prevent the division of cells at the growing points of the weeds and finally cause the death of plants, and is used for preventing and killing annual weeds such as barnyard grass, eyeweed, cyperus heterophyllus and the like in a rice transplanting field.

The long-term single use of the synergistic composition easily causes the drug resistance of weeds, pollutes the environment, and finds the synergistic composition which can improve the weeding effect and reduce the application dosage of active ingredients, thereby being the research and development key point of a plurality of pesticide companies in China. In the prior art, no report is provided about the combined use of penoxsulam, anilofos and mefenacet.

Disclosure of Invention

The weeding composition containing penoxsulam, anilofos and mefenacet and the application thereof have a remarkable synergistic effect. The specific technical scheme is as follows:

a weeding composition containing penoxsulam, anilofos and mefenacet is disclosed, wherein the mass ratio of the penoxsulam to the anilofos to the mefenacet is 0.1-1:1-10: 1-20. The preferable mass ratio of penoxsulam, anilofos and mefenacet is 0.1-0.5:2-8: 5-20. More preferably, the mass ratio of the penoxsulam, the anilofos and the mefenacet is 0.1-0.5:4-8: 5-20.

The mass percentage of the active ingredients in the weeding composition is 1-85%. The preferable mass percentage of the active ingredients is 10-70%.

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

The weeding composition is used for preventing and removing weeds in paddy fields. In particular for the control of annual grassy and broadleaf weeds and cyperaceae weeds.

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

1. the penoxsulam, anilofos and mefenacet compound composition has different combined effects on the barnyard grass. When the mass ratio of penoxsulam, anilofos and mefenacet is 0.1: 2: at 20, the E-E0 value was 9.51, showing an additive effect. Other proportioning ranges show synergistic effect; can effectively reduce the dosage of active ingredients and slow down the drug resistance of weeds. 2. The penoxsulam, anilofos and mefenacet compound composition has good control effect on cockspur grass, monochoria vaginalis and cyperus heterotropus in paddy fields; and is safe to rice crops.

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 illustrative only and should not be taken as limiting the invention as described in detail in the claims

Example 1: penoxsulam, anilofos and mefenacet compounded for indoor determination of barnyard grass

The tested weeds: and (4) collecting barnyard grass, collecting mature seeds in the field, carrying out laboratory culture, and preserving after desensitization treatment.

Reagent to be tested: penoxsulam, anilofos and mefenacet; 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 barnyard grass seeds in a flowerpot, and covering soil for 1cm after sowing. And (5) performing soil spraying treatment 24h after sowing according to the experimental design dosage (a spraying system adopts a TEEJET-9503EVS fan-shaped spray head, the spraying pressure is 275kPa, the liquid spraying amount is 450L/hm2, and the distance between the spray head and the plant is 50 cm). The experiment was repeated 3 times. After the test material is treated, the test material is placed in a greenhouse to be managed according to a conventional method, the fresh weight of the overground part of each treated weed is weighed 21 days after the treatment, and the fresh weight inhibition percentage is calculated. 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, the content of E-E0 < -10 percent is antagonistic effect, and the content of E-E0 is additive effect between-10 percent and 10 percent.

And (4) analyzing results: the penoxsulam, anilofos and mefenacet compound composition has different combined effects on the barnyard grass. When the mass ratio of penoxsulam, anilofos and mefenacet is 0.1: 2: at 20, the E-E0 value was 9.51, showing an additive effect. Other mixture ratio ranges show synergistic effect.

TABLE 1 indoor assay results for barnyard grass with penoxsulam, anilofos and mefenacet compounded composition

EXAMPLE 2 formulation

20% penoxsulam, anilofos and mefenacet emulsifiable concentrate

1% of penoxsulam, 8% of anilofos, 11% of mefenacet, 500# 8% of agricultural milk, 600# 4% of agricultural milk, 5% of sodium lignosulphonate and the balance of methyl oleate, wherein the total content is 100%.

16% penoxsulam, anilofos, mefenacet suspension

1% of penoxsulam, 5% of anilofos, 10% of mefenacet, 8% of NNO, 7% of sodium dodecyl benzene sulfonate, 1601# 5% of farm milk, 4% of sodium carboxymethyl cellulose, 3% of organic silicon, 3% of glycol, 1% of benzoic acid, 3% of bentonite and the balance of deionized water to 100%.

52% penoxsulam, anilofos and mefenacet wettable powder

2% of penoxsulam, 15% of anilofos, 35% of mefenacet, 6% of sodium dodecyl benzene sulfonate, 5% of polycarboxylate, 4% of calcium lignosulfonate, 4% of white carbon black and the balance of kaolin soil to 100%.

20.5% penoxsulam anilofos mefenacet dispersible oil suspending agent

0.5% of penoxsulam, 7% of anilofos, 13% of mefenacet, 6% of sodium dodecyl benzene sulfonate, 8% of calcium lignosulfonate, 2% of organic bentonite, 4% of glycerol and the balance of vegetable oil to 100%.

Example 4 measurement of field efficacy of penoxsulam, anilofos and mefenacet

And (3) test crops: weeds in rice fields: barnyard grass, monochoria vaginalis and cyperus rotundus.

The application method comprises the following steps: 4 drug treatments were set, 1 blank control, repeated 3 times; the area per cell was 20m2, and the random arrangement was made. And (4) carrying out soil spraying treatment by adopting a sprayer. And (5) investigating the weed fresh weight control effect 21d after the application.

And (4) analyzing results: the penoxsulam, anilofos and mefenacet compound composition has a good control effect on weeds such as barnyard grass, monochoria vaginalis and cyperus heterotropoides in rice fields.

Table 2 herbicidal Effect of the compounded preparations on paddy 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 weeding composition containing penoxsulam, anilofos and mefenacet is characterized in that the mass ratio of the penoxsulam to the anilofos to the mefenacet is 0.1-1:1-10: 1-20.

2. A herbicidal composition according to claim 1, wherein the mass ratio of penoxsulam, anilofos and mefenacet is 0.1-0.5:2-8: 5-20.

3. A herbicidal composition according to claim 2, characterized in that the mass ratio of penoxsulam, anilofos and mefenacet is 0.1-0.5:4-8: 5-20.

4. A herbicidal composition according to any one of claims 1 to 3, characterized in that the active ingredient is present in an amount of 1 to 85% by weight.

5. A herbicidal composition according to claim 4, characterized in that the active ingredient is present in an amount of 10 to 70% by weight.

6. The weeding composition according to claim 4, wherein the weeding composition is mixed with the common auxiliary materials on the pesticides to prepare any preparation suitable for agriculture.

7. A herbicidal composition according to claim 6, wherein said formulation is selected from the group consisting of emulsifiable concentrates, water dispersible granules, wettable powders, suspensions, microemulsions, and oil dispersible suspensions.

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

9. Use of a herbicidal composition according to claim 8, characterized in that the weeds are annual grasses and broadleaf weeds and sedge weeds.