CN111226943A

CN111226943A - Weeding composition containing quinclorac, topramezone and terbuthylazine

Info

Publication number: CN111226943A
Application number: CN202010185141.0A
Authority: CN
Inventors: 张习奇
Original assignee: Anhui Meicheng Chemical Co ltd
Current assignee: Anhui Meicheng Chemical Co ltd
Priority date: 2020-03-17
Filing date: 2020-03-17
Publication date: 2020-06-05

Abstract

A weeding composition containing quinclorac, topramezone and terbuthylazine. The invention provides a herbicide composition, which contains quinclorac, topramezone and terbuthylazine, wherein the weight ratio of the quinclorac to the topramezone to the terbuthylazine is 1-20:1: 5-30; can be used for preventing and controlling annual weeds in corn fields and has obvious synergistic effect.

Description

Weeding composition containing quinclorac, topramezone and terbuthylazine

Technical Field

The invention belongs to the field of pesticides, and particularly relates to a weeding composition and application thereof.

Background

The quinclorac herbicide with strong quinclorac selectivity is mainly used for preventing and killing barnyard grass in rice fields. Can also prevent and kill the Potentilla fruticosa, sesbania, cress, monochoria vaginalis and Chinese honeylocust fruit, has special effect on barnyard grass, has high efficiency on 4-7-year-old barnyard grass, but has poor effect on annual sedge weeds, and has drug resistance on perennial sedge. Topramezone is a triketone post-emergence stem and leaf treating agent. The herbicide has systemic and conductive effects, and can be absorbed by leaves, roots and stems of plants. Broad herbicide controlling spectrum, and preventing and killing annual gramineous weeds and broad-leaved weeds in corn fields. The control effect is rapid, the effect can be obtained 2 to 5 days after the drug is taken, and the lasting period is longer. The corn flour shows better safety to various varieties of corns (field corn, sweet corn and popcorn corn), and is safe to crops under the normal use condition. Terbuthylazine is a triazine herbicide, has a selective systemic conduction effect, is mainly absorbed by roots of plants and conveyed to green leaves to inhibit photosynthesis for preventing and removing most weeds, and has high safety.

In the prior art, the combination of two or more than two active ingredients is used, the generation of drug resistance is slowed down, and the use amount of pesticides is reduced, which is a hot point of pesticide compounding in China at present. Previous research by the applicant has found that there is no report in the prior art relating to the preparation of a herbicide composition by combining quinclorac, topramezone and terbuthylazine. The applicant has found that the combined use of quinclorac, topramezone and terbuthylazine shows a superior technical effect compared to binary compositions.

Disclosure of Invention

The invention provides a weeding composition which contains quinclorac, topramezone and terbuthylazine and can be used for preventing and removing crop weeds.

The invention is realized by the following modes:

a weeding composition contains quinclorac, topramezone and terbuthylazine, wherein the weight ratio of the quinclorac to the topramezone to the terbuthylazine is 1-20:1: 5-30.

Preferably, the weight ratio of the quinclorac, the topramezone and the terbuthylazine in the weeding composition is 5:1:20 and 15:1: 25.

The dosage form of the weeding composition provided by the invention is wettable powder, water dispersible granules, a suspending agent, missible oil and dispersible oil suspending agent.

The weeding composition provided by the invention comprises 5-70% of active ingredients in percentage, and the balance of auxiliary materials or carriers acceptable for pesticides.

The weeding composition provided by the invention is used for preventing and controlling crop weeds. The crops are preferably field crops such as corn, rice and the like; the weeds are preferably: crabgrass, goosegrass, barnyard grass, monochoria vaginalis and amaranthus retroflexus annual weeds.

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

the quinclorac, the topramezone and the terbuthylazine belong to herbicidal active compounds with different compound structures and different action mechanisms, and after the quinclorac, the topramezone and the terbuthylazine are combined for use, the composition shows remarkable synergistic effect and has better herbicidal effect than a single agent or a binary combination. The weeding composition can be used for preventing and removing weeds in a corn field, and is safe to corn crops when observed and found in the field; can be popularized and used, can effectively reduce the dosage of active ingredients and slow down the generation of drug resistance of weeds.

Detailed Description

The following detailed description of specific embodiments of the present invention is provided in conjunction with examples, but it should be understood that the scope of the present invention is not limited to the specific embodiments.

EXAMPLE 1 indoor toxicity assay for Echinochloa crusgallic acid, topramezone and terbuthylazine

The tested weeds: barnyard grass

The test method comprises the following steps: and (3) sowing barnyard grass seeds in the plastic pots, carrying out seedling and plant setting in the 2-leaf period, reserving 20 barnyard grass with consistent growth potential in each pot, and treating the barnyard grass when the barnyard grass grows to 3-4 leaf period. A series of single agents with different concentrations and different mixture ratios are prepared, and stem and leaf spray treatment (spray volume of 50mL/m2) is carried out by a potter spray device, and the treatment is repeated for 4 times. After treatment, the barnyard grass is placed in a greenhouse for normal management, the growth condition of the barnyard grass is regularly observed, the fresh weight of the overground part of the barnyard grass is weighed after 14 days, the fresh weight inhibition rate is calculated, a linear regression equation and ED50 with different combinations are solved according to the relationship between the fresh weight inhibition rate and the medicament concentration, and the combined action type of the three on the barnyard grass is evaluated after the three are mixed.

TABLE 1 determination of indoor toxicity of quinclorac, topramezone and terbuthylazine on barnyard grass

As can be seen from Table 1, the combination of quinclorac, topramezone and terbuthylazine has good control effect on barnyard grass, wherein when the proportion of the quinclorac, the topramezone and the terbuthylazine is 1-20:1:5-30, the composition shows synergistic effect on the barnyard grass, the proportion of the quinclorac, the topramezone and the terbuthylazine is 5:1:20, the proportion of the quinclorac, the topramezone and the terbuthylazine is 15:1:25, the composition shows remarkable synergistic effect on the barnyard grass, and particularly, the CTC value is more than 150. Therefore, the combined use of the three or more components can effectively reduce the use dosage of the active components, slow down the generation of drug resistance of weeds and reduce environmental pollution.

Example 2 determination of the control of Dichloroquinolinic acid, topramezone and terbuthylazine on the potted plants in the large intestine

The tested weeds: tang style food

The test method comprises the following steps: sowing seeds of the large crabgrass in a plastic pot, thinning and fixing the seeds after a certain time, reserving 20 weeds with consistent growth vigor in each pot, and treating the weeds until the weeds grow to 2-3 leaf stages. Spray treatment of stem and leaf was carried out using a potter spray apparatus (amount of spray 50mL/m2, treatment dose shown in Table 2), and the treatment was repeated 4 times. And after treatment, placing the treated crabgrass in a greenhouse for normal management, regularly observing the growth condition of the crabgrass, weighing the fresh weight of the overground part of the crabgrass after 14 days, and calculating the fresh weight inhibition rate.

Test agents:

a drug A: 41% diphenone-super wettable powder (quinclorac 15%, topramezone 1%, terbuthylazine 25%, calcium lignosulphonate 5%, naphthalenesulphonate 7%, white carbon black 15%, attapulgite to make up 100%)

And (3) a medicament B: 52% diphenone-super water dispersible granule (10% quinclorac, 2% topramezone, 40% terbuthylazine, 7% sodium dodecyl benzene sulfonate, 5% NNO, 1% naphthalenesulfonate formaldehyde condensate, 3% urea, 4% sodium carboxymethylcellulose, 4% white carbon black, and 100% bentonite)

And (3) a medicament C: 21% of dibenzenone-super dispersible oil suspending agent (10% of quinclorac, 1% of topramezone, 10% of terbuthylazine, 5006% of agricultural emulsion, 5% of anhydrous sodium benzoate, 6% of fatty alcohol-polyoxyethylene ether, 3% of organic bentonite and 100% of methyl oleate complement)

A drug D: 22% benzophenone-tezine dispersible oil suspending agent (2% of topramezone, 20% of terbuthylazine, 5006% of pesticide emulsion, 5% of anhydrous sodium benzoate, 6% of fatty alcohol-polyoxyethylene ether, 3% of organic bentonite and 100% of methyl oleate complement)

And (3) a medicament E: 25% quinclorac dispersible oil suspending agent

TABLE 2 determination of indoor potting control of crabgrass by cloquintocet, topramezone and terbuthylazine

As can be seen from the table 1, the combined use of the quinclorac, the topramezone and the terbuthylazine has good control effect on crab grass, and compared with single-dose and binary mixing, the ternary composition has obvious synergistic effect and can obviously improve the control effect.

Example 3 field efficacy assay

Test subjects: the corn field crabgrass, goosegrass herb, barnyard grass, monochoria vaginalis and amaranthus retroflexus annual weeds.

The test method comprises the following steps: spraying stem and leaf. A random block arrangement was used, 30m2 per cell, repeated 4 times. 4 survey points are determined in each district according to a checkerboard sampling method, each point is 0.25m2, the control effect is surveyed 14d after the drug is taken, the overground part of the weed at each sampling point is collected, and the fresh quality of the overground part is measured. Each treatment plot was compared with a control plot of clear water to evaluate the weed control effect of each agent treatment.

TABLE 3 determination of field control efficacy

As can be seen from Table 3, the ternary complex formulation composition of the invention has excellent control effect on annual weeds such as corn field crabgrass, goosegrass, barnyard grass, monochoria vaginalis and amaranthus retroflexus, and the average control effect is about 90%. Can effectively reduce the dosage of active ingredients, improve the prevention and treatment effect and slow down the generation of drug resistance.

While the foregoing is directed to embodiments of the present invention, other and further embodiments of the invention may be devised without departing from the basic scope thereof, and the scope thereof is determined by the claims that follow.

Claims

1. A weeding composition is characterized by comprising quinclorac, topramezone and terbuthylazine, wherein the weight ratio of the quinclorac to the topramezone to the terbuthylazine is 1-20:1: 5-30.

2. The weeding composition according to claim 1, wherein the weight ratio of quinclorac to topramezone to terbuthylazine is 5:1:20 to 15:1: 25.

3. A herbicidal composition according to any one of claims 1 to 2, wherein the herbicidal composition is in the form of wettable powder, water dispersible granule, suspension, emulsifiable concentrate, or dispersible oil suspension.

4. A herbicidal composition according to claim 3, characterized in that the percentage of active ingredients is 5% to 70%.

5. Use of the herbicidal composition according to any one of claims 1 to 4 for controlling crop weeds.

6. The use according to claim 5, the crop being maize.