阅读说明：本技术 一种包含三氟苯嘧啶和溴虫氟苯双酰胺的组合物及其应用 (Composition containing trifluorobenzene pyrimidine and bromofenoxanil and application thereof ) 是由 汪云强 朱怀铜 尚朝 葛敏 徐俊采 梅洪玲 吴文静 黄永灿 于 2021-01-26 设计创作，主要内容包括：本发明提供一种包含三氟苯嘧啶和溴虫氟苯双酰胺的组合物,三氟苯嘧啶和溴虫氟苯双酰胺的质量配比为1:20-20:1；所述的组合物用于防治作物虫害；特别是用于小菜蛾、稻飞虱、叶蝉、稻纵卷叶螟、二化螟、三化螟、稻蓟马、稻潜叶蝇的防治。(The invention provides a composition containing trifluorobenzene pyrimidine and bromofenoxanil, wherein the mass ratio of the trifluorobenzene pyrimidine to the bromofenoxanil is 1:20-20: 1; the composition is used for controlling crop pests; in particular to the prevention and treatment of diamond back moth, rice planthopper, leafhopper, rice leaf roller, chilo suppressalis, tryporyza incertulas, rice thrips and rice leaf miner.)

1. The composition containing the trifluorobenzene pyrimidine and the bromofenoxanil is characterized in that the mass ratio of the trifluorobenzene pyrimidine to the bromofenoxanil is 1:20-20: 1.

2. The composition of claim 1, wherein the mass ratio of trifluorobenzene pyrimidine to bromoxynil bisamide is 1:5-5: 1.

3. The composition as claimed in claim 2, wherein the mass ratio of the trifluorobenzene pyrimidine to the bromoxynil bisamide is 1:1-1: 5.

4. The composition according to any one of claims 1 to 3, further comprising an agriculturally suitable adjuvant; the percentage content of the active ingredients is 5-90%.

5. The composition of claim 4, wherein the composition is in the form of wettable powder, water dispersible granule, dispersible oil suspension, suspending agent, granule or microemulsion.

6. Use of a composition according to any one of claims 1 to 5 for controlling insect pests on crops.

7. The use as claimed in claim 6, wherein the insect pest is diamondback moth, rice planthopper, leafhopper, rice leaf roller, chilo suppressalis, tryporyza incertulas, rice thrips and rice leaf miner.

Technical Field

The invention belongs to the field of pesticides, and particularly relates to a composition containing trifluorobenzene pyrimidine and bromofenoxanil and application thereof.

Background

The problem of pesticide resistance of agricultural pests is a global problem and is always a key topic concerned by agricultural science and technology workers. With the continuing of one year or another year of chemical control of mite pests, the increasing of the usage amount of pesticides, the influence of unscientific use of pesticides and other factors, the resistance of pests is increasingly serious, and the types of pests generating resistance are continuously increased. Meanwhile, due to the high-strength use of pesticides, a series of problems of overproof pesticide residues of agricultural products, aggravation of environmental pollution, increase of pesticide cost of farmers and the like are caused, and the sustainable development of agriculture is not facilitated. Therefore, the compound preparation with high efficiency, low toxicity, low residue, different action mechanisms and synergistic interaction is developed, which is not only beneficial to delaying the generation of drug resistance of pests, but also can prolong the service life of pesticide varieties, reduce the use dosage, save the cost and reduce the pollution to the environment.

Trifluoropyrimidine is a novel mesoionic pesticide developed by DuPont. The compound acts on an acetylcholine receptor, is different from a neonicotinoid insecticide, can effectively control lepidoptera and homoptera pests, and has the characteristics of high efficiency, safety, environmental friendliness and the like; the insecticidal composition is used for preventing and treating rice planthoppers, leafhoppers and the like, in particular brown planthoppers.

The flubendiamide is an insecticide with a brand new action mechanism of a diamide structure, inhibits the nerve transmission of target insects through stomach toxicity and contact killing, causes convulsion and finally dies; can effectively prevent and control diamond back moth and yellow flea beetle of Chinese cabbage and cabbage.

The inventor of the invention has conducted intensive research on screening of a compound formula of trifluorophenylpyrimidine and bromofenoxaprop-p-fluorobenzenediamide, finds that the compound composition has an obvious synergistic effect within a certain compound proportion range, and meanwhile has a beneficial control effect on various agricultural pests in the actual use process, and further researches complete the invention.

Disclosure of Invention

The invention particularly relates to a composition containing trifluorobenzene pyrimidine and bromofenoxanil and application thereof. The specific technical scheme is as follows:

a composition containing trifluorobenzene pyrimidine and bromofenoxanil is characterized in that the mass ratio of the trifluorobenzene pyrimidine to the bromofenoxanil is 1:20-20: 1. The preferable mass ratio of the trifluoro-fluoropyrimidine to the flubendiamide is 1:5-5: 1. More preferably, the mass ratio of the trifluorobenzene pyrimidine to the bromofenoxanil is 1:1-1: 5.

The composition further comprises agriculturally suitable excipients; the percentage content of the active ingredients is 5-75%. The dosage form of the composition is wettable powder, water dispersible granules, suspending agents, granules and microemulsion.

The use of said composition for controlling insect pests in crops; the insect pests are diamondback moth, rice planthopper, leafhopper, rice leaf roller, chilo suppressalis, tryporyza incertulas, rice thrips and rice leaf miner.

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

the trifluoro-benzene pyrimidine and the brofenben-zamide have different action mechanisms, and the drug resistance of the medicament can be slowed down after the two components are combined for use; when the mass ratio of the trifluoro-fluoropyrimidine to the brofenben fluorobenzene diamide is 1:1-1:5, the composition has a synergistic effect on diamondback moths; can effectively reduce the dosage of active ingredients and reduce environmental pollution.

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 measurement of indoor toxicity of Complex pairing of Trifluoropyrimidine and Bromocha-fluorobenzenediamide to Plutella xylostella

Reagent to be tested: a trifluorobenzene pyrimidine raw drug and a bromofenoxanil raw drug (purchased on the market);

a test insect source: collecting diamondback moth in field, and breeding for multiple generations indoors; during the test, healthy 3-instar larvae with consistent sizes are selected for toxicity measurement;

designing a test medicament:

TABLE 1 compounding ratio of trifluorobenzene pyrimidine and bromofenoxanil

Test method and data processing:

the leaf soaking method is adopted. Selecting fresh and normal cabbage leaves, soaking in the liquid medicine with each treatment mass concentration for 10s, taking out, drying in the air, placing in culture dishes with wet filter paper and 12cm diameter, inoculating 10 heads of 3-year-old plutella xylostella larvae with the same size into each culture dish as test insects, repeating each mass concentration for 3 times, taking clear water as a control, and feeding at the temperature of 26 +/-2 ℃ in an environment. And after 48h, recording the total number of the insects and the number of dead insects, calculating and correcting the death rate, and solving a virulence regression equation and an LC50 value by using a few-rate value analysis method. The synergistic effect of the mixture is determined by the Sun Yunpei method.

Test results and analysis

TABLE 2 determination of the indoor toxicity of the compounded agents against plutella xylostella and their combined action

As can be seen from table 2, trifluorophenylpyrimidine and bromofenoxanil exhibit different combined effects on plutella xylostella at different ratios; when the mass ratio of the trifluoro-fluoropyrimidine to the brofenben fluorobenzene diamide is 1:1 and 1:5, the composition has a synergistic effect on diamondback moths; the rest of the mixture ratio shows additive effect.

Example 2 Compound of Trifluoropyrimidine and Bromochongfluorobenzenediamide for controlling Rice planthopper in field

The test method comprises the following steps: in the test, the rice planthopper is in the low-age nymph full-length stage, 3 brown planthoppers, sogatella furcifera and 3 gray planthoppers are mixed, and the brown planthopper is taken as a dominant population. Each test cell was arranged in random blocks, the area of the cell was 40m2, and the spray treatment was repeated 3 times. Irrigating 5cm before applying pesticide, and maintaining 3-5cm water layer for 5 days after applying pesticide. The population number of insects was investigated before application, and the drug control effect was investigated 14 days after application. Each cell adopts 15-point sampling by an interlaced skipping method, and each point investigates 2 clusters for 30 clusters. And calculating the prevention and treatment effect of each medicament treatment area:

testing the medicament:

agent 1: 20% trifluoro-bromophora wettable powder (based on weight percentage)

10% of trifluorobenzene pyrimidine, 10% of bromofenoxanil, 8% of sodium lignin sulfonate, 6% of NNO, 4% of white carbon black and 100% of kaolin.

Medicament 2: 30% trifluoro-bromophora wettable powder (based on weight percentage)

5% of trifluoro-benzene pyrimidine, 25% of bromofenoxanil, 8% of sodium lignosulfonate, 6% of nekal BX, 4% of sodium carboxymethylcellulose, 2% of urea, 4% of white carbon black and 100% of kaolin.

Agent 3: 10% of trifluorfluoropyrimidine suspending agent

Medicament 4: 100 g/l brobenaote fluorobenzene bisamide suspending agent

Test results and analysis

TABLE 3 field control of rice planthopper with compounded chemical

As can be seen from Table 3, the field control effect of the single use of 10% of trifluorobenzene pyrimidine suspending agent and 100 g/L of bromofenoxanil suspending agent on rice planthopper is only 50.3% and 45.1%; when the two are used in combination, the control effect is obviously improved, and the synergistic effect is obvious.

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.