Insecticidal composition and application thereof

Abstract

The invention provides an insecticidal composition and application thereof, and belongs to the technical field of compound pesticides. The active ingredients of the composition are composed of the methylthio diafenthiuron and the afidopyropen, and the mass ratio of the methylthio diafenthiuron to the afidopyropen is 1: (0.1-30). The insecticidal composition disclosed by the invention has an excellent control effect on piercing-sucking mouthpart pests, is good in fast-acting property and persistent effect and is environment-friendly.

Description

Technical Field

[0001] The invention belongs to the technical field of compound pesticides, and specifically relates to an insecticide composition and application thereof. Background Art

[0002] Piercing-sucking pests have always been a difficult problem in agricultural control. Due to the single action site of the agent and the unscientific use of pesticides, piercing-sucking pests have developed a high resistance to the currently used chemical pesticides. If pesticides are applied frequently and in large quantities, the production cost will increase and the environmental pollution will be aggravated. Therefore, agricultural production urgently needs an insecticide composition for piercing-sucking pests that has high prevention effect, good rapid effect and long-lasting effect, and is environmentally friendly. Summary of the invention

[0003] The object of the present invention is to provide an insecticidal composition which has excellent control effect on piercing-sucking mouthparts pests, has good rapid and long-lasting effect, and is environmentally friendly.

[0004] In order to solve the above technical problems, the inventors conducted a large number of indoor biological activity assays and screenings and unexpectedly discovered that the combination of methylthiobutyl ether urea and diprofenocic acid within a certain range has an unexpected synergistic effect on drug-resistant piercing-sucking mouthparts pests.

[0005] The invention provides an insecticidal composition. The active ingredients of the composition consist of methylthiobutyric acid urea and diprofenocic acid. The mass ratio of methylthiobutyric acid urea to diprofenocic acid is 1:0.1-30.

[0006] In the preferred technical solution, the mass ratio of methylthiocarbamide to diprofenoxam is 1:1-30.

[0007] In the present invention, the mass percentage of the active ingredient in the insecticide composition is 5-80%. The insecticide composition also contains pesticide adjuvants, and the dosage form of the insecticide composition is emulsifiable concentrate, suspension concentrate, suspoemulsion, wettable powder, water emulsion, microemulsion, water dispersible granules, oil suspension or seed coating agent. The pesticide adjuvant is one or more of a solvent, a dispersant, an emulsifier and a carrier.

[0008] The present invention also provides the use of the insecticide composition in controlling crop pests. The crops are one or more of fruit trees, vegetables, medicinal materials, rice, cotton and tea trees. The pests are piercing-sucking mouthparts pests, including aphids, thrips, whiteflies and leafhoppers.

[0009] Compared with the prior art, the present invention has the following beneficial effects: (1) Compared with a single agent, the composition of the present invention has excellent preventive effect on piercing-sucking pests, significantly improving the application effect; (2) In the composition of the present invention, the two active ingredients have completely different action mechanisms, which is conducive to overcoming the generation of pest resistance and helping to control resistant pests; (3) Compared with methylthiobutyl ether urea, the composition of the present invention significantly improves the duration of effect, and has good rapid effect relative to diprofil. (4) Since the composition of the present invention can ensure high efficiency at a relatively low concentration and significantly prolongs the duration of effect, it can reduce the amount of medicine used and the number of times of use, reduce the cost of use, reduce environmental pollution and pesticide residues, and is environmentally friendly. DETAILED DESCRIPTION

[0010] In order to make the purpose, technical solutions and beneficial results of the present invention clearer, the present invention is illustrated by the following specific embodiments, but the present invention is by no means limited to these examples, and any modifications made within the spirit and principles of the present invention should be within the protection scope of the present invention.

[0011] The composition of the present invention uses methylthiobutyric acid urea and dimethoate as effective ingredients, and the combination of them has an extremely significant synergistic effect on resistant aphids, which is specifically described by an indoor activity test example.

[0012] Example 1 Determination of the toxicity of the combination of methylthiocarbamide and dimethoate to resistant aphids

[0013] The purpose of this experiment was to detect the toxicity of the combination of methylthiocarbamide and dimethoate to resistant aphids.

[0014] Test object: Resistant aphids (more than 800 times resistant to imidacloprid).

[0015] Test method: Refer to the agricultural industry standard of the People's Republic of China NY / T1154.7-2006.

[0016] DPS data processing software was used for statistical analysis and calculation of the LC of each drug. 50 , calculate the co-toxicity coefficient (CTC). If the co-toxicity coefficient is greater than 120, it is a synergistic effect; if it is close to 100, it is an additive effect; and if it is less than 80, it is an antagonistic effect.

[0017] The test results (Table 1) show that when the mass ratio of methylthiobutyric acid urea and dimethoate is 1:1 to 5:1, there is a significant synergistic effect, especially when the mass ratio is 1:10, the co-toxicity coefficient is as high as more than 200, and the synergistic effect is extremely significant.

[0018] Table 1 Results of indoor toxicity test of different treatments against resistant aphids

[0019] deal with <![CDATA[LC 50 ]]> ATI TTI CTC Methylthiobutane urea (abbreviated as J) 0.96 Dipropenil lipid (abbreviated as S) 1.24 J:S=1:1 0.69 206.5 115.7 173.7 J:S=1:5 0.51 212.4 118.1 181.3 J:S=1:10 0.33 397.8 188.9 206.8 J:S=1:20 0.36 353.6 203.6 169.2 J:S=1:30 0.56 216.5 119.3 185.1 J:S=5:1 0.98 149.8 105.5 137.3 J:S=10:1 1.15 129.2 101.6 117.9

[0020] Note: J:S in Table 1 is the mass ratio of methylthiobutyric acid urea to dimethoate. ATI-measured toxicity index of the mixture, TTI-theoretical toxicity index of the mixture.

[0021] The active ingredients of the insecticide composition of the present invention, methylthiobutyric acid urea and diprofenopipron, can be prepared into pesticide dosage forms allowed by adding pesticide adjuvants, including but not limited to emulsifiable concentrates, suspensions, suspoemulsions, wettable powders, water emulsions, microemulsions, water-dispersible granules, and seed coating agents; the dosage forms that are more conducive to the exertion of drug efficacy and are environmentally friendly are microemulsions, suspensions, oil suspensions, and water-dispersible granules.

[0022] Example 2 7.5% butylthiocarbamide dichlorvos microemulsion

[0023] 7.5% butylthiocarbamide diprofenoxam microemulsion is composed of the following components in parts by mass:

[0024]

[0025] After the active ingredients (butylthiocarb and cyclohexanone) are dissolved in cyclohexanone, an antioxidant is added and stirred until uniform and transparent, an emulsifier is added, stirred evenly, and then water is added to prepare a 7.5% butylthiocarb microemulsion of cyclohexanone.

[0026] The 7.5% methylthiobutyric acid urea microemulsion was diluted 2500 times with water and sprayed. The control effects on aphids were 86.5%, 97.4% and 95.8% on the 1st, 7th and 15th days after the application. The commercially available 5% methylthiobutyric acid urea microemulsion 1000 times and 5% urea dispersible liquid 1500 times were diluted with water and sprayed on different experimental plots. Under the same conditions, the control effects of 5% methylthiobutyric acid urea microemulsion and 5% urea dispersible liquid on aphids were calculated. Results: The control effects of 5% methylthiobutyric acid urea microemulsion and 5% urea dispersible liquid on aphids were 77.3% and 64.4% on the first day after the application, 67.9% and 87.5% on the 7th day after the application, and 61.5% and 81.3% on the 15th day after the application. Therefore, it can be seen that the synergistic effect of the combination of methylthiobutyric acid urea and dichlorvos propoxyphene is very significant, the preventive effect on aphids is greatly improved, and the rapidity and persistence of the effect are better than those of a single agent.

[0027] Example 3 30% butylthiocarbamide dichlorvos suspension

[0028] The 30% methylthiobutyl urea dimethoate suspension is composed of the following components in parts by mass:

[0029]

[0030]

[0031] After adding measured water into the stirring tank, tristyrylphenol polyoxyethylene ether phosphate, active ingredients (methylthiobutyl urea and dimethoate), xanthan gum, preservatives and antioxidants are added in sequence, and shear stirring is performed for 30 minutes. Three sand mills are connected in series for sand milling to obtain a 30% methylthiobutyl urea dimethoate suspension.

[0032] 30% methylthiobutyric acid sulfocarbamide suspension was used to control thrips. 30% methylthiobutyric acid sulfocarbamide suspension was diluted 3000 times with water and sprayed. The control effect on thrips was 91.2%, 98.4% and 96.5% at 1 day, 7 days and 15 days after spraying. In addition, 5% methylthiobutyric acid sulfocarbamide microemulsion 1000 times and 5% sulfocarbamide dispersible liquid 1500 times were diluted with water and sprayed on different experimental plots. Under the same conditions, the control effect of 5% methylthiobutyric acid sulfocarbamide microemulsion and 5% sulfocarbamide dispersible liquid on thrips was calculated. Results: The control effects of 5% methylthiobutyric acid urea microemulsion and 5% cyclohexyl dispersible liquid were 68.4% and 58.4% one day after application, 57.9% and 86.3% 7 days after application, and 48.2% and 77.7% 15 days after application. Therefore, it can be seen that the synergistic effect of methylthiobutyric acid urea and cyclohexyl is very significant, and the control effect on thrips is greatly improved, and the rapidity and persistence are better than single agent.

[0033] Example 4 18% butylthiocarbamide dimethoate oil suspension

[0034] 18% butylthiocarbamide dimethoate oil suspension is composed of the following components in parts by mass:

[0035]

[0036] After adding measured methylated vegetable oil into a stirring kettle, emulsifiers (calcium dodecylbenzene sulfonate and castor oil polyoxyethylene ether), active ingredients (butylthiocarbamide and cyclohexyl), organic bentonite and antioxidants are added in sequence, and shear stirring is performed for 30 minutes. Three sand mills are connected in series for sand milling to obtain an 18% butylthiocarbamide cyclohexyl oil suspension.

[0037] 18% methylthiobutyric acid urea-dimethoxypyrim oil suspension was used to control eggplant whiteflies. The experimental location was a greenhouse in Shouguang, Shandong. 18% methylthiobutyric acid urea-dimethoxypyrim oil suspension was diluted 3000 times with water and sprayed. The control effects on whiteflies were 93.2%, 97.6% and 95.3% at 1, 7 and 15 days after the spraying, respectively. 5% methylthiobutyric acid urea microemulsion 1000 times and 5% dimethoxypyrim dispersible liquid were diluted 1500 times with water and sprayed on different experimental plots. Under the same conditions, the control effects of 5% methylthiobutyric acid urea microemulsion and 5% dimethoxypyrim dispersible liquid on whiteflies were calculated. Results: The control effects of 5% methylthiobutyric acid urea microemulsion and 5% dimethoate dispersible liquid on whiteflies were 75.2% and 59.9% one day after application, 67.6% and 88.6% 7 days after application, and 58.4% and 80.9% 15 days after application. Therefore, it can be seen that the synergistic effect of methylthiobutyric acid urea and dimethoate after compounding is very significant, and the control effect on whiteflies is greatly improved, and the rapidity and persistence are better than single agent.

[0038] Example 5 45% butylthiocarbamide water dispersible granules

[0039] 45% butylthiocarbamide water dispersible granules are composed of the following components in parts by mass:

[0040]

[0041] The measured active ingredients (butylthiocarb and dimethoate), sodium dodecylbenzenesulfonate, NNO, BHT, styrene acrylic polymer and corn starch are added into a mixing kettle and mixed for 45 minutes, and then air flow crushed, water is added for extrusion granulation, and the mixture is dried and sieved to obtain 45% butylthiocarb water dispersible granules of dimethoate.

[0042] 45% methylthiobutyric acid urea water dispersible granules were used to control tea green leafhoppers. The experimental location was Hangzhou, Zhejiang. 45% methylthiobutyric acid urea water dispersible granules were diluted 10,000 times with water and sprayed. The control effects on tea green leafhoppers were 94.7%, 100% and 99.1% on the 1st, 7th and 15th days after the spraying, respectively. 5% methylthiobutyric acid urea microemulsion 1000 times and 5% urea dispersible liquid 1500 times were sprayed on different experimental plots. Under the same conditions, the control effects of 5% methylthiobutyric acid urea microemulsion and 5% urea dispersible liquid on tea green leafhoppers were calculated. Results: The control effects of 5% methylthiobutyric acid urea microemulsion and 5% dimethoate dispersible liquid on tea green leafhoppers were 88.7% and 67.3% one day after application, 77.4% and 89.3% 7 days after application, and 60.3% and 81.7% 15 days after application. Therefore, it can be seen that the synergistic effect of methylthiobutyric acid urea and dimethoate after compounding is very significant, and the control effect on tea green leafhoppers is greatly improved, and the rapidity and persistence are better than single agent.

Claims

1. An insecticidal composition, characterized in that: The active ingredients of the composition consist of methylthiobutyric acid urea and dimethoate, and the mass ratio of methylthiobutyric acid urea to dimethoate is 1:0.1-30.

2. The insecticidal composition according to claim 1, characterized in that: The mass ratio of methylthiocarbamide to dimethoate is 1:1-30.

3. The insecticidal composition according to claim 1 or 2, characterized in that The mass percentage of the effective ingredients in the insecticide composition is 5-80%.

4. The insecticidal composition according to claim 3, characterized in that: The insecticide composition also contains pesticide adjuvants, and the formulation of the insecticide composition is emulsifiable concentrate, suspension concentrate, suspoemulsion, wettable powder, aqueous emulsion, microemulsion, water-dispersible granules, oil suspension or seed coating agent.

5. The insecticidal composition according to claim 4, characterized in that: The pesticide adjuvant is one or more of a solvent, a dispersant, an emulsifier and a carrier.

6. Use of the insecticide composition according to any one of claims 1 to 5 in controlling crop pests.

7. The use according to claim 6, characterized in that: The crops are one or more of fruit trees, vegetables, medicinal materials, rice, cotton and tea trees.

8. The application according to claim 7, characterized in that: The pests are pests with piercing-sucking mouthparts.

9. The use according to claim 8, characterized in that The pests include aphids, thrips, whiteflies and leafhoppers.