Synergistic insecticidal composition containing tolfenpyrad and cypermethrin and application
An insecticidal composition and technology of cypermethrin, applied in the field of pesticides, can solve the problems of high cost of pesticides for farmers, easy to produce drug resistance, and inability to protect crops, so as to reduce the amount of pesticides used in the field, reduce environmental pollution and pesticide residues, and reduce labor costs for prevention and control. cost effect
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Embodiment 1
[0022] Fenpyran and cypermethrin were weighed and prepared in different proportions by conventional preparation methods to prepare tonamiprole-cypermethrin emulsifiable concentrate with a main active ingredient weight percentage of 30%. See Table 1 for specific proportions.
[0023] Adopt feed poisoning method to measure the toxicity of tonamiprole, cypermethrin and their compound samples to cotton bollworm, each treatment is repeated 3 times, each concentration handles 30 heads, and LC 50 Calculate the co-toxicity coefficient according to Sun Yunpei's method:
[0024] Table 1 Toxicity determination and co-toxicity coefficient of toxinpyrad, cypermethrin and their compound samples to cotton bollworm
[0025]
[0026] The data in the table shows that the mixture of Fenpyran and cypermethrin has a synergistic effect on cotton bollworm, and the co-toxicity coefficients of the four ratios listed in the table are all greater than 100, so the mixing of Fenpyrad and cypermethrin ...
Embodiment 2
[0028] Fenpyran and cypermethrin were weighed and prepared in different proportions by conventional preparation methods to prepare tonamiprole-cypermethrin emulsifiable concentrate with a main active ingredient weight percentage of 30%. See Table 2 for specific proportions.
[0029] The rice stem dipping method was used to determine the toxicity of tonamiprole, cypermethrin and their compound samples to Plutella xylostella, each treatment was repeated 3 times, and LC was used. 50 Calculate the co-toxicity coefficient according to Sun Yunpei's method:
[0030] Table 2 Toxicity determination and co-toxicity coefficient of pyrenpyrad, cypermethrin and their compound samples to Plutella xylostella
[0031]
[0032]
[0033] The data in the table shows that the mixture of Fenpyrad and cypermethrin has a synergistic effect on Plutella xylostella, and the co-toxicity coefficients of the four ratios listed in the table are all greater than 100, so the mixture of Fenpyran and cy...
Embodiment 3
[0035] Weigh 5g of pyrenpyrid, 20g of cypermethrin, 4g of calcium dodecylbenzenesulfonate, 3g of phenethylphenol polyoxyethylene ether, add xylene to 100g, put the above raw materials into the mixing tank according to the conventional method of preparing cream , form the main active ingredient weight percentage content of 25% tofufenpyramide-cypermethrin emulsifiable concentrate.
[0036] The sample that adopts embodiment 3 to carry out the field test of field prevention and control cotton bollworm in field, contrast agent is 15% tolfenpyrad EC (emulsifiable concentrate) and 10% cypermethrin EC, and concrete consumption is shown in Table 3, and water consumption per mu is 30kg, after medicine Check the results of 3 days, 7 days, 14 days, and 28 days. Use clear water as a blank control, and the test results are shown in Table 3:
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