Fenpropathrin and chlorpyrifos-containing composite insecticidal and acaricidal nano aqueous solution as well as preparation method and application thereof
A technology containing fenpropathrin and fenpropathrin, which is 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, improve the control effect, and delay the resistance. sexual effect
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Embodiment 1
[0026] (1) Indoor toxicity test
[0027] 1. The virulence test of fenpropathrin, chlorpyrifos and fenpropathrin·chlorpyrifos compound nano-aqueous on citrus red spider was carried out by dipping glass slide method, each treatment was repeated 3 times, each concentration treated 30 heads, with LC 50 The value is calculated based on Sun Yunpei’s method of co-toxicity coefficient (CTC value):
[0028] Single-dose toxicity index = standard drug LC50 / a single-dose LC50×100
[0029] Theoretical Toxicity Index (TTI) = A single dose toxicity index × A single dose proportion in the mixture + B single dose toxicity index × B single dose proportion in the mixture
[0030] Measured Toxicity Index (ATI) = LC50 value of standard single agent / LC50 value of mixed agent×100
[0031] Co-toxicity coefficient (CTC) = measured toxicity index of the mixture (ATI) / theoretical toxicity index of the mixture (TTI) × 100
[0032] Co-toxicity coefficient classification: when CTC is greater than 120, the mixture has...
Embodiment 2
[0048] Formula: 10g fenpropathrin, 1g chlorpyrifos, 3g alkylphenol polyoxyethylene ether phosphate, 3g fatty alcohol polyoxyethylene ether, 2g alcohol ether succinic acid monoester sodium sulfonate, add water to 100g.
[0049] The preparation method is the same as in Example 1, and 11% fenpropathrin·chlorpyrifos compound nano-aqueous agent is prepared.
[0050] The nano-aqueous agent of this example has a transparent and slightly yellow appearance, a viscosity of 165.5 mPa·s, and an average particle size of 14.8 nm.
[0051] After cold storage at 0°C for 7 days and hot storage at 54°C for 14 days, the preparations did not precipitate and remained stable.
[0052] After entering water, the nano-aqueous agent of this embodiment can quickly dissolve with water to form a completely transparent solution, and the dilution stability is qualified.
Embodiment 3
[0054] Formula: 5g fenpropathrin, 1g chlorpyrifos, 5g sodium fatty acid methyl sulfonate, 3g styrylphenol polyoxyethylene ether, add water to 100g.
[0055] The preparation method is the same as in Example 1, and a 6% fenpropathrin·chlorpyrifos composite nano-aqueous agent is prepared.
[0056] The nano-aqueous agent of this example has a transparent and slightly yellow appearance, a viscosity of 200.5 mPa·s, and an average particle size of 17.6 nm.
[0057] After cold storage at 0°C for 7 days and hot storage at 54°C for 14 days, the preparations did not precipitate and remained stable.
[0058] After entering water, the nano-aqueous agent of this embodiment can quickly dissolve with water to form a completely transparent solution, and the dilution stability is qualified.
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