Abstract:

Chitosan has many excellent properties such as film-forming, non-toxic, antibacterial, choosing chitosan as the main film-forming material, supplemented nano-TiO2 modified by Sodium Laurate, prepared a new type of safe, non-toxic film called CTS-TiO2 composite film, then mixed with Pesticide (P) prepared a composite film called CTS-TiO2-P, the crops were sprayed by the prepared solution P(contrast), CTS-P and CTS-TiO2-P separately, the dynamic test results of CTS-TiO2-P, CTS-P, P on plant were detected and compared by GC-FPD. The results showed that when the ratio of P, chitosan and TiO2 was 0.04%,2 %,0.03% separately, the long-term effects of pesticide compound membrane were significantly longer than that of the pure pesticide, composite membrane pesticide formulations added nano-TiO2 were superior to CTS-P composite membrane, the efficacy of composite membrane pesticide formulations extended from 45 d to 90 d and above. Meanwhile, at the condition of reaching the same effect of killing inserts, pesticide usage can be saved 1/2, it has better effect to reduce the waste of pesticide resources, production costs and to prevent and control environmental pollution.