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THE EFFECTS OF PLANT ALLELOCHEMICALS ON THE INSECTICIDE TOLERANCE IN COTTON BOLLWORM HELICOVERPA ARMIGERA HBNER

Dong Xiangli Gao Xiwu Zheng Bingzong (Department of Entomology,China Agricultural University,Beijing 100094)  
The induction of plant allelochemicals on the cotton bollworm tolerance to insecticides was investigated using the method of mixture of plant allelochemicals and artificial diets.The insecticide tolerance of F 1,F 2 or F 3 generation population of cotton bollworms fed on the artificial diet containing rutin was stronger than that of the population fed on only artificial diet, while the susceptibility of F 4 generation population to insecticides was almost the same with that of the artificial diet fed population.The susceptibilities of the quercetin fed F 1 and F 2 and the 2 tridecanone fed F 1 generation populations to methyl parathion reduced significantly compared with the artificial diet fed population.However, there was no difference of susceptibility to methomyl and deltamethrin between the quercetin or 2 tridecanone fed population and the artificial diet fed population.
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