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《Acta Agriculturae Zhejiangensis》 1991-01
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Preliminary Study on the Resistance of Pink Bollworm to the Pyrethroid and Its Relation to Esterases

La Zhongxian~1, Yang Zhangfa~1, Ye Gongyin~2 & Wu Xiaojing~2 (1 Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, P.R.China; 2 Zhejiang Agricultural University, Hangzhou 310029, P.R.China)  
The dioassay and test with PAGE showed that the resistance of pink bollworm to the pyrethroid increased as high as 30.5 times.The resistance is closely related to the exis tence of two special esterases E_4and E_5 instead of total quantity of the esterases in the resistant population. The existence of the special esterases may be responsible for the tesistance of pink bollworm yo pyreyhroid.
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