Acta Entomologica Sinica (2003) 46, 250-253

Ze-Wen Liu and Zhao-Jun Han (2003)
The roles of carboxylesterase and AChE insensitivity in malathion resistance development in brown planthopper
Acta Entomologica Sinica 46 (2), 250-253
Abstract: Malathion resistance of brown planthopper (Nilaparvata lugens Stål) was selected in laboratory and the successive changes in carboxylesterase (CarE) and AChE were also analyzed. The results showed that the speed of resistance selection varied with generations. The biggest change of LD50 occurred between the 3rd - 5th generations. The rise of carboxylesterase activity was correlated with the change in malathion resistance for the first 5 generations, while change in AChE sensitivity between 6th - 8th generations had a higher correlation with the resistance development. Therefore, it was concluded that carboxylesterase activity increase play important role in the early stage of the resistance development and the AChE insensitivity at the late stage.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Database assignments for author(s): Zhaojun Han

Research topic(s) for pests/diseases/weeds:
pesticide resistance of pest

---

Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Nilaparvata lugens	Rice (Oryza)