In this paper, we studied the organophosphorus resistance mechanism in cotton bollworm Helicoverpa armigera (Hubner), one of the serious cotton pests in the world. Our study especially put stress on the biochemical and molecular analysis of acetylcholinesterase (AChE, EC 3.1.1.7), which is the inhibition target enzyme of organophosphate and carbamate insecticides.
Monocrotophos resistance was selected in laboratory with the field resistant cotton bollworm collected from Liaocheng County (LC-R), Sh...