Acetylcholinesterase (AChE, EC 3.1.1.7) catalyzes the hydrolysis of the neurotransmitter acetylcholine (ATCh) at cholinergic synapses to keep the normal transmission of nerve impulses. It is the target of the organophosphate and carbamate compounds. The intensive use of insecticide has led to the pollution of environment and many insects have developed resistance. As a kind of important economic insect, silkworm is susceptible to pesticides. Usually, it is used as a representative of non-target organisms in...