Larvicidal efficacy of neonicotinoid classes of compounds on Culex quinquefasciatus.

摘要

Mosquito larvicidal efficacy of seven different synthesized imidacloprid compounds (IMD) with different substitutions (chlorine ion, methyl group, methoxy group, ester group, phenyl ring and pyridine ring) of Imidacloprid were studied on the IV stage larvae of mosquito, Culex quinquefasciatus. LC₅₀ of each compound (IMD1-IMD-7) was determined using probit analysis. Effects of these compounds on biochemical toxicity were also determined by observing the changes in total protein, lipid and Acetylcholine esterase activity of the mosquito larvae. The results show that due to the action of these compounds, higher amount of protein production (p<=0.001) and AchE activity (p<=0.001) and significant decrease in total lipid activity (p<=0.001) were observed when compared to the control. Similar types of results were also reported on increase production of protein, lipid and acetylcholine activity due to the action of insecticides in other insects. Hence, it is concluded that, these seven synthesized compounds can be used as mosquito larvicides.