1999•Journal of Zhejiang University(Sciences Edition)Requires access
Resistance and Selection Response in Anopheles Sinensis to Deltamethrin.
Jin Wang
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Abstract
Resistance levels to deltamethrin in five natural populations of Anopheles sinensis Wiedemann
were measured. The medial lethal concentrations (LC 50 s) of deltamethrin in these
populations were higher than their susceptible strains, especially in Wenzhou population that
had a resistance ratio(RR 50 ) of 11 relative to its susceptible strain. Resistant strains were
selected with deltamethrin for 12 generations. Resistance levels in resistant strains were
130～190 folds as their susceptible strains, and 10～40 folds as their natural populations.
Response of selection(R) in the resistant strain from Wenzhou population was less than 0.1,
and those in resistant strain from other natural populations were more than 0.1.It indicates that
a resistant strain form a natural population with high resistance has lower increase ratio of
resistance than a resistant strain from a natural population with low resistance under identical
insecticide selection. These results are discussed in relation with mosquito control strategies.