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Student Competition II

Student Competition II

Evaluating Larvicide Resistance and Cross Resistance in the Culex pipiens Assemblage

Wednesday, March 5, 2025
11:45 AM – 11:55 AM AST
Location: 201
Larvicides are a common tool used to control mosquitoes and protect public health. We investigated larvicide cross-resistances using laboratory strains resistant to S-methoprene and L. sphaericus. We conducted bioassays and probit analyses to calculate resistance ratios and LC values for S-methoprene, L. sphaericus, and pyriproxyfen. Our results revealed reciprocal cross-resistance between S-methoprene and L. sphaericus, with differing susceptibilities to pyriproxyfen. These results raise important considerations for mosquito control, particularly in terms of product rotation strategies.