Internal DDE Production by Normal and DDT-Resistant Larvae of Aedes aegypti

Abstract

Larvae of 3 DDT-susceptible strains of Aedes aegypti (L.) when exposed to 1 p.p.m. DDT for 24 hours, contained approximately one-tenth to one-quarter as much DDE as larvae of three DDT-resistant strains. However, in the naturally-tolerant Penang strain in which the DDT-susceptibility levels had been varied by selection or relaxation of pressure, there was little correlation between DDT-resistance and DDE content.