Peritrophic Membrane as Vehicle for DDT and DDE Excretion in Aedes aegypti Larvae

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Abstract
Larvae of the Trinidad DDT-resistant strain when placed in DDT suspensions excreted long streamers of peritrophic membrane containing quantities of unabsorbed DDT. A resistant strain from Puerto Rico showed this property, but resistant strains from Malaya did not. Normal strains when placed in DDT excreted little of the membrane.