Abstract
Weight changes were determined in unabraded and lightly abraded fourth-instar nondiapause and diapause pink bollworm, Pectinophora gossypiella (Saunders), larvae subjected to aqueous submersion and desiccation. In general, abrasion brought about greater changes in water content and was accompanied by greater larval mortality, particularly among submersed larvae, with no differences observed between sexes. About twice as long was taken for the weight change in diapause larvae to equal the change in nondiapause larvae. The average percent weight change of abraded larvae was as much as 6 times greater than that of live unabraded larvae and as much as 10 times greater in larvae killed by the treatment.
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