Abstract

Laboratory-reared diapause pink bollworm larvae exposed to photoperiods of 14 or 16 hours daily terminated diapause more rapidly than larvae held under an 8- or 12-hour daily photoperiod at 20° C. Under each of the photoperiodic regimes studied at 20° and 27° C, those larvae which were maintained in 100% RH terminated diapause and pupated more rapidly than larvae held under 65% RH. Diapause was terminated more rapidly in those larvae subjected to a contact moisture treatment than in those held“dry”under lower humidity (60% ± 10% RH).

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