Analysis of Diapause Induction and Termination in Pectinophora gossypiella in Brazil

Abstract
A model for pink bollworm (PBW) diapause in response to decreasing photoperiod and fluctuating temperatures developed in California using a wild Arizona biotype is used to explain diapause induction, termination, and adult flight phenology of PBW under Brazilian conditions. The model suggests that the Arizona and Brazil biotypes do not differ in their diapause response, which is considerably broader than required to survive the conditions in the areas examined.