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Abstract
Drosophila suzukii is a prolific pest of small and stone fruits. Current population monitoring and modeling efforts are not reliable enough to predict fruit infestation. Therefore, insecticides are most commonly applied prophylactically on a calendar rotation. We conducted laboratory and field trials to develop our understanding of D. suzukii thermal biology, natural habitats, and responses to management strategies. These are key areas of inquiry to refine population modeling and interpret monitoring data. We found that thermal stress during development decreases fertility in adulthood, but this can be mitigated if maternal parents were previously exposed to heat stress. We also found that evergreen foliage increased D. suzukii abundance during the winter, and conditions below leaf litter were favorable for overwintering flies. Finally, we evaluated management practice and population monitoring tools. These findings further our understanding of this pests biology and will contribute to our ability to manage this key insect pest.