Honors College Thesis

 

0An assessment of the oviposition behavior of spotted-wing drosophila (Drosophila suzukii) in the presence of a novel management tool in Pinot noir grapes Public Deposited

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  • Spotted-wing drosophila (SWD, Drosophila suzukii) is an invasive fruit fly species native of Southeast Asia. In vineyards, SWD lays eggs in damaged and intact fruit of the most soft-skinned varieties, and feeds on damaged fruits during the harvest period. Feeding and oviposition activities increase the likelihood of vectoring spoilage bacteria, particularly when fruit integrity is negatively impacted due to cracking, diseases, hail injury, and bird damage. The aim of this study was to evaluate the efficacy of a novel SWD management tool, a pesticide-free behavioral disruptor (BD), in vineyard systems. Data were collected from a series of laboratory and field trials on Pinot noir grapevines. Intact and damaged single fruits or clusters were exposed to the pest either in presence or absence of the BD. The laboratory trials resulted in a reduction in oviposition in both compromised and intact grape fruits. The field trials resulted in a similar reduction in egg laying in commercial-standard conditions. These findings indicate that the BD has the potential to significantly impact SWD oviposition and feeding activities in commercial vineyard settings.
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  • The Oregon Wine Brotherhood in partnership with the Oregon Wine Research Institute provided grant funds for this study.
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