Drosophila suzukii degree-day modeling and field validation in the Willamette Valley

Drosophila suzukii degree-day modeling and field validation in the Willamette Valley

Samantha L. Tochen and Vaughn M. Walton

Oregon State University Department of Horticulture, Corvallis, OR

Abstract:  Drosophila suzukii was initially detected in the Willamette Valley during late summer 2009.  Field monitoring of Drosophila suzukii in blueberries, using apple cider vinegar traps, has been on going since March 2010.  Findings reflect the number of D. suzukii trapped in an organic and a conventional blueberry field in addition to growers' response to presence of D. suzukii and management thereof.   Conjunctionally, D. suzukii was reared in a controlled setting to determine developmental parameters.  From data recorded, degree-days are determined and extrapolated to field conditions in order to predict number of generations.  Field data is used to corroborate these predictions.