The objective of this study was to determine an optimal trap design and bait for spotted wing drosophila, Drosophila suzukii (Matsumura), in the wild blueberry agro-ecosystem. Two preliminary experiments were conducted in 2013 and 2014 to address this objective. In 2018, an experiment was conducted to evaluate the effect of the physical trap size, as perceived by the spotted wing drosophila, on trap capture efficacy. We found that the red Solo® cup trap was an optimal trap for monitoring spotted wing drosophila in wild blueberry and that inserting a yellow sticky card inside the trap or painting a black contrast ring around the top entrance holes resulted in no benefit. We also found in early experiments that the live yeast bait with sugar syrup either alone or with apple cider vinegar was a superior bait. Trap size affected trap capture abundance; when considering catches based on adjustments for bait volume or two-dimensional trap area, the small trap size was more efficient than the standard
