First record of Drosophila suzukii in Quebec vineyards

Abstract

Aim: Surveys conducted between July and September 2012 in Quebec vineyards revealed the presence of the spotted wing drosophila (SWD), Drosophila suzukii Matsumura, just before harvest.

Methods and results: Red and white grapevine cultivars from four vineyards were surveyed for leafhoppers by using a tapping method. Unexpectedly, a total of 30 SWD adults were collected from red grapevine cultivars, i. e., Marechal Foch, Gamay and Seyval Noir. Furthermore, a total of 101 SWD emerged from bunches selected in these vineyards and placed under laboratory conditions. No SWD were found in white cultivars.

Conclusion: This is the first mention of SWD in grapevines grown for wine in Quebec.

Significance and impact of the study: Spreading of SDW across Quebec vineyards may lead to important yield losses. Insecticide treatments need to be adapted to address this new entomological challenge.