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First record of Drosophila suzukii in Quebec vineyards.

Saguez, J., Lasnier, J., and Vincent, C. (2013). "First record of Drosophila suzukii in Quebec vineyards.", Journal International des Sciences de la Vigne et du Vin, 47(1), pp. 69-72.


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.

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