On the occurrence of Drosophila suzukii (Matsumura, 1931) in the vineyard ecosystem from Douro Demarcated Region

Abstract: Drosophila suzukii was detected for the first time in Portugal in 2012. This insect causes significant losses mainly in small fruits such as blueberries, raspberries and cherries, but also in other crops, including grapevine, and wild and ornamental plants. Although D. suzukii occurrence in Douro Demarcated Region (DDR) has already been reported, to the best of our knowledge there is no information about its importance as grapevine pest. Thus, this study aimed: (i) to evaluate the occurrence of drosophilids in DDR vineyards and in particular that of D. suzukii; and (ii) to characterize D. suzukii population spatio-temporal dynamics in the DDR vineyard ecosystem (including vineyard plots and neighbouring non-crop habitats).