Native to southeast Asia, the spotted-wing drosophila (Drosophila suzukii (Matsumura); Diptera: Drosophilidae) has become a major pest of small fruits in the Americas and Europe. Field studies were conducted over a two-year period (2015–2016) in cultivated highbush blueberry (Vaccinium corymbosum Linnaeus; Ericaceae) fields and adjacent non-crop habitats containing wild blueberries in New Jersey (United States of America). We tracked seasonal changes in D. suzukii adult abundance and fruit infestation throughout the ripening period (June–August). In both years, D. suzukii adult counts post-harvest were generally higher in traps located in non-crop habitats compared with those located in highbush blueberry fields. Wild and cultivated fruits synchronised in maturation, and the numbers of eggs laid and of emerged adults in both fruit types were comparable for most of the season, although sometimes these numbers were higher in wild fruits post-harvest. Overall, immature success (measured as the per cent egg-to-adult survival) was also mostly higher in wild than in cultivated fruits. Altogether, these studies document that non-crop habitats, and wild hosts therein, are used by D. suzukii during fruit ripening and may serve as potential sources of infestation to nearby highbush blueberry fields. Hence, methods that reduce D. suzukii populations in non-crop habitats may help manage this pest in neighbouring highbush blueberries.

斑翅果蝇（Drosophila suzukii（Matsumura）；双翅目：Drosophilidae）原产于东南亚，已成为美洲和欧洲主要的小果实害虫。在新泽西州（美利坚合众国）的高灌木蓝莓（Vaccinium corymbosum Linnaeus； Ericaceae）田地和相邻的非农作物栖息地中，在两年（2015-2016年）期间进行了田野研究。我们跟踪了整个成熟期（6月至8月）的铃木D.成虫数量和果实侵染的季节变化。两年来，铃木D.与高丛蓝莓田相比，非作物生境中的捕集阱中的成虫数通常更高。野生和栽培水果在成熟过程中同步进行，两种水果类型的下蛋数和成年产卵数在整个季节中都是可比的，尽管有时这些数量在收获后的野果中更高。总体而言，野生的未成熟成功率（以成卵至成活的百分比来衡量）也大多比栽培水果高。总而言之，这些研究记录了铃兰D. suzukii在果实成熟期间使用了非作物生境和其中的野生寄主，并且可能成为附近高灌木蓝莓田的潜在侵染来源。因此，减少铃木D.的方法 非作物生境中的种群可能有助于控制邻近的高灌木蓝莓中的这种害虫。