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  • Title: Susceptibility of cranberries to Drosophila suzukii (Diptera: Drosophilidae).
    Author: Steffan SA, Lee JC, Singleton ME, Vilaire A, Walsh DB, Lavine LS, Patten K.
    Journal: J Econ Entomol; 2013 Dec; 106(6):2424-7. PubMed ID: 24498743.
    Abstract:
    Drosophila suzukii Matsumura (Diptera: Drosophilidae), commonly referred to as the spotted wing drosophila, is an exotic species that has proven a troublesome pest of fruit production in the United States. The fly targets small fruit and thus represents a concern for the U.S. cranberry industry. Two studies were conducted to assess whether cranberries may serve as hosts for D. suzukii. In the first study, the suitability of ripe, unripe, and over-ripe cranberries were assayed by examining adult oviposition and larval development in no-choice trials. In the second study, wounded and unwounded fruit were examined as potential hosts in choice and no-choice trials. Our first study showed that ripe, unripe, and over-ripe cranberries were unsuitable hosts (few eggs were laid, with no surviving puparia). In the wounded and unwounded berry study, no larvae survived to adulthood among unwounded berries. Within wounded fruit, D. suzukii readily fed and developed into adults. Together, these results suggest that unwounded cranberries--whether ripe, unripe, or over-ripe--are unsuitable as hosts for D. suzukii. Wounded rotting cranberries, however, can serve as hosts. Across the landscape, cranberry marshes with rotting fruit may contribute to D. suzukii source-sink dynamics.
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