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Open AccessArticle

Effects of Variety and Grape Berry Condition of Vitis vinifera on Preference Behavior and Performance of Drosophila suzukii

1
Department of Chemical Ecology, Bielefeld University, Universitätsstr. 25, 33615 Bielefeld, Germany
2
State Institute of Viticulture and Enology (WBI), Merzhauser Str. 119, 79100 Freiburg im Breisgau, Germany
3
Wissenschaftliche Projektbearbeitung & Artenschutzrechtliche Begutachtung, Winzerstraße 3, 79292 Pfaffenweiler, Germany
*
Author to whom correspondence should be addressed.
Insects 2019, 10(12), 432; https://doi.org/10.3390/insects10120432
Received: 17 October 2019 / Revised: 22 November 2019 / Accepted: 27 November 2019 / Published: 30 November 2019
(This article belongs to the Special Issue Semiochemicals and Insect Behavior)
Drosophila suzukii is an invasive fruit pest and represents a potential economic threat to viticulture. After first observations of D. suzukii in Europe in 2008, research mainly focused on the evaluation of the host range and infestation risk for fruit and berry crops. However, the risk assessment of D. suzukii in viticulture has only recently started. Understanding the factors influencing preferences of D. suzukii for host species and varieties as well as offspring performance is essential to improve management strategies. We investigated the field infestation of different grape varieties across Baden-Wuerttemberg, southwestern Germany, between 2015 and 2018. Moreover, we performed dual-choice assays in the laboratory to investigate whether adults show preferences for certain varieties and whether offspring performance differs between varieties. Furthermore, we studied the impact of grape damage on choice behavior. Field monitoring revealed that D. suzukii show preferences for red varieties, whereas almost no oviposition occurred in white varieties. The results of dual-choice assays confirmed that D. suzukii preference and performance are influenced by grape variety and that flies preferred damaged over intact “Pinot Noir”, “Pinot Blanc”, and “Müller-Thurgau” berries. Overall, these findings may have important implications for winegrowers regarding cultivated varieties, grape health, and insecticide reduction. View Full-Text
Keywords: spotted wing drosophila; invasive species; host plants; insect behavior; Vitis variety; preference-performance; fruit damage spotted wing drosophila; invasive species; host plants; insect behavior; Vitis variety; preference-performance; fruit damage
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Weißinger, L.; Samuel, N.; Breuer, M.; Müller, C. Effects of Variety and Grape Berry Condition of Vitis vinifera on Preference Behavior and Performance of Drosophila suzukii. Insects 2019, 10, 432.

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