G-FORSCHT 2015

“ATTRACT-AND-KILL” STRATEGY FOR CONTROL OF DROSOPHILA SUZUKII The spotted wing drosophila, Drosophila suzukii, is an invasive vinegar fly which has substantially increased in population densities in 2014 in most southern and middle European countries. Drosophila suzukii is a highly polyphagous insect, being able to infest a variety of fruits, including cherries, raspberries, strawberries and grapes with yield losses of up to 100 % being recor- ded. The use of highly attractive lures for monitoring populations or simultaneous applications with an in- secticide (attract-and-kill) represents a future control strategy for this species. Since March 2015 a project funded by the Hessian Ministry of Science and Arts aims at identifying highly specific lures to be used to- gether with biological insecticides as an attract-and- kill strategy in viticulture and horticulture. Lures will be identified on the basis of choice assays in the lab and will be subsequently tested also regarding their effi- ciency in attracting D. suzukii in various crops under field conditions. The application of such an attract-and- kill strategy might be useful early in the season to at- tract overwintering D. suzukii adults and to prevent egg deposition and thus preventing an early increase in po- pulation densities. AUTHOR: Prof. Dr. Annette Reineke Institut Phytomedizin annette.reineke@hs-gm.de 43 Abstracts INCREASED QUALITY BY OPTICAL GRAPE SORTING? In recent years, grape sorting has gained broad impor- tance. This development can be observed particularly in case of the production of hand-picked, high-quality wines but also for further processing steps of mecha- nically harvested grapes. Grape sorting provides an opportunity to actively increase the quality of the harvested grapes by sorting out material other than grapes (= MOG). The project GrapeSort (funded by the German BMWi) involved two research institutions, Fraunhofer IOSB and Hochschule Geisenheim Universi- ty, and two industrial partners, Kellerei-Technologie Armbruster and engineering office Waidelich. The aim of this project was to determine suitable parameters correlated with grape and wine composition to be implemented as a quality criterion for improving sorting methods for the berries. AUTHOR: Dr. Maximilian Freund Institut Oenologie maximilian.freund@hs-gm.de Co-Author: Magali Blank Institut Allgemeiner und Ökologischer Weinbau

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