In order to identify current knowledge gaps and potentially efficient strategies to control â€œSpotted Wing Drosophilaâ€œ (SWD), Drosophila suzukii, in both Asia (area of origin) and Germany (area of invasion), the Julius KÃ¼hn-Institut, Federal Research Centre for Cultivated Plants, organized a Symposium at its sites Darmstadt, Institute for Biological Control, and Dossenheim (near Heidelberg), Institute for Plant Protection in Fruit Crops and Viticulture, from June 26 to July 1, 2017. A board of highly qualified experts from universities as well as research institutions from China, Germany, Italy as well as Switzerland participated. They presented and discussed their latest results in research in the field of biology and ecology, overwintering, migration, climate adaptation as well as potential non-chemical strategies and novel approaches to control this serious pest. On behalf of the German-Chinese Agricultural Center (DCZ), Dr. Marco Roelcke attended.
Drosophila suzukii is difficult to control due to its short generation time resulting in several overlapping generations with all developmental stages present simultaneously, high population densities, and due to broad distribution based on its polyphagy and its migration between orchards and natural habitats. Eco-evolutionary approaches prove the exceptional position of Drosophila suzukii. Natural enemies are explored intensively by scientists in Asia as well as in Europe. Innovative research looks for possibilities of resistance breeding or the manipulation of field population by the release of sterilized flies. Current Integrated Pest Management (IPM) systems used in China and Germany were presented.
During the following excursion in the Federal German State of Baden-WÃ¼rttemberg the participants visited the Center for Agricultural Technology Augustenberg (LTZ) near Karlsruhe, the OGM Fruit Wholesale Market Mittelbaden eG at Oberkirch and several private growers producing soft and stone fruits in the county of Ortenau. The field visits of orchards demonstrated current practical experience in pest management in Germany and were organized by the local plant protection services.
The Chinese-German Symposium has been the second bilateral meeting concerning SWD. It has been gratefully sponsored by the Sino-German Center for Research Promotion in Beijing. The first workshop which took place in Beijing and Yunnan in June 2015 had been organized by the DCZ.
The Symposium was successful in building a scientific consortium from both countries covering a multi-discipline approach. The experts summarized that great progress in gain of knowledge about this invasive pest organism has been made since the first meeting in 2015. The partners initiated further plans for collaboration. The knowledge and ideas gained from the Symposium will be helpful to conduct successful basic and applied research on integrated management of SWD. Thus, follow-up effects are expected for the development of integrated management of SWD in China and Germany as well as in other regions of the world.