Spotted Wing Drosophila
Spotted Wing Drosophila Drosophila suzukii
In every project year, the nets have proven to be highly efficient in excluding D. suzukii: none or only very few adult Spotted Wing Drosophila (SWD) were found in bait traps. Likewise, no or only low numbers of infested fruits were found within the netted orchards. This was evident especially in late fruit cultures, when fly population pressure was increasing. For netted cherry orchards, limited conclusions could be drawn for the years 2017 and 2018, as SWD population growth was slow and delayed due to cold winter conditions, frost periods in early spring, followed by repeated periods with temperatures >30 °C and continuous dryness in summer. Nevertheless, clear reduction in damage levels in comparison to cherry cultures without net protection were obvious.
Insecticides saving
In comparison to conventional fruit production, the number of insecticide treatments against SWD was markedly reduced under net covers. Treatments declined over the years in several cases even to zero as farmers relied more and more on the regular monitoring performed by the project collaborators in charge.
For more details refer to:
Augel, C.; Boehnke, B.; Wichura, A.; Lindstaedt, J.; Wiebusch, J.-H.; Engel, A.; Benz, S.; Saltzmann, J.; Eberhardt, G.; Vogt, H.; Köppler, K. (2020): Demonstration project "Exclusion netting for managing Spotted Wing Drosophila in fruit crops" – Results 2017 – 2019. In: Foerdergemeinschaft Oekologischer Obstbau e.V. (FOEKO) (Hrsg.): Proceedings of the 19th International Conference on Organic Fruit-Growing: from February 17th to February 19th, 2020 at the University of Hohenheim/Germany, 166-169.
https://www.ecofruit.net/wp-content/uploads/2020/04/31_Augel_166-169.pdf
Boehnke, B.; Köppler, K.; Augel, C.; Wichura, A.; Lindstaedt, J.; Wiebusch, J.-H.; Engel, A.; Benz, S.; Vogt, H. (2018). Demonstration project "Exclusion netting for managing Spotted Wing Drosophila in fruit crops" – Results 2017. In: Foerdergemeinschaft Oekologischer Obstbau e.V. - FOEKO [Hrsg.]: EcoFruit: 18th International Conference on Organic Fruit-Growing; Proceedings to the Conference, 19.02. - 21.02.2018 at Hohenheim/Germany, 268-271.
https://www.ecofruit.net/2018/54_Boehnke_268-271.pdf
Boehnke, B.; Köppler, K.; Augel, C.; Wichura, A.; Lindstaedt, J.; Wiebusch, J.-H.; Engel, A.; Benz, S.; Vogt, H. (2019): Demonstration project "Exclusion netting for managing Spotted Wing Drosophila in fruit crops" – Results 2017. In: Linder, C.; Fountain, M.; Prodorutti, D. (Hrsg.): Working Group "Integrated Protection of Fruit Crops", Subgroup "Soft Fruits": Proceedings of the 9th Workshop on Integrated Soft Fruit Production at à Riga (Latvia), 5-7 September 2018 (IOBC WPRS Bulletin 144), Darmstadt, 78-84
and
Annual Reports (in German)
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