Current spotted wing drosophila IPM tactics and their practical implementation in berry crops in Switzerland
Drosophila suzukii is a highly polyphagous vinegar fly native to Asia, which invaded Switzerland in 2011. The pest was found in all regions of the country, from low altitudes to the timberline. The range of host plants is very broad, not only affecting crops, but also wild fruits. Current controls of SWD rely primarily on the application of insecticides, but cultural management tactics such as sanitation and the use of traps and nets provide a good alternative in some crops. Alternatives to chemical insecticides such as lime treatments are tested in experimental field and on farm trials. In berry crops, mass trapping combined with sanitation can be an efficient strategy, however, the choice of the attractant is critical, and the control may only work if the traps are at least as attractive as the fruits or used prior to start of fruit ripening. The control of SWD in fruit orchards will be particularly challenging because a high number of wild host plants in nearby wood lands, unmanaged private gardens or abandoned orchards provide an enormous refugium for SWD requiring an area wide control approach.
Dorsaz, M., Kuonen, F. and Baroffio, C.A. (2017). Current spotted wing drosophila IPM tactics and their practical implementation in berry crops in Switzerland. Acta Hortic. 1156, 827-832
insecticide, lime, mass trapping, monitoring