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Posted 27 September 2013. PMN Crop News.

First Report of Spotted-Wing Drosophila

Source: South Dakota State University Press Release.

Brookings, South Dakota (September 9, 2013)--The first specimen of spotted-wing drosophila (Drosophila suzukii) was identified in South Dakota on August 28 2013. The specimen was collected in a vinegar trap set in Yankton County. Trapping and preliminary identification was conducted by Buyung Hadi, SDSU Extension Eurban Entomology Specialist. The identification was confirmed by Paul Johnson, Professor of entomology and director of Severin-McDaniel insect collection at SDSU.


Spotted-wing drosophila was first detected in California in 2008. Subsequently populations of spotted-wing drosophila have been detected in multiple states in all parts of the country including the Midwest.

"Unlike other vinegar flies that are considered nuisance due to their habit of laying eggs inside cracked or damaged fruits, female spotted-wing drosophila has serrated ovipositor capable of laying eggs inside healthy ripe fruits," Hadi said. "Consequently, developing larvae (small white maggots) can often be found within the harvestable fruits."

Hadi said this is especially true for raspberry, blueberry and blackberry. Due to this, spotted-wing drosophila is considered a potentially damaging pest for small fruit production.

SDSU Extension is currently organizing a volunteer-based trapping effort in collaboration with fruit growers across the state to assess the spatial distribution of the potentially damaging insect pest.

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