The Spotted Wing Drosophila (SWD), a pest of Asian origin that is already established in many of the main fruit-producing regions of the United States, has been found in Michigan, according to Michigan State University.
SWD is a pest of berry crops, grapes and tree fruit, with a preference for softer-fleshed fruit. A monitoring program for SWD found no flies this past summer, but in late September the first flies, both male and female, were found in traps deployed in southwest Michigan. This was well after harvest of most fruit crops, and no pests were found in any fruit, according to MSU.
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