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Frequent Specimens - Fruit Flies

Fruit Flies
Genus “Drosophila” is the genus name for what we call “fruit flies” or, sometimes pomace, vinegar, or wine flies, which speaks to their propensity–in the case of many species–for hanging around and feeding on overripe or rotting fruit.  The entire genus, however, contains more than 1,500 species and is very diverse in appearance, behavior, and breeding habitat.  The larvae of at least one species, Drosophila suzukii, which in Maine we know primarily by the name of Spotted Wing Drosophila or SWD for short, is a newly introduced species from Asia that can also feed in fresh fruit and has quickly become a major threat to soft-skinned fruits throughout most of the state.

Additional Resources & Photos:




Left: A common household fruit fly; Right: The same fly, resting and feeding on a Concord grape

Image Description: Pair of Spotted Wing Drosophila flies (male on left; female on right)

Image Description: Spotted-wing Drosophila fruit flies stuck to a UMaine Extension sticky trap

Image Description: SpottedWingDrosophila-03

Image Description: Pupa of a Spotted Wing Drosophila

Image Description: Closeup view of the saw-like ovipositor which allows Spotted Wing Drosophila to cut into healthy soft-skinned fruits

Image Description: two separate images of a Fruit Fly, on a mirror, and on a Concord grape

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University of Maine Cooperative Extension


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Contact Information

Home and Garden IPM from Cooperative Extension
491 College Avenue
Orono, ME 04469-5741
Phone: 207.581.3880 or 1.800.287.0279 (in Maine)E-mail: james.dill@maine.edu
The University of Maine
Orono, Maine 04469
207.581.1865