Spotted Wing Drosophila Alert and Berry Notes — October 6, 2023
David Handley, Vegetable and Small Fruit Specialist; James Dill, Pest Management Specialist, Phil Fanning, Assistant Professor of Agricultural Entomology, Christina Howard, Maine New Farmer Project Manager
This will be the final issue of the Spotted Wing Drosophila Alert for the 2023 season.
Spotted wing drosophila counts declined substantially in all of our trapping locations this week. There has not yet been a frost, so we were not expecting to see lower populations this early. Most farms have ended harvest, but there are still some late raspberries and blueberries available to attract the flies. Fly populations are still high enough to threaten these fruit, so growers should continue to provide regular sprays until the crop is finished for the season.
A 5-7 day spray schedule is recommended to minimize fruit infestation in fields.
For more information on identifying spotted wing drosophila (SWD) and updates on populations around the state, visit our SWD blog.
David T. Handley
Vegetable and Small Fruit Specialist
P.O. Box 179
Monmouth, ME 04259
UMaine Extension Diagnostic Research Lab
Pest Management Unit
17 Godfrey Drive
Orono, ME 04473
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