{"id":12604,"date":"2025-09-05T14:17:45","date_gmt":"2025-09-05T18:17:45","guid":{"rendered":"https:\/\/extension.umaine.edu\/highmoor\/?p=12604"},"modified":"2026-04-14T15:09:58","modified_gmt":"2026-04-14T19:09:58","slug":"spotted-wing-drosophila-alert-september-5-2025","status":"publish","type":"post","link":"https:\/\/extension.umaine.edu\/highmoor\/2025\/09\/05\/spotted-wing-drosophila-alert-september-5-2025\/","title":{"rendered":"Spotted Wing Drosophila Alert — September 5, 2025"},"content":{"rendered":"

David Handley, Vegetable and Small Fruit Specialist; James Dill, Pest Management Specialist; Phil Fanning, Assistant Professor of Agricultural Entomology; Christina Howard, Maine New Farmers Project Manager<\/strong><\/p>\n

Spotted wing drosophila fruit fly trap counts were little changed from last week. Sites that are no longer spraying because harvest is complete are seeing higher numbers than sites that are still harvesting and spraying to protect the remaining crop (see table below). We still expect that populations will further increase as we see some relief from present drought conditions. Growers with late ripening fruit such as fall fruiting raspberries, late ripening blueberries and day neutral strawberries should monitor their plantings closely for flies, and regularly check fruit for larvae. A 5 to 7-day spray schedule on ripening fruit may be required to keep it in good, marketable condition.<\/p>\n

If you are growing raspberries, blackberries and\/or blueberries, you should be managing spotted wing drosophila on any fruit that is presently ripening and\/or being harvested to prevent infestation.<\/p>\n

For more information on identifying spotted wing drosophila (SWD) and updates on populations around the state, visit our SWD blog<\/a>.<\/p>\n

 <\/p>\n

Other IPM Web Pages<\/strong>
\nMichigan State University Spotted Wing Drosophila<\/a>
\nPenn State University Spotted Wing Drosophila Overview<\/a>
\nUniversity of New Hampshire SWD Weekly IPM Reports<\/a><\/p>\n

David T. Handley
\nVegetable and Small Fruit Specialist<\/p>\n

Highmoor Farm<\/strong>
\nP.O. Box 179
\nMonmouth, ME 04259
\n207.933.2100<\/p>\n

UMaine Extension Diagnostic Research Lab<\/strong>
\nPest Management Unit
\n17 Godfrey Drive
\nOrono, ME 04473
\n1.800.287.0279<\/p>\n

\n\n\n\n\n\n\n\n\n\n\n
\n

Spotted Wing Drosophila (SWD) Trap Captures<\/h4>\n<\/caption>\n

Town<\/th>\nSWD weekly trap catch 8\/15\/25<\/th>\nSWD weekly trap catch 8\/22\/25<\/th>\nSWD weekly trap catch 8\/29\/25<\/th>\nSWD weekly trap catch 9\/5\/25<\/th>\n<\/tr>\n
Wells<\/td>\n135<\/td>\n323<\/td>\n468<\/td>\n341<\/td>\n<\/tr>\n
Springvale<\/td>\n67<\/td>\n201<\/td>\n1720<\/td>\n654<\/td>\n<\/tr>\n
New Gloucester<\/td>\n190<\/td>\n57<\/td>\n128<\/td>\n69<\/td>\n<\/tr>\n
Cape Elizabeth<\/td>\n474<\/td>\n388<\/td>\n695<\/td>\n798<\/td>\n<\/tr>\n
Bowdoinham<\/td>\n27<\/td>\n103<\/td>\n139<\/td>\n141<\/td>\n<\/tr>\n
Mechanic Falls<\/td>\n86<\/td>\n115<\/td>\n220<\/td>\n71<\/td>\n<\/tr>\n
Monmouth<\/td>\n40<\/td>\n24<\/td>\n30<\/td>\n13<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

 <\/p>\n

Where brand names or company names are used it is for the reader\u2019s information. No endorsement is implied nor is any discrimination intended against other products with similar ingredients. Always consult product labels for rates, application instructions and safety precautions. Users of these products assume all associated risks.<\/em><\/p>\n<\/div>\n

The University of Maine System is an equal opportunity institution committed to nondiscrimination.<\/em><\/p>\n","protected":false},"excerpt":{"rendered":"

David Handley, Vegetable and Small Fruit Specialist; James Dill, Pest Management Specialist; Phil Fanning, Assistant Professor of Agricultural Entomology; Christina Howard, Maine New Farmers Project Manager Spotted wing drosophila fruit fly trap counts were little changed from last week. 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