Knowledgebase
Fruit flies invading raspberries #682527
Asked March 03, 2021, 2:34 PM EST
Carver County Minnesota
Expert Response
Thank you for writing.
Here are two good resources.
The only thing that I would add is harvest fruit at least once or better twice a day. The softer the fruit, the happier the fruit fly. Clean up all dropped fruit. (I just leave a ziploc under my patch to drop rotten berries into. I do not use insecticides for fear of their effect on pollinators. Barrier nets supposedly work but it is too much work (for me) to open and close them.
https://extension.umn.edu/yard-and-garden-insects/spotted-wing-drosophila
https://www.canr.msu.edu/news/spotted_wing_drosophila_a_serious_pest_for_the_home_gardener#:~:text=Spotted%20wing%20Drosophila%3A%20A%20serious%20pest%20for%20the%20home%20gardener,-Duke%20Elsner%2C%20Michigan&text=This%20invasive%20fly%2C%20spotted%20wing,be%20white%20when%20picking%20raspberries