Flies on Hydrangea Trees and shrubs - Ask Extension
My hydrangeas have been infested with flies - to the point i cannot walk on our sidewalk - is there anything i can do to get rid of them? The image be...
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Flies on Hydrangea Trees and shrubs #877681
Asked July 17, 2024, 4:50 PM EDT
My hydrangeas have been infested with flies - to the point i cannot walk on our sidewalk - is there anything i can do to get rid of them? The image below is one of the trees
Hennepin County Minnesota
Expert Response
You are probably seeing hover flies. They are important pollinators of many flowers and plants but are a nuisance to us. I have had them swarm on one or more hydrangeas in the past or, like this year, have not seen any. They will soon be gone. There is no need to treat as they are also important in controlling other insects like aphids. https://www.fs.usda.gov/wildflowers/pollinators/pollinator-of-the-month/flower_flies.shtml
