this post was submitted on 03 Jul 2023
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What's this Plant?

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This is on one of my mother's maples. What is it and what should she do about it?

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[–] [email protected] 2 points 1 year ago (2 children)

Thank you. Can anything be done about it?

[–] [email protected] 5 points 1 year ago

Insects that form galls like this are typically only causing cosmetic damage and don't threaten the health of the tree. I wouldn't worry about them unless they were really out of control or you started seeing leaves dying

[–] [email protected] 0 points 1 year ago* (last edited 1 year ago) (1 children)
[–] [email protected] 1 points 1 year ago (1 children)
[–] [email protected] 8 points 1 year ago (1 children)

Hi, arborist here. I would advise against using pesticides to control this issue. The galls are completely harmless to the tree and the pesticides may cause harm both to you if you were accidentally exposed, and definitely to other invertebrates, many of which may be beneficial. Some may even help control the mites in future years.

[–] [email protected] 5 points 1 year ago (1 children)

Thanks. I think what my mother will do is just pick off the affected leaves that are really bad and leave the rest.

[–] [email protected] 5 points 1 year ago

Great, that’s basically what I’d recommend. Disposing of any leaves you pull off the tree and those on the ground away from the tree should help reduce the intensity of the issue.