Rhus Trilobata (Skunkbush Sumac) Galls

Asked August 12, 2017, 10:19 PM EDT

The sumac in my yard is infested with galls (see photos). Any idea what pest is causing this?

I have a lot of fruit trees and a viburnum nearby. Are any of those likely to also be susceptible to this pest?

I wouldn't miss the sumac, but there is a lot of it to remove.


Boulder County Colorado trees and shrubs

2 Responses

Ihttp://extension.colostate.edu/topic-areas/insects/insect-and-mite-galls-5-577/ Eriophyid mite. I am sending you a fact sheet on them. I hope it is helpful. Best of luck.

Thanks! Would you recommend removing the affected foliage to reduce spread of the mite to other plants and trees?