What are these bumps on an Oak Tree?

Asked June 13, 2016, 10:30 AM EDT

I discovered these small bumps on my white oak tree. They look like they are egg sacs. Can you tell me what it could be and how to fix this?

Thanks

Michael Looney

Crawford County Michigan trees and shrubs insect issues scale insects soft scale

1 Response

Looks like Lecanium scale.
http://msue.anr.msu.edu/news/lecanium_scale_and_other_soft_scale_insects
Generally they are not a problem but I have seen a lot the last couple years.
Here is some information on control.
http://msue.anr.msu.edu/news/a_big_year_for_outbreaks_of_soft_scales_in_michigan