I need help with an infestation on my 30 year old Wye Oak seedling. Some...

Asked July 19, 2013, 9:34 AM EDT

I need help with an infestation on my 30 year old Wye Oak seedling. Some quater inch galls on twigs. Small galls on leaves. Leaves curl up and die. See picture

Anne Arundel County Maryland trees and shrubs insects leaf galls

1 Response

As you may be aware, oak trees are very attractive to gall-promoting wasps and midges. There is no treatment necessary. The galls are actually produced by the tree as a defense mechanism to isolate the egg and hatchling from interfering with the vascular system of the tree. Even when the tree suffers leaf drop, it usually occurs late enough in the season to allow the tree to have stored enough energy for next year's re-foliation.
LS