Can you identify the abnormal growths on these leaves?

Asked May 21, 2015, 8:59 PM EDT

Can you advise on the attached leaves with abnormal growths? I assume they are insect eggs. Harmless?



Howard County Maryland trees and shrubs galls lrk

1 Response

You are not seeing actual eggs, but galls. Galls are leaf swellings in reaction to various insect or other organism activity. Here is a good explanation from our website: http://extension.umd.edu/hgic/shade-tree-galls

You're right--the vast majority are harmless.

ECN