Birch Tree leaf gall

Asked August 1, 2017, 11:13 AM EDT

How do I treat this problem? What and when should I spray my birch trees? Thanks.

Dakota County Minnesota

1 Response

Here is an excellent University of Minnesota publication on galls:
https://www.extension.umn.edu/garden/insects/find/insect-and-mite-galls/

Most galls do not adversely affect plant health. Therefore, management is generally not suggested to protect plant vitality. Chemical applications are an option, but are often ineffective since the precise timing of sprays is critical.