Grape leaf issue

Asked August 5, 2019, 4:46 PM EDT

Our grape vines are getting these growths on the bottom sides of the leaves. See pic. What is it? What can I spray to control it? We try to be organic please.

Ingham County Michigan

1 Response

Those are galls caused by grape phylloxera.
please visit this link to understand the pest and the management options

Good luck!