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 grapes

1 Response

Hi,
Those are galls caused by grape phylloxera.
please visit this link to understand the pest and the management options http://ipm.ucanr.edu/PMG/r302300811.html

Good luck!