Plant spots or what?

Asked September 5, 2019, 11:36 AM EDT

What is this . Please and thank you . This is all over my grapes/ scuppernongs

Montgomery County Maryland

1 Response

Hi- the galls on the leaf underside were made by grape phylloxera, small aphid-like insects that feed on roots and leaves. It is considered a minor problem and no sprays are necessary. Remove and crush/discard badly infested leaves to reduce the population. See our page on grape pest problems, including phylloxera,