Strange growth on grapevine leaves

Asked July 24, 2015, 1:03 PM EDT

Hi,

We found this strange light green/yellow cone like growth on our friends grapevine leaves. We have asked around and have not found anyone who has seen it before or been able to identify it. The vines are doing fine otherwise and are producing grapes.

Yellow Medicine County Minnesota galls

1 Response

Sorry for the delay
Grape Tube Gallmaker
Check www.oardc.ohio-state.edu they are harmless and will drop with the leaves this fall.