Fungus among us?

Asked July 10, 2018, 8:28 AM EDT

This is from a grapevine, very low to the ground, in my Eastside Lansing back yard. I have never seen this before, can't tell if it's a fungus, a kind of scale, or insect chrysalis. Any info will be helpful. Thank you again for providing this valuable resource to your community!

Ingham County Michigan

1 Response

Those are insect galls. An insect laid eggs in the leaf and the developing larvae are causing the plant to develop the gall around them as protection.
This is not one of the gall forming insects in grapes which causes damage mainly cosmetic. You could remove leaves and cut open to see the small larvae insect but it is not worth spraying for