Galls of various shapes occur on grape as a result of attack by small gall midges.
Galls occur on leaves, tendrils, and blossom buds and can occasionally cause considerable injury.
Numerous species of gall midges attack grape. The most prominent are the grapevine tomato gall, grape apple gall, and grape tube gall. No practical control for these galls is known. Removing the galls by hand and destroying them would inhibit future populations.