Oak Slug Sawfly

The characteristic damage produced by Oak Slug Sawflies is evident on their namesake hosts in southwest Ohio. Some of the damage occurred earlier in the season, while other damage is occurring right now.

Glistening, slug-like sawfly larvae along with their characteristic skeletonizing damage are appearing on oaks belonging to the white oak group in southwest Ohio. The upper leaf surface appears bleached with leave veins remaining apparent. Flipping the leaves over reveals the slug-like culprits stuck to the underside of the leaves.

Skeletonizing damage produced by an oak slug sawfly on oaks belonging to the white oak group is becoming in southwest Ohio. The upper leaf surface appears bleached with leave veins remaining apparent. Flipping the leaves over reveals the slug-like culprits stuck to the underside of the leaves.