The most common and damaging of this species in Ohio are the bluegrass sod webworms. In the late fall and early spring, when turf is actively growing, sod webworm larva leaves their underground tunnels to feed on your grass. You’ll know sod webworms are present from the small brown patches that appear on your lawn, eventually running together by mid-summer to create large irregular patches of thin, brown grass.
Learn about sod webworms and what damage they can do to your lawn.