If more than 15 bugs float, take action. Cover it with a large flannel sheet. Preserve natural enemies like big-eyed bugs by limiting synthetic pesticides. Consider reseeding with resistant varieties of perennial ryegrass or tall fescue. Small brown pockmarks in late spring.
Damage often starts around pavement.
If not checked, webworms can multiply quickly until the pockmarks coalesce. If damage is visible, take action. Avoid chemical insecticides, which can kill natural enemies. Consider reseeding with varieties of ryegrass and tall fescue that resist webworms. All rights reserved.