Larger Sod Webworm – Pediassia trisecta

Larger Sod Webworm– Pediassia trisecta Common Name: Larger Sod Webworm Latin Name: Pediassia trisecta Appearance: The adult moth has a wingspan of about 1 inch (2.5 cm) and is tan or buff-colored. The larvae are cream-colored with brown heads and can grow up to 3/4 inch (1.9 cm) in length.

• Egg:The eggs are small, white, and spherical, laid in groups on the grass blades.
• Pupae:The pupae are brown and found in soil.
• Larva:The larvae are cream-colored with brown heads and can grow up to 3/4 inch (1.9 cm) in length.
• Adults: The adult moth has a wingspan of about 1 inch (2.5 cm) and is tan or buff-colored.

Host plants: The larger sod webworm feeds on various turfgrass species, including Kentucky bluegrass, perennial ryegrass, and fescue. Territory: The larger sod webworm is found throughout much of North America. Damages caused by Larger Sod Webworm: The larvae of the more extensive sod webworm feed on the grass blades, causing brown patches in the lawn. They are most active at night and can cause significant damage if left unchecked. Life history and Habits: The larger sod webworm overwinters in the larval stage and resumes feeding in the spring. The larvae pupate in late spring or early summer, and the adult moths emerge soon after. The moths mate and lay eggs on the grass blades, and the cycle begins again. The larger sod webworm is most active during the summer months and can have multiple generations per year, depending on the climate.