Sod Web Worms

What Are Sod Web Worms?

Sod web worms are the larval or caterpillar stage of a small, tan moth often seen flying over the turf in early evening from May through mid-summer. Sod web worms feed on the grass blades just above the soil line. The feeding defoliates the lawn where the sod web worms chew off the grass.

Sod web worms feed at night and hide in the thatch during the day. Presence of the larvae may not be noticed until significant damage has occurred. Large numbers of tan moths on your lawn in the early evening may be evidence of sod web worm infestation.

Controlling Sod Web Worms

• Thatch maintenance at less than 3/4 inch thickness is helpful in decreasing the chance of sod web worm activity.
• Watering the lawn to prevent drought stress also is helpful.
• If you notice large numbers of moths on your lawn, or small spots where grass blades have been chewed away, contact your lawn care specialist. Your specialist can identify any insect problems and advise you as to the correct action.