Sod webworms in turf typically produce which sign?

• A. Spin silk webbing near the soil
• B. Frass on foliage
• C. Galls on stems
• D. White powder on leaves

Answer: (A)

Sod webworms give themselves away most clearly by spinning thin silk webbing right at the base of the grass, near the soil surface, where the larvae are feeding. That silken thread creates small webbed patches in the turf and acts as a protective shelter for the caterpillars as they chew on the leaf tissue. You may also notice frass (insect droppings) where feeding occurs, but the silk webbing near the soil is the distinctive sign that points to these pests. Other options—frass on foliage, galls on stems, or a white powder on leaves—are not as characteristic of sod webworms and can be caused by different problems.