Sod Webworms

Identifying Sod Webworms in Florida Lawns

If you’ve ever cut the grass and seen clouds of small moths fluttering up, you may be dealing with sod webworms. These pests are the larval stage of several species of lawn moths, and while the adults are harmless, their caterpillar offspring can cause serious turf damage, particularly in hot, dry conditions.

Sod webworms are common throughout Florida and often go unnoticed until brown patches appear or the lawn starts thinning out. Understanding how they behave and where they thrive is the key to protecting your property.

What to Know About Sod Webworm Damage

Sod webworm damage is caused by the larvae, not the adult moths. These small greenish or brownish caterpillars feed at night, chewing off grass blades and leaving behind uneven patches that may look like drought stress at first.

You might first notice:

Sod webworms are especially active during warm months and can go through multiple generations per year, with the most severe damage usually occurring in July and August.

Where Sod Webworms Are Most Active

Sod webworms prefer hot, dry, sunny locations and are rarely found in shaded turf. South-facing slopes, embankments, and other sun-exposed lawn areas are particularly vulnerable. Residential lawns, athletic fields, commercial campuses, and golf courses are all at risk, especially if turf health is already stressed.

Rain can have mixed effects:

How to Prevent Sod Webworm Infestations

Homeowners and property managers can reduce sod webworm activity by maintaining healthy lawn conditions and acting early during peak season. Here’s how:

Mow regularly, but don’t scalp the lawn
Water deeply and infrequently to strengthen roots
Avoid over-fertilizing during peak summer heat
Look for moths flying over grass in the evening
Watch for early signs of feeding damage
Schedule lawn inspections if turf health begins to decline unexpectedly

Early intervention is key. Once mole cricket populations grow, their underground activity can cause rapid and costly turf damage.

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Protect Your Turf Before Damage Spreads

Sod webworms can quietly undo months of lawn care. Royal Pest Services helps homeowners and commercial property managers identify infestations early and apply treatments that work.