Sod Webworms
Another dastardly caterpillar that feeds on Georgia lawns this time of year is the sod webworm. The adults appear as small gray or brown moths, which scatter eggs as they fly around the yard. Once hatched, the caterpillars chew on the tender grass blades, creating notched, ragged edges. Sod webworms prefer newly established lawns, and they attack many grass varieties, including Bermuda, Zoysia, Centipede, and St. Augustine.
A major infestation can wipe out a lawn in a matter of days, so if you notice irregular brown patches in your otherwise green yard, try a soap flush in the affected area to confirm. Add two or three tablespoons of liquid dish soap to a gallon of water and spread with a watering can over a small 3-foot by 3-foot section in the affected area. If webworms are present, the soap solution will force the caterpillars to the surface of the lawn.
Look for caterpillars up to ¾ inch, covered in fine hairs with a dark head. Their bodies vary in color from light pink or green to a yellow brown. Treat the infested areas with Bt insecticide in the early evening, when the caterpillars begin to feed.
If you have additional questions about pest infestations or unidentified damage to your grass, give us a call at 706-800-4010.