Sod Webworms Sod Webworms Crambus spp. When at rest, the moths fold their wings in a tent-like manner over their body. The tiny, oblong eggs are white to pale yellow. Each egg is about 0.5 mm long and 0.3 mm wide.
Most larvae vary from pinkish-white to yellowish to light brown.
They are 16 to 28 mm long when fully grown, with thick bodies, coarse hairs, and paired dorsal and lateral spots on each segment. The head is yellowish- brown, brown, or black. Individual grubs often assume a C-shaped position. Tropical sod webworms are greenish and up to 19 mm long. The actual species present in any given area, however, is highly variable.