Noun
webworm (plural webworms)
Any of various caterpillars, of diverse moth families, that spin a web; the moth species of such a caterpillar.
The moths do not damage your lawn, however they lay eggs for sod webworm, cutworm and other lawn damaging insects. Source: Internet
GrubEX in May will not only prevent grubs from doing damage late next summer, it will also provide some protection from the first generation of sod webworm that can show up in early summer. Source: Internet