Other Common Names
Bluegrass Webworm (larva)
Bluegrass Sod Webworm Moth (adult)
Bluegrass Sod Webworm (larva)
Synonyms and other taxonomic changes
Parapediasia teterrellus (Zincken, 1821)
Chilo teterrellus Zincken, 1821
Crambus camurellus Clemens, 1860
Forewing length 7-10 mm. (1)
Mature larva length 15-20 mm
Adult - mouthparts project foreward from head to form a snout; forewing variably pale brown to medium brownish-gray with jagged PM line, often having two large "teeth"; two dark gray or blackish streaks or blotches in medial area usually extend into the "teeth" of the PM line; ST line smooth and mostly straight, running parallel to outer margin for about two-thirds its length, then angling basally before reaching costa; terminal line dark, thin, edged proximally by several black dots; fringe pale brown; hindwing brownish-gray, more than twice as broad as forewing, with pale fringe.
Larva - head dark gray; body greenish-gray with series of spots forming ring around each abdominal segment. (3)
Ontario and New England to Florida, west to California, north to Nebraska.
Lawns, golf courses, grassy areas in general; adults may be flushed from grass during the day but are crepuscular/nocturnal and attracted to light.
Larvae present from spring through fall (they overwinter).
Larvae were reared on a variety of grasses with a pronounced preference for Kentucky Bluegrass
Multivoltine; overwinters as a mature larva within silk-lined tunnel in soil or thatch; in late spring and again in mid-summer, females drop eggs randomly while flying low over grass; generation time is 4-10 weeks, depending on temperature. (3)
One of the first Pyraloid moths recorded in North America! (1)
- forewing has toothed and jagged subterminal line, not smooth and straight.
- forewing is grayish-white with double ST line and less conspicuous dark shading in medial area.