The Cotton Bollworm, American bollworm, Corn Earworm, Tobacco Budworm or Old World Bollworm (Helicoverpa armigera, also known as the Scarce Bordered Straw in the UK, where it is an immigrant) is a moth whose larvae are known to feed on a wide array of plants including a range of plants cultivated by humans. They are the major pest in cotton and among the most polyphagous and cosmopolitan pests. They should not be confused with the similarly-named related species Helicoverpa zea.
- Waring, Paul, Martin Townsend and Richard Lewington (2003) Field Guide to the Moths of Great Britain and Ireland. British Wildlife Publishing, Hook, UK, p. 374.