About Hellula undalis (Fabricius, 1781)
Hellula undalis, commonly known as the cabbage webworm or Old World webworm, is a moth species that belongs to the family Crambidae. This is a widespread species, distributed from Europe through Asia to the Pacific region. Although it was first described from specimens collected in Italy, it is primarily a tropical or subtropical species, and only occurs occasionally in Europe. The wingspan of this moth reaches approximately 18 mm. Its forewings are greyish-brown, marked with wavy grey patterns, a curved pale subterminal patch, and a kidney-shaped mark located one third of the way along the wing. The hindwings are pale overall, with the tips of the hindwings being an even lighter shade. Hellula undalis is known to be a pest of two cultivated brassicas: Brassica oleracea (cabbage) and Brassica rapa (turnip).
