Last modified: Sept. 23, 2022, 10:33 a.m.
New to Belgium in 2022 in AN.
Originally an East Asian species, but introduced in Europe (early 1970s) and the United States (2011).
Wingspan about 12 mm. Two forms occur: one with plain blackish wings (first generation), the other one with distinctive yellow spots (second and third generations), 1 pair near wing base and another pair at tip. Both forms have diagnostic yellow abdomens.
The larvae lives in a loose silken web between the young leaves and flower buds on tip of the food plant.
The adults fly from early June towards late September in 2 or 3 generations a year.
Urban environment, disturbed and industrial areas, arable land, road sides etc...