Pieris napi L Greenveined white butterfly

Although larvae of this widely distributed species often feed on cultivated brassica plants, they are rarely numerous and occur mainly on wild plants such as Sisymbrium officinale. This species is, therefore, of little economic importance.


Adults occur in May and June, and in late July and August. Eggs are laid singly on the leaves of host plants and the larvae feed in summer and autumn.


Adult 40-44 mm wingspan; forewings of male mainly white, more or less suffused with black both apically and basally, and venation darkened; forewings of female more extensively blackened, including two subcentral black spots; hindwings with underside mainly pale yellow, the venation dusted with black scales. Egg 1.3 mm long, pale green, spindle-shaped and ribbed longitudinally. Larva up to 30 mm long; body mainly velvet-green with yellow markings along either side (unlike the following species there is no yellow dorsal line).

Pieris rapae (L.)

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