Cotesia vestalis (parasitoid)
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Cotesia vestalis (parasitoid) (Haliday, 1834)
This species is an important solitary endoparasitoid of the diamondback moth larvae (Plutella xylostella). The species is native to Europe, but has been introduced into many countries. It is commercially available.
Larvae of the 2nd or early 3rd instar are preferred by the parasitoid. The larvae feed on the hemolymph and fat body of the host. They emerge while the host is still alive and pupate outside.