Preimaginal mortality of the black-veined white Aporia crataegi Linnaeus, 1758 (Lepidoptera: Pieridae) at different phases of an outbreak cycle

This study investigates the long-term dynamics of preimaginal mortality of the black-veined white at diff erent stages of its life cycle (II-III instar larvae during the diapause and overwintering, V instar larvae, prepupae and pupae).The research was conducted in two locations: in the south of the Sverdlovskaya Oblast near Fomino village and in the suburban forests of the City of Novosibirsk.The mortality of black-veined white larvae during overwintering is shown to be independent of winter weather conditions and reaches maximum values (up to 89%) at the end of outbreaks.The decline of the black-veined white outbreak in the southern Sverdlovsk region was signifi cantly contributed to by mass mortality of V instar larvae due to the nuclear polyhedrosis virus and II-III instar larvae during overwintering.In Novosibirsk, the infection rate of V instar larvae, prepupae, and pupae by tachinid fl ies (Diptera: Tachinidae) and the high mortality of larvae during diapause and overwintering were found to have a similar eff ect.The parasitoid hymenoptera Cotesia Cameron, 1891 sp.(Hymenoptera: Braconidae) (specialised parasitoids of larvae) and ichneumonids (Hymenoptera: Ichneumonidae) (pupal parasitoids) did not signifi cantly contribute to reducing the density of the studied black-veined white populations.. : II-III , V , . : .., .., ( 89 %) . V . . V , (Diptera: Tachinidae) . Cotesia