none Nutrition; Life cycle and development; Development; Parasites diseases and disorders; Parasites; Insect parasites; Hosts; Insect hosts; Host parasite relationships; Abiotic factors; Physical factors; Light Pieris brassicae (Pieridae); Diet; Vitamin A, effects on photoperiodic induction of parasite diapause; Hymenopteran parasites; Apanteles glomeratus; Vitamin A dependence of photoperiodic induction of parasite diapause; Reaction of parasite to host; Apanteles glomeratus (Hymenoptera) diapause; Photoperiodic induction dependence on host dietary vitamin A Apanteles glomeratus (Braconidae); Diapause; Photoperiodic induction; Lepidopteran hosts; Pieris brassicae; Reaction of parasite to host; Pieris brassicae (Lepidoptera); Vitamin A dependence of photoperiodic induction of parasite diapause; Photoperiod; Diapause induction, effects of lepidopteran host dietary vitamin A