CARABIDAE-; Philonthus atratus; INSECT-PREY; Mamestra brassicae (Lepidoptera); Consumption rate experiments; FEEDING-RATE; Lepidopteran prey consumption experiments, implications for prey mortality Mamestra brassicae; HYMENOPTERAN-PARASITES; Aleiodes, Microplitis mediator & Trichogramma semblidis; Prevalence & causes of immature stage mortality; MORTALITY-; Eggs, larvae & pupae, patterns & causes, cabbage field habitat; SURVIVAL-; Model based on mortality factor estimates; PREDATORS-; Causes of egg, larval & pupal mortality; DISTRIBUTION-WITHIN-HABITAT; Larval dispersal behaviour, mortality relationships; CULTIVATED-LAND-HABITAT; Mortality of immature stages & larval dispersal; CLIMATE-AND-WEATHER; Causes of immature stage mortality, analysis; NORWAY-; South east, As; Mortality of eggs, larvae & pupae & larval dispersal, cabbage fields Aleiodes (Aleiodes); Microplitis mediator; Trichogramma semblidis; LEPIDOPTERAN-HOSTS; Mamestra brassicae; Cabbage fields; NORWAY-; South east, As; Prevalence & role in host mortality none