none Nutrition; Diet; Life cycle and development; Parasites diseases and disorders; Parasites; Insect parasites; Hosts; Insect hosts; Host parasite relationships; Ecology; Population dynamics; Habitat; Man made habitat; Land and freshwater zones; Palaearctic region; Europe Meligethes aeneus (Nitidulidae); Food plants; Brassica rapae (rape); Plant development influence on mortality; Life cycle; Mortality relationship; Hymenopteran parasites; Diospilus; Phradis & Tersilochus; Prevalence; Tersilochus heterocerus (Hymenoptera); Mortality; Influencing factors; Cultivated land habitat; Sweden; Skane; Alnarp; Mortality factors, crop fields Diospilus capito (Braconidae ); Phradis (Ichneumonidae ); Coleopteran hosts; Meligethes aeneus; Host mortality; Cultivated land habitat; Sweden; Skane; Alnarp; Coleopteran host mortality, parasite significance, crop fields Tersilochus heterocerus (Ichneumonidae); Coleopteran hosts; Meligethes aeneus; Host mortality; Prevalence; Meligethes aeneus (Coleoptera); Cultivated land habitat; Sweden; Skane; Alnarp; Coleopteran host mortality, parasite significance, crop fields