none During 1974-1976 the mortality of hibernating codling moth larvae ranged from 22.9, to 36.2% in unsprayed apple orchards in the Skierniewice area. The commonest fungus recovered from field-collected larvae was Beauveria bassiana (Bals.) Vull., which accounted for 62% of the observed fungal infections. The most abundant parasites were Ascogaster quadridentatus Wesm. (Braconidae) and Pristomerus vulnerator Grav. (Ichneumonidae), which accounted for 31 and 27.8% of the total number of parasites collected, respectively. Periods of emergence of codling moths and parasites were also noted. Parasites diseases and disorders; Parasites; Insect parasites; Hosts; Insect hosts; Diseases and disorders; Diseases; Microbial diseases; Land and freshwater zones; Palaearctic region; Europe Digonochaeta setipennis; Platymyia westermanii (Tachinidae ); Braconidae; Ichneumonidae; Lepidopteran hosts; Cydia pomonella; Host parasite phenology; Host parasite relationships; Cydia pomonella (Lepidoptera), phylogeny; Poland; Skierniewice area, phenology Cydia pomonella (Tortricidae); Dipteran parasites; Digonochaeta & Platymyia; Hymenopteran parasites; Braconidae & Ichneumonidae; Host parasite phenology; Host parasite relationships; Parasitica (Hymenoptera) & Tachinidae (Diptera) phenology; Fungal diseases; Poland; Skierniewice area; Dipteran & hymenopteran parasites, phenology & fungal diseases