none The level of parasitisation of stem borer, Chilo partellus (Swinhoe) larvae on sorghum genotypes at Hisar by Cotesia flavipes (Cameron), Sturmiopsis inferans Townsend, Bracon chinensis (Szepl.) and Stenobracon sp. varied from 16.2 to 25.5 and 19.2 to 29.1, 4 to 7.2 and 4.2 to 8, 0.6 to 4.8 and 0.6 to 5.2, 0.5 to 3.1 and 0.6 to 3.3 per cent during 1993 and 1994 respectively. Parasitisation was higher on susceptible sorghum genotypes as compared to resistant ones by all the parasitoids of C. partellus. Nutrition; Diet; Parasites diseases and disorders; Parasites; Insect parasites; Hosts; Insect hosts Sturmiopsis inferens (Tachinidae ); Bracon chinensis; Cotesia flavipes; Stenobracon (Braconidae ); Lepidopteran hosts; Chilo partellus; Prevalence on hosts related to crop strains Chilo partellus (Pyralidae); Food plants; Sorghum; Dipteran parasites; Sturmiopsis inferens; Hymenopteran parasites; Bracon; Cotesia & Stenobracon; Prevalence related to crop food plant strain