none no species At Charleston, S. C. in 1978 and 1979 and at Blackville, S. C. in 1979, immature stages of the pickleworm (Diaphania nitidalis (Stoll) were collected on cucumber and densities were estimated. Populations were higher at Charleston than at Blackville. Egg parasitism by Trichogramma exiguum Pinto and Platner ranged from 0 to 69% at Charleston and appeared to be density dependent and limited to late in the season but was unrecorded at Blackville. Larval parasitism (Apantales sp.) was low, ranging from 0 to 10%. Fire ants (Solanopsis spp.) were an important predator of pupae. Nutrition; Diet; Parasites diseases and disorders; Parasites; Insect parasites; Hosts; Insect hosts; Ecology; Population dynamics; Land and freshwater zones; Nearctic region; North America; USA Diaphania nitidalis (Lepidoptera); Food plants; Cucumis sativus (cucumber), hymenopteran predation & parasitism effect; Hymenopteran parasites; Trichogramma exiguum & Apanteles; Egg & larval mortality; Mortality; Eggs, larvae & pupae, hymenopteran predators & parasites effect; USA; Predators; Solenopsis (Hymenoptera); Pupal mortality; South Carolina; Charleston, hymenopteran parasitism & predation effect Apanteles (Braconidae); Lepidopteran hosts; Diaphania nitidalis; Host larval parasitism; South Carolina; Charleston; Lepidopteran host mortality Trichogramma exiguum (Trichogrammatidae); Lepidopteran hosts; Diaphania nitidalis; Host egg parasitism; South Carolina; Charleston; Lepidopteran host mortality Solenopsis (Formicidae); Prey; Diaphania nitidalis (Lepidoptera); Pupae; South Carolina; Charleston; Predation of lepidopteran pupae