Homona coffearia; HYMENOPTERAN-PARASITES; Phytodietus spinipes; Parasite biology & prevalence correlation with larval density; POPULATION-DENSITY; Larvae, hymenopteran parasite prevalence relationship; TAMIL-NADU; Coimbatore; Hymenopteran parasite prevalence related to larval density Phytodietus spinipes; REPRODUCTION-; LIFE-CYCLE; Laboratory observations, lepidopteran host; LEPIDOPTERAN-HOSTS; Homona coffearia; Biology & prevalence correlation with host density; TAMIL-NADU; Coimbatore; Prevalence in lepidopteran host, host density relationship Field studies carried out in tea plantations in Tamfl Nadu, India during 1984-88 on Phytodietus spinipes, a parasitoid of Homona coffearia, established that it played a significant role in regulating the tortricid population. The incidence of parasitism was significantly correlated with moth population density. The ichneumonids preferred late-instar larvae of H. coffearia for oviposition, and in the laboratory at 25-30'C and 75-90% RH development was completed in 19.15 + 0.17 days. none