Bracon brevicornis (Hymenoptera : Braconidae) was observed to parasitise the larvae of cashew leaf and blossom Webber Lamida moncusalis Walker. The extent of parasitization by B.brevicornis ranged from 0.9 to 20.2 per cent with maximum parasitization during first fortnight of May coinciding with maximum activity of the pest. Maximum temperature and the parasitoid activity exhibited significant positive relationship with the pest population. Nutrition; Diet; Parasites diseases and disorders; Parasites; Insect parasites; Hosts; Insect hosts; Ecology; Population dynamics; Habitat; Man made habitat; Abiotic factors; Physical factors; Land and freshwater zones; Oriental region; India Lamida moncusalis (Pyralidae); Food plants; Cashew; Hymenopteran parasites; Bracon brevicornis; Population size; Hymenopteran parasite prevalence & weather factors effect; Cultivated land habitat; Climate and weather; Humidity; Temperature; Orissa; Bhubaneswar; Abundance, influence of hymenopteran parasite prevalence & weather factors, plantation Bracon brevicornis (Braconidae); Lepidopteran hosts; Lamida moncusalis, effect on host abundance on food plant; Cultivated land habitat; Orissa; Bhubaneswar; Prevalence, lepidopteran host, plantation none