Abstract: The eggfruit and shootborer (EFSB), Leucinodes orbonalis (Crambidae), is a major exotic pest of garden egg, Solanum gilo, causing enormous shoot and fruit damage in Nigeria. Information of the biology is required for effective management of this field pest. Life history of EFSB was studied on susceptible variety Lv Makurdi at 27±3°C and 85±4% RH data on developmental period of immature stages and reproductive parameters and sex ratio were collected. Developmental stages consist of an egg, five larval instars, pupa and adult. Developmental periods observed were eggs (5.93 days), 1st instar (1.00 day), 2nd instar (1.16 days), 3rd instar (1.48 days), 4th instar (2.63 days), 5th instar (4.46 days), pupa (11.2 days), female (4.14 days) and male (4.31 days). The reproductive parameters observed were incubation period (5.93 days), pre-oviposition period (1.19 days), oviposition period (2.71 days) and post-oviposition period (3.75 days). The Male to Female ratio was 1:2 and actual fecundity and potential fecundity per female were 123 and 207 eggs , respectively. Laboratory studies reveal that EFSB, Leucinodes orbonalis will complete its life cycle in 28.17 days.