The Aphis gossypii Glover is a cosmopolitan, polyphagous species and locally is a serious pest of okra, cucurbits, brinjal and chilli. It pass through four nymphal stages before adulthood. The objective of the present study was to determine the variations in biological performance of a okra population of A. gossypii on three food plants: brinjal (Solanum melongena L., Solanaceae), chilli (Capsicum frutescens L., Solanaceae) and bottle gourd (Lagenaria siceraria (Molino) Standl., Cucurbitaceae). The total nymphal period was longer (8.24±O.82 days) on brinjal, followed by chilli (7.64±0.96 days) and gourd (7.07±0.62 days) and the differences were significant. The reproductive period was maximum (11.37±0.06 days) on gourd, followed by chilli (10.67±1.63 days) and brinjal (9.97±1.33 days). The analyses of survival curves (1x) of A. gossypii revealed no significant difference among the three host plant tested. The highest age-specific number of nymphs/aphid/day (mx) occurred on gourd and brinjal at an age of six days with 4.1 nymphs/aphid, and the lowest on chilli with 3.8 nymphs/aphid on the sixth day. The tested host plants significantly affected the fecundity of A. gossypii (P < 0.05). Age-specific net fecundity rate (Ro) for A. gossypii was 36.57±2.23 nymphs/aphid on gourd and was significantly more than on brinjal (33.83±2.26 nymphs/aphid) and chilli (30.63±1.85 nymphs/aphid). The generation time (GT) of A. gossypii on the three food plants ranged between 11.87 days (on gourd) to 12.57 days (on chilli). The highest intrinsic rate of increase (rm) occurred on gourd (0.3031 aphids/aphid/day) and the lowest on chilli (0.2747 aphids/aphid/day). Doubling time (DT) is the period during which the population of an organism double its original size. Since its value is calculated by using the value of rm, it follows the pattern of the latter. The DT of A. gossypii significantly differ on different food plants (P < 0.01) and was shortest on gourd (2.29 days) followed by on brinjal (2.36 days) and on chilli (2.52 days).