none Aphidius colemani; CONTROL-OF; Aphis gossypii (Hemiptera); FECUNDITY-; LARVAL-DEVELOPMENT; HEMIPTERAN-HOSTS; Aphis gossypii; Parasitoid intrinsic rate of increase; Host control implications; POPULATION-DYNAMICS; Intrinsic rate of increase, temperature relations; MORTALITY-; Immature stages, intrinsic rate of increase relations; Temperature effects, hemipteran host control implications Aphis gossypii; CONTROL-BY; Aphidius colemani (Hymenoptera); HYMENOPTERAN-PARASITES; Aphidius colemani; Parasitoid intrinsic rate of increase; Temperature relations; TEMPERATURE-; Hymenopteran parasite intrinsic rate of increase relations; Control implications Increasing problems with chemical control of cotton aphid, Aphis gossypii Glov., in vegetable crops necessitate development of a biological control programme. An endoparasitoid of cotton aphid, Aphidius colemani Vier., is one of the candidate control agents. Data on longevity, reproduction, and development of A. colemani with A. gossypii as host are presented in this paper. The parasitoid has a fecundity of 302 eggs per female at 20 degree C and 388 eggs per female at 25 degree C, a developmental period of 12.7 days at 20 degree C and 10.0 days at 25 degree C, and an immature mortality of 14.1 % at 20 degree C and 27.8% at 25 degree C. The intrinsic rate of increase of the parasitoid is both at 20 and at 25 degree C comparable to the intrinsic rate of increase of the cotton aphid. Aphidius colemani seems, therefore, a promising candidate for biological control of cotton aphid.