Development, survival and reproductive potential of the cabbage aphid were studied at ýconstant temperatures (20,24 and 28°C). At given temperatures, the time needed for the development of nymphal instars decreased significantly with the increase in temperature. the longest period was recorded at 20°C while the shortest one was found at 28 °C. The calculated developmental threshold of the whole nymphal stage was estimated as 7.17°C. the thermal units needed for the development of the whole nymphal stage of the cabbage aphid were 97.78 day degrees. Generation time (GT), reproductive potential (RO), population-doubling time (DT), intrinsic (rm) and finite rate (גּ.) of increase of the pest were also computed and discussed. Based on the obtained data, temperatures of 20°C and 24°C were the most suitable temperatures for the development and multiplication of the cabbage Aphid