Some biological aspects and life table of theoat bird-cherry aphid, Rhopalosiphum padi L. feed on wheat (Sids 1) were studied at constant temperatures of 18º±2, 22º±2 and 26±2ºC.At a given temperatures, the time needed for the development of nymphal instars decreased significantly with the increase in temperatures.The longest period was recorded at 18±2ºC while the shortest one was found at 26±2ºC...