The study were conducted on life table parameters for bird cherry-oat aphid,Rhopalosiphum padi (Linnaeus) (Hom., Aphididae), on wheat seedlings at 15, 20 and 25^oC constant temperatures. The survival rates were 77.2, 77.7 and, 62.5% at 25, 20 and 15^oC, respectively. Time to 50% mortality (days) decreased gradually to 33.5, 30.5 and 17.5 by temperature increase from 15, 20 to 25^oC, respectively. The longest mean generation time (T) (28.66 days) was recorded at 15^oC. This duration decreased gradually (17.10 and 12.24 days) by the increase of temperature from 20 to 25^oC, respectively. Highest net reproductive rate (R_o) as 41.56 was recorded at 20^oC then decreased gradually to 31.375 and 27.36364 at 15 and 25^oC, respectively. The rate of Intrinsic increase (r_m), recorded as 0.270 at 25^oC, followed by 0.218 at 20^oC and the lowest as 0.120 at 15^oC. Rate of finite increase (exp. r_m) followed the same sequence of (r_m). It was recorded as 1.310, 1.243 and 1.128 at 25, 20 and 15^oC, respectively. The highest population doubling time (PDT) reached (5.765 days) at 15^oC. This value was lower (3.180 days) at 20^oC followed by (2.564 days) at 25^oC, respectively.