Fourteen cultivars were used to assess the cultivars reaction and latent periods to stripe rust at various growth stages. The main objectives of this study were to evaluate the expression of adult resistances at various growth stages of fourteen wheat cultivars and to assess the effect of such resistances on stripe rust development in the filed. Fourteen wheat cultivars were evaluated for resistance in the greenhouse at four growth stages from seedling to booting using stripe rust race 198E156. Resistance was measured by infection types and latent period. The cultivars were also evaluated in the field using the same race to evaluate disease severity and disease progress. Cultivars Sakha 69, Giza 160, Giza 163, Sids 7, Sids 8 and Sids 9 was the most susceptible cultivars (infection types 8 to 9 latent period 10-15 days), followed by Gemmeiza 7 (infection type 8-4 with latent period 12 to 22.3 days). However, as plants grew, resistance increased and was lower infection types and longer latent period. The changes in infection type displayed by Sakha 61, Sakha 93, Sakha 94, Giza 168, Sids 1, Gemmeiza 9 and Gemmeiza 10 were the greatest, intermediate reactions (infection types were 3-5 and latent period 21-23 days at tillering stages) were seen as early as the completion of stem elongation and changed to immunity infection type (0). Results obtained from field experiment revealed that cultivars Sakha 61, Sakha 69, Giza 168, Sids 1, Gemmeiza 9 and Gemmeiza 10 gave resistant reaction (0). On the other hand cultivars Sakha 69, Giza 160, Giza 163, Sids 7, Sids 8 and Sids 9 showed high susceptibility toward the stripe rust disease at seedling stage.