AbstractA total of 259 accessions of wildTriticumspecies originating from different countries, along with 91 triticale (6×)× bread wheat true‐breeding derivatives, two bread wheat, and three triticale cultivars were screened for resistance to the Russian wheat aphid, a serious insect pest of the wheat crop. Twenty‐four entries with low damage ratings on the basis of amount of leaf rolling and leaf chlorosis were retested along with resistant and susceptible controls. On the basis of leaf roll damage ratings, eight entries including fourTriticum monococcumvar.boeoticum (T. boeoticum), oneT. monococcumvar.monococcum(T. monococcum), twoT. timopheeviivar.araraticum (T. araraticum), and one triticale cultivar were significantly superior to ‘Karl’ (susceptible control) wheat. Among these, four accessions — threeT. boeoticumand oneT. araraticum— were significantly superior to all other entries and were equal to the resistant control (PI 372129) in resistance rating based on leaf rolling and leaf chlorosis (exceptT. boeoticumTA 202). The leaf chlorosis damage rating of all accessions were significantly lower than that of the susc
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