Rreaction to xanthomonas translucens pvs. cerealis& translucens in wheat and barley cultivars

The susceptibility of 52 wheat and 12 barley cultivars to two pathovares of cereal’s bacterial leaf streak (BLS) was studied. The experiment was carried out under field conditions. Seeds of all cultivars were grown using randomized block design with 4 replications in the Alborz Research Institute, Karaj in 1999-2000 cropping season. In spring of 2000, 20 days after inoculation of seedlings with a suspension of bacteria (adjusted approximately to 109 cfu/ml) the percentage of infected area on the lower leaves were scored from %1 to %75 in 5 levels. Results showed that among wheat cultivars, Kavkaz, P.K., Sardari, Adle and Golestan were more susceptible and Kaveh, Mahooti, Maroon, Shiroudi, Chenab, Niknejad, Bayat, Moghan 1, Morocco, Cross Azadi, Alborz, Hirmand and Arvand cultivars showed resistant reactions to BLS. In barley cultivars Zarjo, Karoon, Dasht, Goharjo, were more susceptible and. Aras, Eram and Valfajr were more resistant.