Susceptibility of Bean Genotypes to Xanthomonas campestris pv. phaseoli in Greenhouse Conditions

Plants of 17 bean genotypes were evaluated under greenhouse conditions for their reaction to X. campestris pv. phaseoli, the causal agent of common blight of beans, follow-ing leaf-spray inoculation with bacterial suspension (108 cfu/ml). The plants were evaluat-ed based on the number of leaf lesions, and the disease severity index (DSI) was calculated. The evaluated genotypes showed various levels of susceptibility to X. campestris pv. phase-oli strain VS-1. The results of both experiments showed that the cultivar Oreol was the most resistant. The genotypes: KB 142, HR-45, Tisa and Panonski tetovac also showed low suscep-tibility with DSI values in the first trial ranging from 2.27 to 3.60. The same genotypes, with the exception of Panonski tetovac, were also categorized as low-susceptible to the bacte-rium in the second experiment, having the DSI values between 2.27 and 3.60. Most geno-types (Slavonski žutozeleni, Zlatko, Biser, Sremac, Naya Nayahit) were categorized as suscep-tible in the first experiment, including Panonski tetovac in the second one, while the geno-types Dvadesetica, Prelom and Oplenac displayed the highest susceptibility in both trials