Common Bacterial Blight (Xanthomonas axonopodis pv. phaseoli) of Beans with Special Focus on Ethiopian Condition

Abstract

This study was conducted to determine the effect of integrated management of common bacterial blight (Xanthomonas axopodai) of bean on disease development, yield and yield components. A field experiment was conducted at Chena district Dahera peasant association on farmers training center field during 2011/2012 main cropping season using four resistant common bean cultivars and one susceptible local check. Host resistance was integrated with seed treatment using Apron 2g/kg and cultural practice. The experiment was arranged in randomized complete block design in factorial combination with three replications. The results indicate that integrating of resistant varieties with chemical seed treatment and cultural practice were highly significant (p < 0.001) in reducing common bacterial blight development and increased seed yield and yield component of a bean. The highest percent severity index of common bacterial blight (71.95%) was observed in the control treatment when growing of local cultivar under farmer management practice. This level was reduced significantly to below 26% when planting chemically treated seed of the cultivars Awassa dumme, AFR-702 and Ibado on the ridges, with an average yield of more than 22 qt/ha. Generally, integrating host resistance with seed treatment and cultural practice could reduce the severity of common bacterial blight and increase yield and yield component of the bean. However, an extensive similar study should be conducted across different locations to come with a tangible recommendation.