The common bacterial blight of bean, caused by Xanthomonas effective means of survival and dissemination of the Xap. The health axonopodis pv. phaseoli (Xap), is a major disease of common beans quality of 34 samples of seeds lots of common beans produced in the in Brazil. Even though this pathogen is disseminated in all production state of Paraná during 1998/99 and 1999 were evaluated to the presence regions of the country, it has caused major damages in the states of of Xap in seed macerates plated on a semi-selective culture medium. Paraná, Rio de Janeiro and São Paulo and in Central Region of Brazil, Fifty percent of the seed lots were carrying out by Xap with an particularly during the rainy season. Infected bean seeds are most incidence range of 0.1% to 1.7%.
bean commom bacterial blight; Phaseolus vulgaris; bacteria
