Inoculation techniques of the agents of common bacterial blight in Phaseolus vulgaris

Common bacterial blight (CBB) is an endemic disease of common bean (Phaseolus vulgaris) caused by Xanthomonas phaseoli pv. phaseoli (Xpp) and Xanthomonas citri pv. fuscans (Xcf). • A complete resistance to CBB is lacking and the efficacy of known resistance varies depending on the strain tested. • Methods for disease assessment and resistance scoring differ by their efficacy in differentiating the virulence of strains and the resistant genotypes . • Effective disease phenotyping methods are essential for searching novel resistant genotypes. • AIM: To select among 4 different inoculation methods the most effective for virulence discrimination, resistant genotype selection, time efficiency and assessment method.