Detecção de Xanthomonas axonopodis pv. phaseoli em sementes de feijão em meio de cultura semi seletivo

To detect Xanthomonas axonopodis pv. phaseoli (Xap) in whole and crushed bean seed extracts, naturally contaminated and healthy bean seeds were used in the semi-selective media XCP1 and MT and in the non-selective medium 523. Seed extracts were also inoculated in the first leaves of bean plants. The semi-selective medium XCP1 was more efficient in the quantification and detection of Xap in whole bean seed extracts. Naturally contaminated seed extracts, inoculated in the first leaves of bean plants, showed the symptoms of bacterial blight.