Abstract:

Some varieties showed adult plant resistance to bacterial blight(Xanthomonas campestris pv.oryzae).They were susceptible at seedlingstage but became resistant as plants mature.Among thirteen varieties possessing adult plant resistance to bacte-rial blight,some were resistant to all the four races tested while othe-rs to one or two races only.The adult plant resistance of rice to bac-terial blight seemed to be also race-specific.The disease score in somevarieties decreased gradually from seedling to booting ...