Screening of maize genotypes against polysora rust disease (Puccinia polysora Underw.) in Manipur

Abstract

To experiment conducted to assess the impact of the polysora rust disease on maize and to find some suitable resistant genotypes, inside a poly house at College of Agriculture, CAU, Imphal West, Manipur during 2021-22, revealed that almost all the fifteen maize genotypes screened showed low to moderate symptoms of polysora rust after artificial inoculation. Results revealed lowest average disease score (1.33) and PDI (14.78) in genotype “71354” and the highest average disease score (6.56) and PDI (72.89) in “RCM 76”. The genotypes RCM 76 showed the highest susceptibility, while 71354 demonstrated the highest resistance. Eight genotypes exhibited moderately resistant reactions, while the remaining five displayed moderately susceptible reactions.