Components contributing to dilatory resistance to Puccinia polysora Underw. in corn
Phytopathology 76(10): 1098
Four characters of southern corn rust, pustule incidence, size, tumescence, and rupture were evaluated in the field and greenhouse to determine relative consistency on individual corn genotypes and their contribution to dilatory resistance. Inoculated plants of a susceptible genotype consistently had greatest pustule incidence. Pustules on this genotype were significantly larger, more tumid, and ruptured earlier than pustules produced on more resistant corn genotypes. A genotype from a cross of susceptible parents followed a similar pattern of susceptibility when compared to genotypes from crosses of parents with dilatory resistance.