Conidial Size of Erysiphe Polygoni Influenced by the Host Reaction

Erysiphe polygoni causing pea powdery mildew was infectious to green gram & black gram. Similarly the pathogen from green gram & black gram showed cross-infectivity when inoculated on pea. The size of conidia differ in different host. Conidia also varied in size on different cultivars of the same host. Susceptible cultivars showed increases size conidia than resistant and moderately resistant in all the three crops. Similarly on resistant cultivars the size of conidia reduced when inoculated from susceptible or highly susceptible cultivars.