Resistant, diseased and healthy plants of susceptible fieldpea cultivars were taken in field experiment with three sowing dates under irrigated and rainfed conditions. Activities of monophenolase, o-diphenolase, catalase, phenol concentrations and powdery mildew severity were observed in leaves at different growth stages, Levels of phenols were similar in resistance and healthy plants of susceptible cultivar along with higher activities of o-diphenolase and catalase. Through correlations, path analysis and association (%), the activities of o-diphenolase and catalase are of greater importance for disease resistance compared to activity of monophenolase and phenol concentration. The higher accumulation of phenolic compounds in diseased plants were due to non-conversion to their respective quinones.
