Powdery Mildew

General Caused by Oidiopsis taurica. Survives on perennial pigeonpeas and volunteer plants growing in the shade, and on the ratoon growth of harvested stubbles. Early sowing and irrigation encourage disease development. Symptoms The initial symptoms develop as small chloritic spots on the upper surface of individual leaves (Fig.96). Subsequently the corresponding lower surfaces develop white powdery patches. Severe infections result in heavy defoliation (Fig.97). Management Select fields away from perennial pigeonpeas affected with the disease. Spraying wettable sulphur @ 2 g per liter of water effectively controls the disease.     initial Symptoms of powdery mildew      Severe infection that results                                                                              to heavy defoliation