Class 8 Biology Microorganisms: Friend and Foe Powdery mildew

Diseases in Plants: Powdery mildew

  • Pathogen
    • Fungi
    • Many species of order Erysiphales


  • Pathogen’s entry
    • Infectious spores are transmitted through wind
    • Sensitive to extreme heat & sunlight
    • Affects many crops like beans, beet, carrot, lettuce, melons, peas etc..


  • Symptoms
    • White powdery covering
    • Leaves curl
    • Appearance of lesions
    • Colored patches on leaves/ stems/ fruits


  • Treatment
    • Applying fungicides/ oils/ sulfur can treat the disease

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