Class 8 Biology Microorganisms: Friend and Foe Late blight of potato

Diseases in Plants: Late blight of potato

  • Pathogen
    • Fungus-like organism, Phytophthora infestans


  • Pathogen’s entry
    • Infectious spores transmitted by water/ wind
    • Wet/ humid conditions favor infection
    • Affects potato, tomato etc.




  • Symptoms
    • Potato leaf lesions
    • Reddish brown discoloration of potato tuber
    • Brown lesions on stem


  • Treatment
    • Applying appropriate fungicides at appropriate time can be helpful


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