Tuber rot

Tuber rot
    Causal organism: Fusarium sp., Rhizoctonia sp.
    Symptoms: Complete loss disease. lower leaves show yellowing. Wilting of plant. Vascular discoloration.
    Etiology
    • Septate mycelia
    • micro& macro conidia ,as asexual spores borne in sporodochium
    • Sexual spores are ascospores borne in perithecium .
    • Primary source of inoculum : Chlamydospores, affected tubers.
    • Secondary source of inoculum : Micro& macro conidia.
    Epidemiology
    • Temperature- 28-320C.
    • RH - 80-85%.
    • Acidic pH - 5.5 to 6.0
    • Susceptible host.
    Taxonomy
    Kingdom: Fungi:
    Division: Deuteromycota
    Class: Deuteromycetes
    Order: Moniliales:
    Family: Tuberculariaceae
    Genus: Fusarium
    Management
    Cultural
    • Summer plouging.
    • Soil sterilization.
    • Affected plant uproot & burn.
    • Neutralize the soil PH
    • Recommended N:P:K
    • Crop rotation.
    Chemical
    • Carbendazim 0.1% (Soil drenching)
    Biological
      • Apply Trichoderma viridae.

Last modified: Thursday, 1 March 2012, 10:28 AM