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  • ICAR and TNAU E-Course Summarized

    Summarized Notes
  • ​Gummosis is associated with which fruit crop?

    Question: ​Gummosis is associated with which fruit crop?

    Options:

    Citrus fruits
    Papaya
    Bael
    Mango

    🔑 Key Points
    🍊 Gummosis
    → Gummosis is associated with Citrus fruits.
    → It is characterized by sap oozing from cracks in the bark.
    → Also known as leaf fall, footrot, or broom rot.
    → Gummosis is caused by the fungus Phytophthora spp., a soil-borne fungal disease.
    → An early symptom of gummosis is sap oozing from small cracks in the infected bark, giving the tree a bleeding appearance.
    → Management: Spray 0.1% aurofungin or Bordeaux mixture.

    📝 Additional Information
    🍊 Citrus Canker:
    → Causal Organism: Xanthomonas campestris bacteria
    → Vector: Phyllonorycter citrella (leaf miner)

    🍊 Dieback:
    → Causal Organism: Colletotrichum gloeosporioides

    🍊 Greening:
    → Causal Organism: Gracillicuts (gram-negative bacteria)
    → Vector: Diaphorina citri (psyllid)

    🍊 Tristeza:
    → Causal Organism: Citrus Tristeza virus
    → Vector: Toxoptera citricida

    🍊 Chlorosis:
    → Cause: Insufficient soil moisture and nutrients

    🍊 Root Rot:
    → Causal Organism: Phytophthora spp.

    🍊 Pink Disease:
    → Causal Organism: Pellicularia salmonicolor

    🍊 Citrus Exocortis:
    → Causal Organism: Viroid

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