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Horticultural crops :: Flowers :: Jasmine

  1. Cercospora leaf spot – Cercospora jasminecola
  2. Alternaria leaf spot – Alternaria jasmini, A. altenata
  3. Collar rot and Root rot – Sclerotium rolfsii
  4. Phyllody – Phytoplasma
  1. Cercospora leaf spot – Cercospora jasminicola

Symptoms:

  • Circular to irregular reddish brown spots of 2-8 mm dia appear on the appear surface of the leaves.
  • Later the spots become irregular covering larger areas of the leaves.

Management:

  • Spraying with Carbendazim 0.1%
  1. Alternaria leaf blight – Alternaria jasmini, A. alternata

Symptoms:

  • In the leaves dark brown spots appear.
  • On fumed condition the spots enclanges covering larges area causing blighting of leaves.
  • Concentric rings can be seen the lesions. The disease also affects stem, petiole and flowers.

Management:

  • Collection and removal of fallen leaves
  • Spray with Mancozeb 0.25%
  1. Collar rot and Root rot – Sclerotium rolfsii

Symptoms

  • Plants at all stages are infected. First the older leaves become yellow followed by younger leaves and finally death of the plant.
  • In the root black discoloration can be seen.
  • On the infected tissues and stem surface white strands of mycelia and mustard like sclerotia are seen.

Management:

  • Heavy application of FYM with Trichoderma viride
  1. Phyllody – Phytoplasma

Symptoms:

  • Leaves become small malformed and bushy. In the place of flowers green leaf like malformed flowers are formed.

Management:

  • Selection of cuttings from healthy plants.
  • Spraying insecticide to control the vector.
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