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. Collar rot and Root rot – Sclerotium rolfsii

1. 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

• 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.

• Collection and removal of fallen leaves
• Spray with Mancozeb 0.25%

• 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.

• Heavy application of FYM with Trichoderma viride

• 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.