Alternaria Leaf Spot

Causal organism – Alternaria alternata (Fr.) Keissler

Ref. – Abhishek Singh et.al, Biological Forum – An International Journal 15(9): 80-85(2023)

Symptoms

  • Initial symptoms appear as concentric rings of varying sizes, light to dark brown in colour, on the leaves.
  • Infected leaves become decayed, dry, and eventually fall.
  • In severe cases, the entire plant may die.

Management

Cultural MethodChemical Control
Proper sanitation should be maintained in the orchard.Pruning of infected plant parts and pruned parts should be destroyed. Foliar application of Chlorothalonil 75 WP @ 2g/L Spray Carbendazim 50% WP @ 2g/L.Spray Tebuconazole 50%+ Trifloxystrobin 25% w/w WG (75 WG) @ 0.3 g/L