Stalk End Rot

Causal organism – Fusarium solani (Mart.) Sacc., F semitectum var. majus

Symptoms:

  • The primary symptom is dropping of immature, young fruits.
  • Infection typically starts at the peduncle (stalk) end, forming dark brown lesions.
  • The fungus gradually weakens the peduncle, leading to fruit drop.
  • The disease is marked by softening of the rind near the stalk end and the underlying pulp.
  • At later stages, the affected rind turns dark brown.
  • Infected fruits retain their shape and do not shrivel, but may fall during strong winds or heavy rains.

Management-  

Cultural MethodChemical Control
Remove and destroy all infected plant partsFor effective control of the disease, two sprays of Thiophanate methyl 70% WP @ 2g/L at fortnightly intervals are recommended during the early stage of fruit development