MENNENI Group — Nurturing Nature for a Better Tomorrow

Paddy Blast Disease: Symptoms, Diagnosis & Management

Identify leaf blast, node blast, and neck blast in paddy with spindle-shaped lesions. Learn preventive bio-fungicides and cultural management.

Visible Symptoms

Spindle-shaped or eye-shaped spots with gray or whitish centers and reddish-brown borders on leaf blades; black lesions at stem nodes and panicle neck causing chaffy grains.

Primary Causes

  • Fungal pathogen Magnaporthe oryzae (Pyricularia oryzae).
  • Excessive nitrogen fertilizer application without balanced potash.
  • High relative humidity (> 90%) and cool night temperatures (18–24°C) with heavy dew.

MENNENI Products

  • Neem Oil 10,000 ppm — Neem oil for crop care. 1 L pack, pan-India delivery.
  • Vermicompost — Vermicompost made by earthworm decomposition of organic matter. 1 kg pack, pan-India delivery.
  • Ghana Jeevamrutham Manure — Ghana jeevamrutham, a solid fermented organic manure for natural farming. 1 kg pack, pan-India delivery.

Frequently Asked Questions

When is neck blast most dangerous in paddy?

Neck blast is most devastating during panicle emergence and flowering. A single lesion at the panicle neck cuts off sap flow, turning the entire earhead white and empty (chaffy grains).