Description:

• Black rot is a bacterial disease primarily affecting cruciferous crops like cauliflower.
• It spreads through contaminated seeds, water, or tools and enters the plant through wounds or natural openings.

Damage Symptoms:

• Yellowing of leaf margins, progressing inward, forming characteristic ‘V’-shaped chlorotic spots.
• Blackening of veins and vascular tissues.
• In advanced stages, the infection may reach the root system, causing blackening of vascular bundles.
• Stunted plant growth and wilting.

Preventive Measures:

• Practice crop rotation.

Control Measures:

• Spray Agrimycin or Streptocycline.