Erwinia and Pseudomonas species

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Erwinia and Pseudomonas species

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Erwinia and Pseudomonas species

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Bacterial soft rot is a devastating disease affecting cauliflower and various other vegetables. Caused by bacteria like Pectobacterium carotovorum (formerly Erwinia carotovora) and Pseudomonas species, it leads to tissue breakdown, resulting in soft, foul-smelling decay. The disease thrives in warm, moist conditions and can cause significant post-harvest losses if not managed properly.

Symptoms of Bacterial Soft Rot

Water-soaked lesions on leaves, stems, and flower heads. Lesions expand into a large rotted mass. Cracked surfaces exuding slimy liquid that turns tan, dark brown, or black on exposure to air. Tissue becomes soft, mushy, and may collapse. Strong, unpleasant odor associated with rotting tissue.

Causes and Spread

Entry through wounds caused by hail, fertilizer burns, or harvest damage. Spread through contaminated tools, water, insects, and plant material

Bacteria survive in soil and plant debris. Moisture from prolonged rain or irrigation promotes infection

Prevention and Management

Resistant Varieties: Use disease-resistant plant varieties when available. Proper Planting: Maintain good air circulation by planting in well-spaced rows

Careful Handling: Avoid injuring plants during cultivation or harvesting. Tool Sanitation: Clean and disinfect cutting tools regularly. Water Management: Avoid overhead irrigation to reduce moisture buildup. Dry Weather Harvesting: Harvest only during dry weather Inspection: Inspect produce before storage.

Effective management of bacterial soft rot requires a combination of preventive practices and vigilant monitoring. By maintaining hygiene and adopting proper cultivation techniques, farmers can reduce disease incidence and ensure better crop health and quality.