Bacterial rots (Bacteroidaceae)

Bacteroidaceae represent a significant group of Gram-negative anaerobic bacteria that can act as opportunistic pathogens in plant pathology. These organisms are primarily responsible for the development of soft rots and various types of tissue degradation in a wide variety of horticultural and field crops.

The host range for these bacteria is broad, affecting essential crops such as potatoes, onions, carrots, and brassicas. The pathogens invade plant tissues primarily through wounds caused by weather events, harvesting equipment, or feeding damage by insects, leading to rapid degradation of the plant cell walls.

The primary symptom of infection is the sudden appearance of water-soaked lesions. These lesions quickly expand, leading to the collapse of the plant architecture as the pectin-rich middle lamellae of the cells are broken down. In advanced stages, the plant tissue turns into a foul-smelling, mushy mass, often accompanied by the release of cellular fluids.

Development is heavily favored by environmental conditions such as high humidity and moderate to high temperatures. Poor soil drainage or insufficient ventilation in storage facilities creates an optimal environment for the bacteria to multiply and colonize neighboring healthy tissues, causing significant economic losses.

Effective management requires an integrated approach to minimize moisture stress and physical injury to crops. Prevention is the key strategy, as there are limited curative treatments available once infection is established.

• Implement proper crop rotation to reduce soil-borne inoculum.
• Practice careful handling during harvest to minimize wounding.
• Ensure optimal drying and curing of produce before long-term storage.
• Sanitize storage facilities and equipment regularly.
• Manage insect pests that provide entry points for bacterial infiltration.