Prevotella

The genus Prevotella, while widely recognized in microbiology as a component of animal microflora, is increasingly identified in agronomy as a pathogen associated with bacterial diseases in plants. These anaerobic bacteria can colonize plant tissues, particularly when the plant is under abiotic stress or possesses physical damage that allows entry into the vascular or intercellular spaces.

Various crops, including root vegetables, bulbs, and grain crops, are susceptible to Prevotella infections. It often manifests as a destructive pathogen in stored produce, where environmental conditions favor the proliferation of anaerobic organisms that break down plant structural integrity.

Symptoms include rapid tissue softening, characteristic foul odors associated with anaerobic decomposition, and discolouration of the infected areas to dark brown or black. The affected plant tissue typically loses all cellular structure, resulting in a watery, decayed mass that spreads rapidly if left unmanaged.

The development and spread of these bacteria are driven by high humidity, poor soil aeration, and the presence of injured tissues. Prevotella thrives in oxygen-deprived environments, which is why significant outbreaks are frequently observed in poorly ventilated storage facilities or in compacted, waterlogged soils in the field.

The economic impact of this pathogen is severe, primarily due to the speed at which bacterial rot can compromise entire harvests. Since chemical control options are limited once the infection is established, the focus of Prevotella management must remain heavily weighted towards sanitation and environmental control.

Management and prevention strategies include:

• Maintaining optimal soil drainage to prevent anaerobic conditions.
• Implementing strict sanitation protocols in storage facilities.
• Proper post-harvest drying and sorting to remove damaged produce.
• Controlling pests that cause mechanical damage to plants.
• Rotating crops to break the lifecycle of soil-borne pathogens.