Chryseobacterium gleum infection

The causative agent of the disease is the bacterium Chryseobacterium gleum, a gram-negative microorganism commonly found in soil and aquatic environments. In agricultural settings, it acts as an opportunistic pathogen capable of causing severe systemic infections that lead to rapid tissue degradation in various agricultural crops.

This pathogen primarily targets vegetable crops, including leafy greens, cruciferous vegetables, and root crops during storage. It poses a significant threat to production stability, as the bacteria thrive in environments with high moisture levels and warm temperatures, often leading to total loss of infected batches.

Symptoms of the infection typically manifest as water-soaked lesions that quickly evolve into soft, pulpy rot. The affected tissues lose their structural integrity and often emit a pungent odor due to the enzymatic breakdown of plant cell walls. In advanced stages, the infection can cause systemic wilting and yellowing of the foliage.

The development and spread of Chryseobacterium gleum are strongly favored by high humidity and moderate-to-high temperatures. The pathogen spreads via contaminated water, infected soil particles, and mechanical contact through agricultural machinery or tools. Fresh wounds on plants, often caused by pests or manual handling, serve as primary entry points for the bacteria.

The economic impact of this bacterium is largely felt through post-harvest losses and reduced marketability of fresh produce. Effective control strategies include:

• Strict crop rotation practices to minimize soil-borne inoculum.
• Sanitation and disinfection of storage facilities and tools.
• Integrated pest management to prevent mechanical damage to tissues.
• Maintaining optimal temperature and humidity during storage.