Entophysalis granulosa

Entophysalis granulosa is a type of cyanobacterium that, under specific environmental conditions, can act as a plant pathogen, colonizing the surface of various plant organs. Its ability to form dense, granular layers makes it a significant concern in both intensive field production and specialized greenhouse agricultural environments.

This organism primarily affects crops grown in high-moisture conditions, including aquatic plants, rice, and those cultivated through hydroponic systems. By forming biofilms on the plant surface, it hinders gas exchange and negatively impacts the photosynthetic capacity of the host plant, leading to stunted growth.

Symptoms of infestation include the appearance of distinct, hard, granular coatings on foliage, stems, or root systems. In advanced stages, the infected plant tissues may show signs of necrosis, chlorosis, or brittle texture, significantly reducing the vigor of the affected crop and its ability to withstand further environmental stress.

The development of Entophysalis granulosa is strongly favored by stagnant water, high mineral content in nutrient solutions, and constant exposure to light. High humidity and temperatures above 20°C facilitate rapid multiplication, allowing the pathogen to spread quickly across surfaces through contaminated water movement.

Damage caused by this organism is characterized by yield reduction and weakened plant immunity, which often invites opportunistic secondary infections. Integrated pest management, focusing on sanitation, water quality monitoring, and mechanical removal, remains the most effective strategy for mitigating the impact of this cyanobacterial pathogen.

• Regular cleaning and sanitization of irrigation and hydroponic equipment.
• Implementing effective drainage systems to prevent waterlogging.
• Monitoring nutrient solution quality to limit microbial bloom.
• Promoting air circulation to manage humidity levels.