Mortierella elongata

Mortierella elongata is a soil-dwelling fungus belonging to the Zygomycota phylum. While it is frequently found as a natural component of healthy soil ecosystems, under specific environmental stress or unbalanced soil conditions, it can become a pathogen, leading to root system decay in various plant species.

The host range for this fungus includes a wide variety of greenhouse vegetables, herbs, and horticultural seedlings. The pathogen is particularly aggressive toward plants that are struggling with poor environmental conditions or improper soil pH, which weakens their natural defense mechanisms against soil-borne microorganisms.

Symptoms of infestation are primarily underground, making early detection difficult. Above-ground signs include stunted growth, leaf chlorosis, and sudden wilting. A visual examination of the roots typically reveals discoloration, browning, and a lack of secondary root development, often accompanied by soft rot symptoms due to the fungal mycelium colonizing the plant tissues.

Environmental conditions that favor the development of Mortierella elongata include high soil moisture, poor drainage, and cool soil temperatures. These factors stimulate the germination of fungal spores. Propagation occurs primarily through contaminated water, infested soil debris, and the movement of equipment across the cultivation area, making sanitation a priority.

Effective management and protection against this pathogen require a focus on environmental control and soil health. Key strategies include:

• Maintaining proper irrigation schedules to prevent soil waterlogging.
• Improving soil aeration through organic matter management and structural improvements.
• Integrating biological control agents like Trichoderma species to suppress fungal growth.
• Implementing rigorous hygiene standards for greenhouse tools and equipment to prevent cross-contamination.