Acrophialophora blight

Acrophialophora blight is a fungal disease caused by the Acrophialophora genus, particularly Acrophialophora fusispora. This pathogen is recognized as a thermophilic fungus, which thrives in warmer climates and greenhouse environments, making it a persistent threat to commercial agriculture in high-temperature conditions.

The disease affects a wide range of hosts, including various vegetables, grains, and specialty crops. The fungus acts as a soil-borne pathogen, infiltrating the vascular system or root zones of plants, which severely hampers the transport of water and essential nutrients, leading to systemic decline.

Symptoms often appear as irregular necrotic lesions on foliage or stems, accompanied by sudden wilting even when soil moisture is adequate. As the fungus progresses, the root system may show signs of decay, and infected plant tissues may develop fungal sporulation, which serves as an inoculum source for further spread through the field or greenhouse.

Development and dissemination are highly dependent on high soil temperatures and humidity levels. The fungus spreads easily via contaminated substrates, irrigation water, infected seeds, and physical contact with agricultural equipment. Its resilient nature allows it to persist in the soil for several growing seasons as a saprophyte.

Effective management requires a multi-faceted approach centered on hygiene and environmental control. Preventive strategies include:

• Solarization or chemical fumigation of growing media.
• Utilization of clean, fungicide-treated certified seeds.
• Optimization of ventilation systems to manage humidity and temperature.
• Application of bio-control agents to enhance soil microflora.
• Sanitization of all tools and greenhouse structures between growing cycles.