Acrophialophora fusispora

Acrophialophora fusispora is a soil-borne fungus belonging to the kingdom Fungi, phylum Ascomycota, and the genus Acrophialophora. This microorganism acts as a facultative parasite, capable of surviving in the soil as a saprotroph by feeding on organic debris, but it exhibits pathogenic characteristics when favorable environmental conditions occur.

The pathogen affects a wide range of agricultural crops. It is most frequently identified as a causative agent of root rot and wilt in vegetable, cereal, and industrial crops. The fungus penetrates the root system of plants, disrupting the absorption of water and minerals, which leads to gradual suppression of vegetation and reduced crop yields.

The biology of the fungus is closely linked to soil temperature and moisture. Acrophialophora fusispora thrives in warm conditions with moderate soil moisture levels. Its development cycle involves the formation of conidia, which are dispersed by soil-dwelling insects, water runoff, or mechanical cultivation. The mycelium grows into the epidermis of the roots, gradually colonizing the host's vascular system.

The harmfulness of this pathogen is reflected in the premature death of seedlings and a significant decline in the quality of produce. In cases of severe infection, chlorosis of leaves, curling of leaf margins, and necrosis of the root collar are commonly observed. In greenhouse conditions, the fungus can infect young transplants, causing mass damping-off.

The protection strategy involves a combination of agronomic and chemical measures. The main control methods include:

• Following crop rotation practices by excluding susceptible plant species.
• Maintaining an optimal irrigation regime to prevent waterlogging.
• Soil disinfection in greenhouses and the use of fungicidal seed treatments.
• Application of bio-control agents based on Trichoderma to suppress pathogen activity.