Dichotomopilus dolichotrichus

Dichotomopilus dolichotrichus is a microscopic fungus classified within the order Sordariales. In agricultural phytopathology, it is recognized as a mold-forming agent frequently associated with the decomposition of plant debris and stored seed materials. While often acting as a saprophyte, it can demonstrate pathogenic activity, especially under conditions of physiological stress in the host plant.

This pathogen primarily affects the seeds and seedlings of various cereal and legume crops, as well as fruits and vegetables during storage. The fungus is highly efficient at colonizing cellulose-rich substrates. Seed contamination by this organism is particularly dangerous, as it leads to a rapid decline in germination energy, viability, and overall field establishment of the crop.

The primary clinical signs of infestation include the emergence of a white or grayish mycelial mat on the seed coat or plant tissue surface. Microscopic analysis often reveals clusters of fruiting bodies. Affected plant parts frequently become necrotic or soft, often emitting a distinct fungal odor, which indicates the enzymatic degradation of cell walls and structural integrity.

The development and dissemination of Dichotomopilus dolichotrichus are strictly governed by microclimatic conditions. High relative humidity (exceeding 75-80%) combined with optimal temperatures ranging from +20°C to +28°C provides the ideal environment for explosive growth. The fungal spores are easily dispersed via air currents, moisture droplets, and contaminated agricultural machinery, facilitating rapid spread within storage facilities.

The economic impact of this fungus is primarily seen in the loss of seed quality and storage inventory. To minimize risks, the following protective measures are advised:

• Drying seeds to a moisture content below 14% prior to storage.
• Rigorous seed cleaning to remove damaged or contaminated particles.
• Sanitization of storage facilities using appropriate fungicide treatments.
• Application of specialized seed dressings to protect germinating embryos from soil and seed-borne pathogens.