Penicillium brevi-compactum

Systematic position and nature of the pathogen: Penicillium brevi-compactum belongs to the kingdom Fungi, phylum Ascomycota, and the genus Penicillium. It is a microscopic mold fungus that typically functions as a saprotroph in the environment, yet it acts as a facultative phytopathogen that can infect both growing crops and harvested agricultural products under stress or improper storage conditions.

Diseases and susceptible crops: This species is a major cause of penicillium mold on seeds and fruits. It frequently infects cereal crops such as wheat, corn, and barley, as well as oilseeds like rapeseed and sunflower. Furthermore, it is a significant problem for post-harvest vegetable and fruit storage, attacking tissues that are damaged or have high moisture content.

Biology and life cycle: The life cycle involves asexual reproduction through the production of conidia. These small spores are highly mobile, spreading efficiently via air currents, water splashes, or insect activity. Once they land on a susceptible host, they germinate and form mycelia that invade the plant tissue, secreting specialized enzymes to break down organic matter for nutrition.

Conditions for development and harmfulness: The development of this fungus is favored by high relative humidity (above 70-75%) and moderate temperatures ranging from +20°C to +28°C. The damage caused by this pathogen is significant: it leads to reduced seed germination rates, rot in harvested goods, and the accumulation of dangerous mycotoxins, such as mycophenolic acid, which pose serious health risks to humans and livestock.

Protection and control measures: To effectively mitigate the impact of Penicillium brevi-compactum, farmers should implement the following strategies:

• Maintain low humidity and proper aeration in grain storage facilities.
• Treat seeds with effective systemic fungicides before planting to prevent initial infection.
• Ensure rigorous sanitation of silos, warehouses, and transport equipment.
• Minimize physical injury to fruits and vegetables during harvest and handling.
• Rotate crops to reduce the survival of fungal spores in the soil.