Coryneliaceae fungi

These fungi are highly specialized biotrophs capable of forming characteristic fruiting bodies known as perithecia, which protrude above the surface of the host plant's tissues.

The primary type of disease caused by members of this family is the formation of specific galls, tumors, or necroses on the bark and branches of perennial woody crops.

The pathogen's life cycle is closely linked to the host's phenology, with the fungus capable of surviving within plant tissues for extended periods of time.

The pathogenic process focuses on exhausting the plant's nutritional resources, leading to long-term structural changes in the vascular tissues of the branches.

The initial sign of infection is the appearance of small black, often columnar or club-shaped structures on the surface of the bark of young shoots.

As the disease progresses, the affected areas of the bark may crack, and tissue overgrowth resembling painful nodules or tumors is often observed underneath.

In areas where fungal fruiting bodies congregate, the bark takes on a necrotic appearance, becomes brittle, and loses its protective function for the inner layers of wood.

Foliage on heavily affected branches may turn chlorotic, gradually wilt, and drop prematurely due to the disruption of normal sap flow.

When examined in laboratory conditions, sections of affected areas reveal mycelial mats that penetrate deep into the bark and cambium layer.

The development of Coryneliaceae fungi depends directly on air humidity levels, as free moisture is necessary for spore germination and the formation of new fruiting bodies.

The spring-autumn season, characterized by moderate temperatures and frequent precipitation, is considered the most favorable period for infection as it ensures high humidity in the canopy.

The dispersal of conidia and ascospores in agroecosystems occurs primarily through wind and raindrops, which carry infectious propagules to healthy parts of the canopy.

Weakened plants with mechanical injuries to the bark are the most vulnerable targets for the initial colonization of the fungal mycelium.

High planting density, which hinders normal air circulation, creates a local microclimate that facilitates the rapid accumulation and spread of the inoculum.

The main danger lies in the gradual dieback of branches, which reduces the overall productivity of woody plantations and their aesthetic value.

In the case of fruit crops, the fungus indirectly reduces yield due to the plant's general stress state and insufficient nutrient supply to the fruit.

Prolonged parasitism by the pathogen creates favorable conditions for secondary colonization of weakened areas by pests and other pathogenic microorganisms.

The loss of bark integrity opens a path for bacterial infections, which can lead to more rapid development of necroses and the death of large scaffold branches.

In neglected cases, without sanitary measures, the disease can lead to the total loss of the economic value of individual plants.

The main preventive method is regular sanitary pruning and the immediate removal of all branches showing signs of infection.

Cuts must be treated with wound dressings or disinfecting solutions to prevent re-infection of open wounds by fungal spores.

Applying copper-based fungicides in the early spring, before bud break, allows for a significant reduction in the infection load on the bark surface.

Maintaining high agronomic standards by ensuring plants receive essential nutrients is crucial for enhancing their natural immunity.

To prevent the spread of the disease, sufficient spacing between plants should be maintained during planting to ensure effective canopy ventilation.