Bolinia

Bolinia (lat. Bolinia) is a genus of fungi recognized in phytopathology for causing wood decay in various tree species. These fungi primarily attack woody tissues, leading to structural degradation and the impairment of the host's ability to transport nutrients and water effectively, which eventually causes necrosis.

This disease is predominantly found in hardwood species. While it can persist in natural forest environments, its impact on ornamental trees and timber plantations can be economically significant. The fungus thrives on host trees that have been compromised by environmental stress, past insect attacks, or mechanical wounds, which serve as entry points for infection.

The primary symptom of a Bolinia infection is the appearance of distinct, black, crust-like stromata emerging through the bark of the host. These structures are reproductive organs that indicate the fungus has established itself within the inner wood. As the infection progresses, the surrounding bark often exhibits cracking, and the underlying wood tissues lose their integrity.

• Emergence of dark, hardened stromatic bodies on the bark.
• Visible cracking and splitting of the bark surface.
• Gradual decline in crown density and foliage health.
• Internal wood rot leading to mechanical instability.

Developmental conditions for Bolinia are closely linked to high humidity levels and temperature fluctuations that favor fungal sporulation. The pathogen is particularly opportunistic; it spreads spores via air currents and rain splash, which settle on exposed wood surfaces or deep into crevices of the bark, initiating the mycelial colonization of the sapwood.

Management strategies for Bolinia focus on preventive sanitation and enhancing overall tree vigor. Pruning and immediate removal of infected branches or entire trees are essential to reduce the inoculum load in the area. Maintaining proper tree spacing and avoiding injury to the bark during maintenance activities significantly reduces the risk of new infestations.