Phlebiopsis gigantea strains FOC PG B20/5, B22/SP1190/3.2, B22/SP1287/3.1, BU 3, BU 4, SH 1, SP log 5, SP log 6, and 97/1062/116/1.1

Phlebiopsis gigantea is a specialized biological fungicide consisting of selected fungal strains used to protect coniferous forests. It acts as a powerful antagonist that outcompetes pathogenic fungi for resources and space.

Upon application to fresh stump surfaces, the fungus rapidly colonizes the wood tissue. By creating a dense mycelial network, it effectively seals the stump and prevents the spores of tree pathogens from establishing an infection.

The mechanism of action involves both rapid growth and the production of specific biochemical metabolites. These compounds inhibit the germination and development of target pathogens on the wood surface.

Furthermore, Phlebiopsis gigantea actively breaks down wood components, which facilitates the natural decomposition of stumps while simultaneously maintaining an unfavorable environment for parasitic organisms.

This biological control method is a pillar of integrated forest management, offering a sustainable alternative to chemical treatments by utilizing natural microbial interactions.

The primary target of these strains is the root rot pathogen Heterobasidion annosum. This fungus is the most destructive pathogen in coniferous forests, causing severe wood decay and long-term mortality.

The treatment is essential for managing stump infection, which is a major entry point for root rot in spruce, pine, and fir plantations during and after harvesting operations.

Beyond root rot, the application of these strains helps to suppress secondary wood-rotting fungi that degrade timber quality and weaken the health of standing trees.

The use of these strains is particularly important in managed forests where frequent thinning or sanitary logging increases the risk of fungal spread through fresh wood exposures.

By protecting the root systems and wood structures of the stand, Phlebiopsis gigantea helps maintain the productivity and resilience of the forest ecosystem over the long term.

Application is performed by applying a suspension of spores to the freshly cut stump surface. The treatment must occur immediately after the tree is felled to be most effective.

The application rate is typically calibrated based on the number of stumps and their surface area. Modern forestry equipment, such as harvesters, can be fitted with automatic sprayers for precision.

The timing is optimal during the vegetation period when temperatures allow for vigorous fungal growth, ensuring that the stump is colonized before pathogens can penetrate.

• Apply immediately after cutting the tree
• Ensure full coverage of the stump surface
• Maintain appropriate spore concentration as specified by the product label
• Avoid application during freezing temperatures

The effectiveness of Phlebiopsis gigantea is dependent on the viability of the fungal spores. Products must be stored in cool, dark environments away from direct sunlight.

Compatibility with other chemicals is limited; chemical fungicides should not be used in combination with this biological treatment as they would neutralize its effects.

While the product is safe to use, standard health and safety measures should be followed, such as wearing protective gloves and avoiding inhalation of spore-laden dust or aerosols.

Environmental conditions such as extreme drought or waterlogging may influence the speed of colonization, though the strains are generally robust and adaptable to various forest conditions.

Effective management requires strict adherence to usage guidelines to ensure the beneficial fungus successfully dominates the target area before competing pathogens arrive.