Phlebiopsis gigantea strain VRA 1835

Phlebiopsis gigantea is a saprotrophic basidiomycete fungus utilized as a highly effective biological fungicide in modern forestry management.

The VRA 1835 strain is specifically selected for its aggressive colonization of woody substrates and its ability to outcompete pathogenic organisms.

The mode of action is purely biological, involving the rapid growth of mycelium over the surface of fresh tree stumps following timber harvesting.

By consuming available nutrients and physically occupying the surface area, the fungus effectively prevents the germination and penetration of harmful pathogens.

This process is considered environmentally benign as it utilizes naturally occurring forest fungi to manage phytosanitary conditions without synthetic chemicals.

The primary target of this strain is Heterobasidion annosum, the causal agent of annosus root rot, which is a devastating disease in coniferous forests.

Preventing the establishment of this pathogen on fresh stumps is crucial for protecting neighboring healthy trees from root-to-root transmission.

The product is typically supplied in a concentrated form and must be diluted with clean water shortly before the intended application in the field.

Application should occur immediately after felling, ideally within the first 24 hours, to ensure the beneficial fungus establishes before the pathogen arrives.

The dosage is applied to fully cover the stump surface, ensuring that the bark-wood interface is thoroughly treated for optimal prevention.

Work is performed throughout the logging season, provided temperatures are high enough to support the metabolic activity of the fungal mycelium.

Proper calibration of spraying equipment is essential to ensure consistent coverage across all treated stumps in a given stand.

The use of synthetic fungicides must be strictly avoided as they can inhibit the development of the Phlebiopsis gigantea strain, negating the treatment.

Application during heavy rainfall should be avoided to prevent the washing away of spores before they can adhere to the stump wood.

Operators should wear protective clothing and adhere to standard safety protocols while handling biological inoculants to prevent irritation.

Storage conditions must be strictly followed, typically requiring refrigeration or cool, dry storage to maintain the viability of the fungal spores.

Always verify the batch expiry date, as the effectiveness of the treatment relies on the concentration of living, active fungal spores.