White root rot

Scytinostroma galactinum:

Scytinostroma galactinum is a basidiomycete fungus that causes white heart rot in trees. It is commonly associated with conifers, especially spruce and fir trees. Here's an informative description:

Symptoms:

1. White Heart Rot: The fungus primarily infects the heartwood of trees, causing a decay characterized by a white, spongy or stringy appearance.
2. Reduced Wood Density: The decay leads to a reduction in wood density, impacting the structural integrity of the tree.
3. External Signs: While the decay occurs internally, external signs may include resin-soaked areas, fungal conks, or cankers on the bark.

Identification:

1. White Decay: Identify the white, spongy decay in the heartwood of infected trees.
2. Resin Bleeding: Note the presence of resin bleeding or fungal structures on the bark.

Disease Cycle:

1. Entry and Colonization: The fungus typically enters the tree through wounds or damaged areas, colonizing the heartwood.
2. Decay Progression: The decay progresses, causing structural damage to the tree.

Management:

Preventive Measures:

1. Tree Health: Maintain overall tree health to reduce susceptibility to infections.
2. Avoid Injuries: Minimize mechanical injuries to trees during logging or other activities.

Sanitation Practices:

1. Remove Infected Trees: Promptly remove and destroy infected trees to prevent the spread of the fungus.

Quarantine Measures:

1. Prevent Spread: Implement quarantine measures to prevent the movement of infected wood to uninfested areas.

Note: Control of heart rot fungi is challenging once trees are infected. Emphasis is often placed on preventive measures and early detection.