dry rot

The brown rot (also Destruktionsfäule ) is a form of wood rot. Wherein caused by wood-destroying fungi process cellulose is largely degraded, which is one of the main constituents of wood. The wood loses strength and mass, and developed one for Braunfäuleschäden typical transverse cracked structure, the so-called " die cut".

The wood at the same time takes on a dark brown color as the brown lignin is largely preserved, while the bright cellulose is destroyed. In the advanced stage of attack by brown rot the wood has no more carrying capacity and can grind to powder between the fingers.

Brown rot can occur both in the living tree as well as in dead, such as wooden constructions. A contrast to the brown rot represents the white rot in the ( also by fungi ), the lignin is recovered to a greater extent.

Types of fungi that cause brown rot, for example, the Lärchenporling ( Laricifomes officinalis ( Vill.: Fr ) KOTL et Pouzar. ), The Fichtenporling ( Fomitopsis pinicola ( Sowerby: Fr ) P. Karst.), The Schwefelporling ( Laetiporus sulphureus ) or the bitterness Saftporling ( Spongiporus stipticus (Pers.: Fr ) David). For the forest ecosystem may be a degradation of this important process. But in economic terms, the deterioration of the mechanical strength and the commercial value of the infested wood ( up to the complete devaluation! ) Is very serious by such Braunfäuleerreger.

As a cause of Braunfäuleschäden in buildings, in addition to numerous other fungal species in particular dry rot ( Serpula Lacrymans ), the Brown cellar sponge ( Coniophora puteana ) and the white pore sponge ( Antrodia vailantii or Antrodia sinuosa ) is important.