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The genuine dry rot - Serpula lacrimans - its life-basis and other wood-destructive fungi Peter Rauch -  (Automatic translation from hs024.html)

2.4. Function and description of the mycelium of Serpula lacrimans

Oberflächenmycel, Stränge

The surface-mycelium is thick, cushion-shaped and at first snow-white, later gray, from time to time easily sallow or stained also vine-reddish. Older hyphas form oxalic acid-crystals. The mycelium is to be recognized also by it that in fiber and growth-direction respectively tear. Solves well from the supporting document leaves itself. The mycelium-types are distinguished into air-mycelium, surface-mycelium, cords and Inter-mycelium. Very young mycelium lets itself hardly distinguish macroscopic from the cellar-sponge (brown wart-sponge), which is white until sallow, and no vine-ginger spots show. The cords from the dry rot is dirty-gray and up to over 10 mm thickly. Its form is roundish, band-good, limp or takes also the form of the cavity, which becomes perfoliate. (In the joint of a door-frame, the cord had thicken assumed a 1 cm quadratic form. Behind floor-crests, they flattened out something.) The cords break in the dusty order like wood of same strength. Also thin mycelium shatters. Exactly in the cellar-stonework, also roots of trees standing in the proximity or hedges are to be found. The roots differ in its dark brown one normally looks and is very flexible. As well they grow from the wall and don't have any lighter mycelium. They are visually good to distinguish from a fungus-affection. The cords with its powerful one, occasionally until 3 cm Rhizomorphen thicken the fungus can advance as far as to neighboring houses through stonework, even through the soil or under the road surface, especially its efficient water pipe-system from these long mycelium-cords it, to attack also dry building-parts and dry wood, enables. [O.Schwantes 95/S. 261-262] in marrow-trefoil-mountain became over a distance of about so. 10 m the water of the implementation of the water pipe in the cellar, where itself the mycelium and the fruit-body over increases square meters could extend. At the surface of the water pipe, condensate was predominant. The material-transportation in the cords is coupled with the conveyance by water and takes place over osmotic pressurization. Examinations with different radioactive materials support this theory. [It is Weigl and Ziegler 1960, Jennings and Bravery 1991] The function of the water-delivery of fruit-bodies and hypha-apexes clarified incomplete.

The mycelium is able to penetrate also component parts like concrete. Merely through H.-J. Rafalski was worked out the growth-directional-diagnostics the causes and damage-abolition as important characteristic. The fruit-body usually lies usually about in elliptical and round form. 10 cm however also until 2 m2 before. The fringe of the plate is usually bulge-nicely, the centimeter-wide white increase-fringe thickens especially strikingly with what is. The fruit-work period is discolored russet and fold-shaped. The fruit-body prefers diffuse light and is to be found wallcoverings about the underside of wood-grounds, at the cellar-cover or behind delivered plains, like closets, couch, so. Growing fruit-bodies smell pleasantly fungous, disintegrating after petroleum. (Also with the existence of larger volumes at mycelium, a fungus-smell is available.) The fruit-body forms rust-colored spores and is deposited in corners like dust. Older fruit-bodies until almost (black) become dark. Don't own sufficiently "growth-strength" the fungus so, the brown spores develop in a thin work period on the cotton wool-good mycelium. The bricks - until brown-red spores is ellipsoid and at a page bean-shaped leveled off and has a size of 8..12 μm times in 4,5... 8 μm.

Dampness fruit-bodies are attacked by usually white molds very fast and are coated.

However, the fruit-body of Serpula himantioides (wild dry rot) is somewhat smaller on the basis of from morphologic characteristics only heavy from the, to distinguish dry rot. The types let themselves distinguish well with genetic methods [Moreth-Kebernik und Schmidt 2000]. Predominantly, this type never comes before and with high humidity also at the timbering and after some statements at the stonework outside. Could however in Berlin (2005) under a masoned locked terrace (storage room / cellar) Myzel as well as a (exact provision only against DNA-Analysis) fruit-body is determined at the moist stonework. (The moist stonework was exposed on the outside and was sealed vertically.)

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Content
A. Biology the holzzerst.
    Fungi and insects
B. Serpula lacrimans
    (Real house-sponge)
1. Damage-picture
2. Growth factors
2.1. Humidity
2.2. Temperature
2.3. Influx light / air
2.4. Function of the mycelium
2.5. Characteristics mycelium
2.6. Cytologische processes
2.7. Spores
2.8. Environment-influxes
3. Health endangering
4. dry rot types
5. Regulation-methods
5.1. Broadly
5.2. Macroscopic
5.3. Microscopic
6. Reorganization measures
7. Damage-areas
8. remediation own-service
- Bibliographical review
- Statistics cases of damage
- Duty of notification

Books / Download

Book roof-projectile
Roof-projectile-development, molds and moist brickwork

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