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The genuine dry rot - Serpula lacrimans - its life-basis and other wood-destructive fungi Peter Rauch -  (Automatic translation from hs027.html)

2.7. Spores

The spores are ellipsoid as well as at the pages bean-shaped leveled off and has a tile - until brown-red as well as in the age a very dark color. The measurement is with 9..12 μm x in 4,5.. 8 μm.

Spores from the dry rot

If optimal life-conditions find the spore, so these germinate and form young mycelium. In the literature, there are relatively few statements to the fungus-spores. Often, spores and the mycelium, particularly with the fight, are represented in a context. However, there are appreciable differences, that are interconnected already with the respective biological task. Spores have the task opposite the mycelium to spread the fungus about bigger distance. Spores must "harden" therefore much climatic conditions survives, just like it in the free nature is available. Spores are more resistant than vegetative cells opposite heat-impact and toxic chemicals.
"Laboratory-examinations show that the ubiquitous spores to germinating require a wood-humidity of 30 - 40 per cent. Hyphas to (further -) growing however only one wood-humidity of 17 - 20 per cent, so the risk of a re-affection clearly is higher." (T. Huckfeldt) A wood-humidity of 30 per cent and bigger corresponds a relative humidity of about. 100 per cent and 17-20 per cent of a relative humidity between 80-90 per cent. In a normally used building, this humidity doesn't occur, except on a muggy-warm summer-day.
Spores are formed by the fruit-bodies. If there are not any fruit-bodies, so no "additional" spore-encumbrance is available. There are spores everywhere, however in essentially more inferior concentration. No fruit-body therefore must be available in order to make a new affection possible. However, each spore doesn't germinate. The higher the concentration is at spores, also the likelihood of a growth is so bigger if optimal life-conditions are available. Spores spread through air-movement and the transportation of objects where they set aside themselves as spore-dust, from. Microorganisms and mold-spores stick also to dust for itself. In like wide this also for the spores of the dry rot applies, cannot be answered. However, it is quite possible that a high dust-encumbrance favors a spread. The life span of fungus-spores is dependent on the temperature, the air-speed and the sun-no-radiation in the free air. Colourless spores are destroyed by the ultraviolet radiation quickly. Therefore dominates pigmented spores, to what also the dry rot-spores belong.
In the practice, one can determine, if a medium dry rot-affection is available in a building and also small fruit-bodies exist, so one finds faster local damages also on other floors if the corresponding life-conditions are available. The same is applicable also to residential areas where a higher damage-affection is intently detectable and optimal life-conditions are available at the respective object.

With every fight, the cause is to be removed in principle. If the moist stonework is or respectively the wood dry, so also no spore can germinate. Fruit-bodies should take away especially carefully without draft and of are disposed. The spore-distribution is to be avoided in principle. Analogously this is applicable also to areas where spores were deposited. Objects, for example washing machine, refrigerator, tools etc. is to be cleaned thoroughly and doesn't need is detoxified, since they don't form any food-basis from the matter.
Merely only one statement of Mr. Dr things is. Achim Unger 1996 (Quedlinburg) Zur fights of the spores before. In order to fight the spores effectively, a temperature of 100°C over 4 h must at the surface. or 80°C over 6 h. is abandoned. (compare Pkt. 2.2.). (If biotechnical primordia are sterilized, the temperatures lie with 125-140°C per law cases, however with essentially shorter time.) A thorough being burned down of the damage-areas with the essentially hotter gas-flame should destroy a deep slice of the spores.

Spore-end-germination with pillar-fungus

Most pillar-fungi possess a generation-change. A haploid generation develops from the fungus-spores. After the amalgamation of the sex-cells, a two-seedy generation joins, that continues to exist with the cell-amalgamation (P). Only in the spore forming cell, the kernel-amalgamation (K) takes place. It follows on it the reduction division (M = meiosis) and the Abgliederung of the haploid basidiospores. The two-seedy hyphas with the pillar-fungi are independent in the nutrition and can grow further for years and can train fruit-bodies again. [Beautifully] It, to assume it, is, that these conditions are dry rot applicable also to it.

There are examinations, that are represented in an Isoplethensysteme, to the growth-conditions of the mold-spores. Between the individual fungus-species, significant differences emerge. Even if the examinations don't involve the spores of the dry rot, this system should be introduced here since important criterions can be derived.
The essential growth-preconditions are the temperature, the relative dampness and the substrate, which must be available over a certain time-period. In the Isoplethensystem, the spore-end-germination of the molds is represented. Here, however, the influx of substrates (construction-materials and contamination) becomes and other constraints doesn't consider. It should also be considered only model here so that the connections become clear.

Picture: Isoplethensystems for spore-end-germination of the molds (Aspergillus restrictus (left)) and Aspergillus versicolor (right). The non-stationary constraints are not taken into account. /35/

Isoplethensystemes for spore-end-germination of the molds

Here, it becomes following clear. A germinating the spores without fail immediately doesn't need to be performed also during a high relative humidity of 90 to 95 per cent if the temperature is low. However, a fungus-formation can come already after few days with an essentially higher surface temperature, for example 15 to 18 °C, and with lower relative humidity of 75 to 80 per cent at the same wall-construction-material (the wall-construction-materials, for example wood, stand in a dampness-adjustment by the surrounding ambient air). Approximately analogue conditions are applicable to the spores of the pillar-fungi. In the practice, this becomes clear also with damages through management-water or land on water with a fire-fighting, for example. Although the wood-great commissure-covers come it taciturn to the myceliumbildung of mold - and wood-destructive fungi, if these areas are not dried early sufficiently. Growth-differences of young mycelium at cooler and warmer component parts show themselves well whatever becomes clear with the seasons, sees under Pkt here further. 2.2.). Proficiency in the winter quite the wetness-damages is available (what should not be) without visible myceliumbefall several weeks, so rich in the summer sometimes few days and the first mycelium is visible. In the practice, this can appear on an unclean (with organic elements) cellar-floor, for example, if condensation refines.(Condensation refines if warmer air is aired in, but the massive component parts another lower temperature shows.) The mycelium is round, white, very thinly and is enough from about. 1 cm until palm-size, a small dark little dot is in the middle.

Fungus-spores decree a certain osmotic potential, with whose help water can be picked up from the surroundings, available material because of it in it. If a certain water-volume can regulate in stock in the spore-internal, that admits the start of the metabolism, the fungus its metabolism independently from extrinsic conditions and with the growth begins. It should still be called complementary here that one developed the above named system with the molds and it represents temperature-dependent in the generalized Isoplethensysteme deepest relative dampness for the spore-end-germination so. (Further implementations of Sedlbauer and Krus.)

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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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