Which factor plays a crucial role in the growth of wood decay fungi?

Moisture content plays a crucial role in the growth of wood decay fungi because these fungi rely on water to thrive and reproduce. The ideal moisture content for wood decay fungi is typically above 20%, which creates a suitable environment for their growth. When wood becomes damp, it provides the necessary conditions for fungal spores to germinate and begin decaying the wood.

High humidity can contribute to increased moisture content, but it is not the direct factor affecting the growth of the fungi in the same way that the moisture content of the wood itself does. Similarly, while the species of wood and low temperature might influence the extent of decay or types of fungi present, the essential driving factor behind the decay process is the moisture available within the wood. Without sufficient moisture content, wood decay fungi cannot effectively proliferate or cause damage to the structure.