What term describes wood in all stages of fungal attack, from initial hyphal entry to complete destruction?

• A. Decay
• B. Rot
• C. Deterioration
• D. Decomposition

Answer: (A)

Decay is the term for wood undergoing fungal attack at every stage, from the first hyphae entering the tissue to the eventual structural breakdown. Fungi release enzymes that break down key wood polymers like lignin and cellulose, so the wood progressively loses strength, changes color, and crumbles as the decay advances. Different forms of decay (such as brown rot or white rot) illustrate how the same process can manifest in various ways, but the unifying idea is the ongoing biological deterioration of wood by fungi. While rot is a common everyday label for decayed wood, decay specifically describes the whole process of fungal attack, whereas deterioration and decomposition are broader concepts that don’t capture the focused progression in wood under fungal influence.