Dry rot is a serious disease of wood. It is caused by a fungus and causes wood to decay. The house was riddled with dry rot. a disease in wood that turns it into powder. Symptom of fungal disease in plants (see fungus), characterized by firm spongy to leathery or hard decay of the stem (branch), trunk, root, rhizome, corm, bulb, or fruit. The fungus consumes the cellulose of wood, leaving a soft skeleton that is readily reduced to powder
a fungus causing dry rot a crumbling and drying of timber or bulbs or potatoes or fruit caused by a fungus