Principle species colonised

Mostly English oak, Pedunculate and Sessile.

Area affected

Roots; Its possible to extend above ground level.

Type of decay

Dry and hard at first, the decay eventually turns into a usually moist white rot that frequently has black zone lines visible.

Fruit body / fungal structures

With the exception of midwinter, toadstools form all year long and continue to exist after death.

Significance / Effect / Impact

Although there is no proof that the decay can result in tree failure, it does somewhat impair the vitality of the roots, causing crown symptoms to become apparent.