White oaks tend to be resistant. Leaves at the top of the tree turn brown along the tips and margins, wilt, and soon begin to fall while there is still some green color left in them. This progresses down the tree. Twigs and branches die. Brown streaks often observed in the outer sapwood is sometimes difficult to find.
Trees usually die within one year after infection.
Ceratocystis fagacearum Remove infected trees and soon as the diagnosis is made. Do not stack the wood since insects in it may leave and carry the fungus to neighboring trees. Propiconazole injection can protect trees.