How does Oak Wilt occur?
The oak wilt fungus moves from tree to tree in two ways: underground through the roots or overland by insect vectors. Local Spread of Oak Wilt: Most new tree infections occur as a result of the fungus moving from an infected tree to a nearby healthy tree through connected root systems. The roots of trees in each oak group commonly graft to roots of other trees in the same group, forming a continuous underground network.
