The issue
Oak wilt, caused by the native fungus, Ceratocystis fagacearum,
is one of the most serious diseases of oaks (Quercus) in the
Midwest and kills thousands of oak trees every year. The
disease causes clogged water conducting vessels, leading to wilt and
death of infected trees. Red oaks are more susceptible than white
oaks and can die within a few weeks. Spread of the disease occurs
both above and below the ground. New infection centers are created when
certain species of beetles pick up fungal spores from infected trees
and carry them to healthy trees. If these beetles land on fresh
wounds (e.g., from storms or pruning), the tree will likely become
infected. Belowground spread occurs when the fungus grows from
infected trees to healthy trees through grafted roots.
What are we doing about it?
We are conducting several studies to learn more about the
insect vectors and overland
transmission of oak wilt disease.
We are studying the
chemical treatments and belowground spread, specifically the fungicide, propiconazole,
to learn more about its ability to prevent the spread of oak wilt
disease in red oaks.
We are working to control oak wilt by
integrated disease
management strategies.
Research products
Juzwik,
Jennifer. 2000.
An oak wilt
primer
Juzwik,
J.; Cook, S.; Haugen, L.; Elwell, J. 2004. GTR-NC-240.
Oak wilt:
people and trees, a community approach to management. Version
1.3.