03/25/2021
Taking care of the trees:
Prune Your Oak Trees Before April 15
"Landowners throughout Michigan are being reminded to prune or complete any work around any red oak trees before April 15 in order to help stop the spread of oak wilt. Oak wilt is a non-native fungus that is 100% fatal to red oaks and can be controlled if recommended practices are followed. Any planned construction or utility work that requires removal or pruning of oaks, a timber harvest, or any activity that is likely to wound oaks, should all be completed before the growing season begins. If tree work is completed now, the tree wounds will seal off before the picnic beetles are active. These sap feeding beetles are the primary vectors transmitting the fungal spores overland.
Oak wilt is one of the most expensive diseases to treat so prevention is key. Avoiding new infections is the least costly of all the management options available. Tree professionals strongly recommend not pruning or injuring red oak trees when the trees are actively growing and the beetles are active, so between April 15 and October 31 is a guideline that will lower the risk of overland spread by the sap feeding beetles. Pests and diseases do not recognize dates on our calendar so waiting until temperatures are consistently cold and they go dormant is the time of lowest risk. If a tree receives storm damage or for hazard reasons, needs to be pruned during the growing season, immediately seal the wound with tree wound or latex paint.
New satellite oak wilt sites occurred last summer in the Glen Arbor and Benzonia areas, while Grand Traverse County continues to have more new oak wilt sites confirmed than any other county in the state. Landowners are encouraged to share the preventative information with neighbors so that together, we can keep the spread of this fatal fungus under control. Please visit the Michigan Oak Wilt Coalition website for up-to-date information, https://www.michiganoakwilt.org/.
The Forestry Assistance Program for Leelanau, Benzie, and Grand Traverse Counties offers free, on-site technical assistance to help landowners correctly identify wilt, and learn about treatment options. For more information, contact K**a Ross, District Forester, 231-256-9783 or [email protected]. "
Oak wilt is a fungal disease that affects oak trees. As the name implies, oak wilt causes leaves of affected trees to wilt and turn brown. It is fatal for red oaks, including northern red oak, pin oak, scarlet oak and black oak. White oaks are affected but may survive. The incidence of oak wilt ...