Help prevent the spread of oak wilt: Avoid pruning or wounding oak trees between April 15 and July 15
Oak trees have a reputation for being mighty, but these majestic trees need our help in spring and early summer to prevent the spread of a microscopic killer.
From April 15 to July 15, oak trees are at high risk for oak wilt, a serious fungal disease that can weaken white oaks and kill red oak trees within weeks of infection. During this time of year, flying beetles can carry oak wilt fungus spores from tree to tree and the fungus can infect trees through wounds left by pruning or storm damage.
“The guidelines against pruning oak trees during this time can help prevent the spread of the disease,” said James Wieferich, forest health specialist in the DNR’s Forest Resources Division.
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