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Oak Trees and Fungus

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Oak Trees and Fungus

Oak Trees and Fungus. Oaks are prone to developing a wide array of fungal infections. One of the most common types of fungal disease is oak wilt, which affects all types of oak trees.

Oaks are prone to developing a wide array of fungal infections. One of the most common types of fungal disease is oak wilt, which affects all types of oak trees.
Oak Wilt
Oak wilt, a form of fungal infection, can be fatal to the oak tree. It causes leaves to drop and infects the tree bark.
Origin
Oak wilt was first identified as a major problem in Wisconsin in 1944. It has been seen in nearly half of the United States and is especially common in the Midwest.
Symptoms
Fungus infects the leaves first, causing them to wilt, turn brown, and drop. Red oaks may develop fungal mats under the bark, while white oaks have discolored annual rings.
Spreading
The oak wilt fungus is typically spread from diseased trees to healthy trees through natural root grafts. Sap and bark eating beetles also spread fungus from tree to tree.
Prevention/Solution
Oak wilt cannot be cured in infected trees. Remove diseased trees and place mechanical or chemical barriers between diseased and healthy trees to prevent the spread of oak wilt.

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