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How to Manage Pests

Pests in Gardens and Landscapes

Pest identification and confirmation—Oak root fungus

To confirm the presence of Armillaria, look for thin white leathery patches of fungus by carefully peeling the bark away from the trunk just below the soil line; if the fungus has not girdled the tree, check several areas. The fungus has a characteristic fresh mushroom odor and occasionally after a heavy rain in fall it may form clusters of mushrooms at the base of infected trees.

Peel off bark to check for oak root fungus
Peel off bark to check for oak root fungus

Close up reveals white leathery patches
Close up reveals white leathery patches

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