Armillaria root rot
- Clusters of honey-colored mushrooms may grow at the base of the tree in fall
- Wood is decayed, white, soft and spongy, and this may extend from the base of the tree well up into the trunk
- Thick black, shoestring-like fungus can sometimes be seen under the bark, around roots and in the soil around the base of the tree
- Infected trees have poor growth, dead branches in the upper canopy, undersized and/or yellow leaves
- Flat white sheets of fungal growth (mycelia fans) grow between the bark and sapwood at the base of infected trees
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