Extension > Garden > Diagnose a problem > What's wrong with my plant? > Deciduous > Catalpa > Fungi growing on trunk or branches
Catalpa > Trunk/branches > Fungi growing on trunk or branches
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Sapwood rot
Schizophyllum commune
- Dead branches within the canopy
- Yellowing to brown leaves may be present
- Groups or rows of small (< 2 inches wide) semi-circle shelf fungi along killed branches or on the main trunk, often near cracks or wounds
- Schizophyllum shelf fungi are white and appear fuzzy on top
- Wood below fungal shelves is yellowish to white, spongy, crumbly and decayed
- Bark around fungal shelves dies and often falls off
- Common on trees stressed by drought, winter injury, wounds, mechanical injury or other factors
- More information on Sapwood rot
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Armillaria root rot
Armillaria spp.
- Infected trees have poor growth, dead branches in the upper canopy, undersized and/or yellow leaves
- Flat white sheets of fungal growth (mycelial fans) between the bark and sapwood at the base of infected trees
- Thick black, shoestring-like fungus can sometimes be seen under the bark, around roots and in the soil around the base of the tree
- Wood is decayed, white, soft and spongy; this may extend from the base of the tree well up into the trunk
- Trees frequently break or fall over in storms
- Clusters of honey-colored mushrooms may grow at the base of the tree in fall
- More information on Armillaria root rot
