What's wrong with my plant? : Garden : University of Minnesota Extension

Willow > Trunk/Branches > Scattered dead branches in canopy

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Leaves on random branches wilt, turn yellow then brown
Random dead branches seen throughout the canopy
Sunken irregulary-elongated cankers with cracked bark at the edges occur on branches or the main trunk
On thick barked trees, cankers may not be visible
In wet weather curled tendrils of orange spores emerge from pimple-like fungal structures within infected branches
Common on trees stressed by drought, winter injury, wounds, insect feeding or other factors
More information on canker

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Dead branches within the canopy
Yellowing to brown leaves may be present
Groups or rows of small (
Schizophyllum shelf fungi are white and appear fuzzy on top
Cerrena fungi are white to greenish grey and have concentric rings on the surface
Trametes shelf fungi are tan to brown with darker rings
Wood below fungal shelves is yellowish to white, spongy, crumbly and decayed
Bark around fungal shelves is killed and often falls off
Common on trees stressed by drought, winter injury, wounds, mechanical injury or other factors
More information on Heart rot

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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