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Viburnum > Leaves > Leaves brown to black and wilted
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Botryosphaeria canker
Botryosphaeria dothidea
- Leaves on one or more branches wilt, die and turn brown
- Cankers are sunken, dark colored areas on branches
- Fungal fruiting bodies give canker area a rough or pimpled appearance
- Infected young shoots turn dark brown and curl over in a shepherd's crook
- More information on Botryosphaeria canker
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Verticillium wilt
Verticillium dahliae
- Leaves on one to several branches turn red to yellow, wilt, die and fall off
- Depending on the stage of infection, dark streaks are often visible in sapwood if the bark is peeled back
- Symptoms may develop over a single growing season or over several years
- More information on Verticillium wilt
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Armillaria Root Rot
Armillaria spp.
- Leaves may be small, pale green to yellow with dark green veins
- When severe, leaf edges turn brown leaves wilt and the branch dies
- No symptoms on branches
- Flat white sheets of fungal mycelia can be seen under the bark on roots or at the base of the plant
- Clusters of honey-colored mushrooms may grow at the base of the shrub in the fall
- More information on Armillaria root rot
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Bacterial leaf spot (bacterial blight)
Pseudomonas syringae pv viburni
- Dark brown to black angular blotches on leaves
- Blotches may grow together resulting in large irregular black areas on leaves
- Shiny bacterial ooze may be visible on leaf surface
- Dark colored blotches may occur on young shoots
- Severe cases may result in shoot death and branch dieback
- More information on Bacterial leaf spot (bacterial blight)
