Sumac > Stems/branches > Dead branches or branch or shoot dieback
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- Light to moderate infestations show little or no symptoms
- Severe infestations can cause chlorotic, stunted foliage
- Dieback and cracked bark can result from heavy infestations
- Light to dark brown, elongated, 1/10 to 1/8 inch long oyster-shell shaped scales found on bark
- More information on oystershell scale...
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- Leaves on one to several branches turn red to yellow, wilt, die and fall off
- Dark olive to gray streaks are often visible in the sapwood if the bark is peeled back
- Symptoms often seen in one to a few branches but may spread to the entire canopy
- Symptoms are often most obvious in late summer and autumn but can occur throughout the growing season
- More information on verticillium wilt...
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- 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...