Extension > Garden > Diagnose a problem > What's wrong with my plant? > Deciduous Trees > Forsythia > Leaves discolored brown to black and wilted
Forsythia > Stems/branches > Leaves discolored brown to black and wilted
1 of 3
Botryosphaeria Canker
Botryosphaeria dothidea
- Leaves on one or more branches wilt, turn brown and die
- Bark on infected branches is darker, cracked, or blistered at the site of the canker
- Wood beneath the canker is dark brown
- Common on shrubs stressed by drought, winter injury and other factors
- More information on Botryosphaeria Canker
2 of 3
Bacterial blight
Pseudomonas syringae pv syringae
- Brown spots with yellowish haloes on leaves
- Spots may enlarge or grow together causing the leaves to turn black and die
- Young shoots and stems may be black and wilted
- Flowers and flower buds turn black and wilt
- More information on bacterial blight
3 of 3
Twig blight
Sclerotinia sclerotiorum
- Leaves and twigs on one or more branches die suddenly
- Common on branches found near the ground
- White, fuzzy fungal growth may be seen on infected branches
- Hard black bodies (sclerotia) are found on the inside of infected twigs when split open
- Most common in nursery settings under cool, wet conditions
- More information on Twig blight
