Extension > Garden > Diagnose a problem > What's wrong with my plant? > Deciduous > Mockorange > Spots or blotches on leaves
Mockorange > Leaves > Spots or blotches on leaves
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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
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Botrytis blight
Botrytis cinerea
- Flower buds, petals, or entire blossoms turn tan to gray
- Flowers become covered with fuzzy gray colored fungal spores in wet weather
- Brown, round to irregular spots on leaves, often where petals have fallen
- Common during cool wet weather
- More information on Botrytis blight
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Powdery mildew
Erisyphe polygoni
- White spots or blotches on leaves
- In severe cases leaves and young shoots may be completely covered with white powdery fungal growth
- Leaves may be stunted, curled or puckered
- Red or purple blotches may occur on upper leaf surfaces
- More information on powdery mildew
