Extension > Garden > Diagnose a problem > What's wrong with my plant? > Deciduous > Magnolia > Spots on leaves
Magnolia > Leaves > Spots on leaves
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Powdery mildew
Phyllactinia guttata
- White-gray, felt-like spots or patches on leaves
- Infected leaves may curl, twist or fold upwards
- Lower shaded leaves and small understory trees are most commonly affected
- More information on Powdery mildew
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Sooty mold
- Black, brown or gray soot-like covering on leaf surfaces, twigs or branches
- Sticky, shiny secretions on leaves from sap-sucking insects (scale insects, aphids, leaf hoppers, psyllids, etc.)
- Insects or signs of insect damage (distorted, pin-prick feeding marks, etc.) may be seen on leaves or twigs above the worst affected moldy areas.
- More information on Sooty mold
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Botrytis blight
Botrytis cinerea
- Irregular shaped, brown, water soaked spots on flower petals
- Round, brown leaf spots, dark brown concentric rings can often be seen within leaf spots
- Fuzzy brown to gray mold on old spots and dead plant tissues
- More information on Botrytis blight
