Thick black powder on upper leaf surfaces (washes off with effort) = sooty mold on honeydew from scale/aphids.
Don’t scrub every leaf; treat the source.
Black Bark on Ornamental Pear: Possible Fungal Canker
Cherry Tree Black Canker: Professional Diagnosis Needed
Fir Tree Infestation: Aphids/Scale, Sooty Mold, and Systemic Treatment
Black Mold on Young Tree: Aphids and Sooty Mold Fix
Black Sticky Residue on Patio: Sooty Mold from Aphids or Scale
Mango Tree from Seed: Rootstock Suckers & Fruiting Reality
Mango Tree vs. Timber Bamboo: Tropical Garden Giants Compared
Indian Bean Tree (Catalpa) Black Fall Leaves: Sooty Mold from Insects
Tree with Black Scarring and Hollow Branches: Hypoxylon Canker
Black Spots on Japanese Maple Bark: Likely Harmless Lichens
Black Spots on Maple Leaves: Tar Spot Fungus—Rake Leaves, Reduce Inoculum, Tree Usually Fine
Black Lines in Lightning-Struck Maple Wood: Lightning Trace Scars—Fascinating Wood Feature
Aphids or Scale Causing Black Sooty Mold on Oak
California Black Oak: Majestic Native Tree for Wildlife and Timber
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