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 Botanic Garden >> Gardening >  >> Question and Answer >> Plant Diseases

Maple Leaf Underside White Spots: Galls or Aphids

White cotton spots on maple leaf undersides; asking if tree removal needed.

Plant Diseases
Japanese Maple Honeydew and Sooty Mold: Aphid or Scale Infestation
Black Spots on Maple Leaves: Tar Spot Fungus—Rake Leaves, Reduce Inoculum, Tree Usually Fine
Tulip Tree White Spots and Sticky Leaves: Lichens, Honeydew, and Insect Control
White Spots on Maple Leaves: Cottony Cushion Scale
White Powdery Spots on Maple Leaf Undersides: Likely Insects
White Spots on Red Maple: Superficial Fungus/Algae, Not Harmful
Maple Leaf Spots and Tulip Tree Trunk Holes: Two Separate Issues
Maple Leaf Galls: Insect-Caused Bumps on Autumn Blaze Maple
White Spots on 'King Crimson' Maple: Common Leaf Fungus, Easy Management
Japanese Maple Leaf Spots: Identifying and Managing Phyllosticta
Garden Articles

Multiple Tree Decline: Red Maple, Rhododendron, Magnolia, Japanese Maples

Maple Tree Multiple Spot Syndrome: Insect, Fungus, and Algae Complex

Maple Cottony Scale Infestation: Large Tree Management Strategy

Crabapple Leaf Drop After Heavy Rain: Temperature Shock or Slugs?

Maple Leaf Galls: Harmless Insect Structures, No Human Risk

Maple Leaf Scorch from Excess Rain: No Spray Needed This Late

Maple Tar Spot and Crown Thinning: Management and Tree Vigor

Plants

Bark Peeling and Leaf Spots on Young Maple: Decay Risk and Ants

White Spots on Photinia (Red Tip) Hedge: Insect or Fungal?

Maple Trunk White Spots: Harmless Lichens

Black Spot Fungus on Mature Maple: Why Fall Cleanup Beats Spring Spraying

Late-Season Leaf Spots on Mature Maple: Cosmetic, Not Critical

Maple Leaf Spots: Phyllosticta and Tar Spot

Maple Leaf Spots: Phyllosticta—Rake Leaves, Don't Spray

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