If black spots are slightly raised and leaves feel sticky → scale insects. They suck sap, excrete honeydew (sticky), and appear as tiny translucent bumps that harden into brown shells.
Email a photo to wcreed@HorticulturalHelp.com with details:
Thoroughly drench all surfaces with horticultural oil, neem oil, or alcohol-soap spray (1:8 alcohol:water + drop of soap). Repeat in 5–7 days. Check weekly.
Cymbidium Leaf Spots: Fungal Diagnosis, Copper Fungicide Treatment & Prevention
Identifying and Treating Rose Rust
Diagnosing Yellow Spots on Rose Leaves: Virus vs. Fungus
Birch Leafminer on River Birch: Identification and Systemic Treatment
Nepenthes Shipping Damage: Leaf Scars, Not Pests
Rubber Tree Losing Leaves in Hallway: Light Deficiency
Dwarf Banana Black Spots: City Water Chemicals and Overwatering
Black Leaf Spots on Corkscrew Willow: Late-Season Fungal Spots and Prevention
Black Spots on Maple Leaves: Tar Spot Fungus—Rake Leaves, Reduce Inoculum, Tree Usually Fine
Weeping Mulberry Leaf Spot: Fungus Overwinters on Fallen Leaves—Rake, Fungicide, Check Neighbors
Black Spot Fungus on Plumeria: Trim, Sanitize, and Spray
Sunset Maple Decline: Premature Color, Leaf Spots, and Trunk Issues
American Holly Yellowing and Black Spots: Fungal Disease Management
Black-Eyed Susan Leaf Spots: Fungal Diseases, Cultural Control
Copyright © www.100flowers.win Botanic Garden All Rights Reserved