Schefflera Scale Infestation: Honeydew, Sticky Spots, and Natural Control

15-Year-Old Schefflera with Sticky White Spots: Scale Insects

A long-lived schefflera (Schefflera arboricola) with progressive white, fuzzy, sticky spots and "kills nearby plants" has scale insects (mealybugs or soft scale)—not fungus.

Why It's Insects, Not Fungus

• Fungi don't produce sticky honeydew.
• Scale/mealybugs feed on sap → excrete honeydew (sticky).
• "White, fuzzy" = mealybugs (soft scale variant).
• Nearby plants die from honeydew → sooty mold → photosynthetic blockage, or crawler spread.

Identification & Natural Treatment

1. Inspect with magnifier: Undersides, stems, leaf axils. Mealybugs = cottony. Soft scale = brown bumps.
2. Water blast: Dislodge crawlers and honeydew.
3. Alcohol swabs: Touch mealybugs with 70% isopropyl on cotton swab.
4. Insecticidal soap or horticultural oil: Spray thoroughly (especially undersides). Repeat weekly × 3–4×.
5. Homemade recipes (TEST FIRST): Oil/soap mixes. Recipes here
6. Systemic option: Imidacloprid soil drench (Bayer) for persistent crown infestations.

Protecting Other Plants

• Isolate schefflera during treatment.
• Clean honeydew off nearby plants (soap water wash).
• Monitor all plants for crawler spread.

15 years is impressive for a houseplant! Scale is treatable—your schefflera can recover fully.