Scale Insects on Palm: Identification and Treatment

Tiny black bumps on palm fronds that scrape off with a knife are likely scale insects—not a disease. They feed on sap and can weaken the plant if unchecked.

Treatment Options

1. Manual removal: Wipe each scale with a cotton swab dipped in rubbing alcohol. Repeat every 3 days for a month to catch hatchlings.
2. Systemic drench: Apply a product like Bayer Protect & Feed (imidacloprid) to the soil; the plant absorbs it and kills feeding insects for up to a year.

Prevention

• Inspect new plants thoroughly.
• Keep palms in bright light with proper watering to maintain vigor.
• Quarantine infested plants.

If the bumps don’t scrape off or you see no honeydew, send a photo for a more precise ID.