Sesame-Seed-Like Objects on Peace Lily: Scale Insects or Fertilizer Residue?

Small, sesame-seed-shaped objects on peace lily stalks and leaves are likely scale insects—not fertilizer spikes. Scale appear as immobile, oval bumps (tan to brown) that suck sap and excrete honeydew.

How to Confirm

• Try scraping one off with a fingernail. Scale will lift as a tiny shell.
• Look for sticky residue (honeydew) on leaves or nearby surfaces.
• Check leaf undersides and stem crotches for crawlers (tiny mobile juveniles).

Treatment

1. Remove adults with a soft brush and soapy water.
2. Dab crawlers with 70% isopropyl alcohol on a cotton swab.
3. Apply systemic insecticide (e.g., imidacloprid) as soil drench for long-term control.

Fertilizer Spikes Are Not the Cause

They don’t attract pests. Focus on the scale infestation.