Mealybugs on peace lily
What's Happening
Mealybugs on peace lilies present as white cottony masses in leaf axils and stems, often mistaken for mold or fungus by new plant parents. The dense foliage of peace lilies provides ideal hiding spots. Heavy infestations cause yellowing, stunted growth, and honeydew secretion leading to sooty mold. The 30-40 day lifecycle with overlapping generations requires persistent treatment.
How to Fix It
- 1
Confirm identification via close-up inspection or magnification looking for mobile crawlers
- 2
Apply topical insecticidal soap weekly to visible pests per label instructions
- 3
Administer systemic imidacloprid immediately and repeat every 7-14 days for 12-16 weeks
- 4
Isolate plant to prevent spread; prune heavily infested leaves with sterile shears
- 5
Monitor weekly with 10x loupe; maintain treatment schedule even after visible pests disappear
- 6
Reapply immediately if reinfestation occurs; peace lilies tolerate treatment well with proper care
What You'll Need
How to Prevent It
Boost humidity to 60-70% via pebble trays; ensure bright indirect light and good airflow; quarantine new plants 2-4 weeks; avoid excess nitrogen fertilizer which promotes soft growth attractive to sap-suckers; inspect weekly.