Mealybugs on hoya
What's Happening
Mealybugs (Pseudococcidae) infest Hoyas through introduction via new plants, outdoor exposure, or spread from infected plants. Their waxy exoskeletons and egg-filled ovisacs resist common treatments like soaps and Malathion. Hoya dense, waxy foliage and leaf axils provide ideal hiding spots for crawlers and adults. The 10-14 day life cycle means eggs hatch after initial treatment, causing reinfestation if not addressed comprehensively.
How to Fix It
- 1
Isolate infected Hoya immediately to prevent spread to other plants
- 2
Apply 70% isopropyl alcohol directly to visible mealybugs and ovisacs using a cotton swab or spray�alcohol dissolves the waxy coating on contact
- 3
Treat the soil with systemic granules (imidacloprid) or diatomaceous earth to target soil-dwelling eggs and crawlers often missed by foliar sprays
- 4
Repeat full treatment every 7 days for 3-4 weeks to break the life cycle
- 5
Follow up with insecticidal soap or Captain Jack Deadbug Brew (spinosad-based) for residual protection
- 6
Inspect daily with magnification, especially in leaf axils and under leaves where Hoya growth pattern hides pests
What You'll Need
How to Prevent It
Quarantine all new plants for 2-4 weeks with weekly inspections before introducing to your collection. Maintain 50-70% humidity and bright indirect light to keep Hoyas stress-free and less vulnerable. Avoid moving plants outdoors without hardening off. Consider monthly preventive neem oil sprays during high-risk seasons.