Eradicating Mealybugs on a Mature Wax Plant (Hoya)

Mealybugs on a 10–12 year old Hoya require extremely thorough spraying. The pests hide in leaf axils, stem crevices, and under leaf edges.

Effective Spray Formula

Mix 5 parts water : 1 part isopropyl alcohol : 1 squirt liquid soap in a spray bottle.

Application

1. Spray every surface until dripping wet—tops, undersides, stems, leaf axils, growing tips.
2. Work methodically; missing a few juveniles guarantees reinfestation.
3. Repeat weekly for 3–4 weeks.

Cultural Care to Prevent Recurrence

• Keep Hoya tightly potted.
• Provide bright light (east/south window).
• Let soil dry deeply between waterings.
• Fertilize sparingly.

For a plant pest guide, email wcreed@HorticulturalHelp.com.