Mealybugs on Orchids: Immediate Treatment Without Repotting

A reader discovered mealybugs on their blooming orchid and asks whether to repot or treat in place, noting the common advice to wait until flowers fall before repotting.

Immediate Action: Manual Removal and Spot Treatment

Since the plant has 15 flowers, avoid repotting now. Instead:

• Remove visible mealybugs with a cotton swab dipped in isopropyl alcohol
• For larger infestations, use insecticidal soap spray
• Repeat every few days as eggs hatch and bugs emerge from hiding spots

Systemic Option: Disyston Granules

Sprinkle Disyston systemic granules on the potting mix surface. They work into plant tissues over 2-3 weeks, killing feeding insects. Note: granules emit a strong chemical odor for the first couple of weeks.

Vigilance Is Key

Continue monitoring and treating every few days until no signs remain. Mealybugs are persistent, but consistent treatment wins.