Mealybug Infestation on 8 Orchids: Alcohol, Systemics, and Vigilance

Identification Confirmed

Gold-colored bits on cotton swab = mealybugs (cottony cover, turn yellow-brown in alcohol). On all leaves and blooms of 8 plants (yellow/purple flowers).

Three-Stage Treatment

1. Manual removal: Q-tip soaked in rubbing alcohol—wipe every visible bug. Turns yellow-brown when dead.
2. Systemic insecticide spray: Apply outdoors in shade. Use Merit or Bayer Advanced Garden (absorbed into tissue, kills suckers for 30 days). Local garden center has alternatives.
3. Follow-up: Recheck weekly. Remove adults with alcohol. Respray monthly until pest-free 2 months. Eggs/young in mix hatch later.

Critical Notes

• Treat all 8 plants simultaneously.
• Isolate from other plants.
• Check leaf undersides, crown, roots.
• Don't spray in enclosed spaces—ventilate.

Mealybugs reproduce fast—persistence wins.