How to treat a Phalaenopsis orchid for mites? - briefly
Treat the orchid by spraying its leaves and stems with a diluted insecticidal soap or neem oil solution, ensuring thorough coverage of the undersides, and repeat the application every 5–7 days until mites are eradicated. Isolate the plant and maintain low humidity to discourage further infestations.
How to treat a Phalaenopsis orchid for mites? - in detail
Mite infestations on Phalaenopsis orchids require prompt, systematic action. Begin with accurate diagnosis: examine leaves, roots, and buds under a magnifying lens for tiny, moving specks and fine webbing. Confirm presence before treatment.
Isolate the affected plant to prevent spread to nearby specimens. Place the orchid in a separate, well‑ventilated area and avoid direct sunlight that could stress the foliage.
Implement cultural measures first. Increase air circulation by using a small fan on low speed, and reduce humidity slightly for 24–48 hours to create an unfavorable environment for mites. Trim heavily infested leaves or roots with sterilized scissors, disposing of cut material in sealed bags.
Apply targeted control agents:
- Insecticidal soap – dilute according to label, spray thoroughly on all surfaces, repeat every five days for three applications.
- Horticultural oil – use a neem‑based or mineral oil formulation, coat leaves and roots, repeat after two weeks.
- Systemic miticide – select a product approved for orchids, follow dosage instructions precisely, monitor for phytotoxic symptoms.
For biological control, introduce predatory mites such as Neoseiulus cucumeris or Amblyseius swirskii. Release a small colony onto the plant, maintain humidity above 50 % to support predator activity, and inspect weekly.
After treatment, return the orchid to its regular growing conditions. Maintain weekly inspections for at least two months, adjusting watering and fertilization to avoid excess foliage softness that attracts pests. Record any recurrence and modify the control regimen accordingly.