What should I do if I find a spider mite? - briefly
Isolate the infested plant and rinse its leaves with a strong jet of water to remove the mites. Then treat with a suitable miticide or introduce predatory mites to eliminate the remaining population.
What should I do if I find a spider mite? - in detail
If a spider mite appears on a plant, act immediately to limit damage.
First, confirm the infestation. Look for tiny, moving specks on the undersides of leaves, fine webbing, and stippled or yellowed foliage. Use a magnifying glass if necessary.
Next, isolate the affected specimen. Place it away from other plants, preferably in a separate room or under a clear cover, to prevent the mites from spreading.
Then, choose a control method:
- Physical removal: Spray the plant with a strong jet of water, focusing on the leaf undersides. Repeat every two days until no mites are observed.
- Chemical control: Apply a miticide labeled for spider mite management. Follow label directions precisely, covering all leaf surfaces. Rotate products with different active ingredients to avoid resistance.
- Biological control: Introduce predatory insects such as Phytoseiulus persimilis or Neoseiulus californicus. Release the predators according to package instructions and maintain humidity levels that favor their activity.
- Cultural measures: Increase ambient humidity to 60‑70 % by misting or using a humidifier. Reduce leaf temperature and ensure adequate ventilation to discourage mite reproduction.
After treatment, monitor the plant daily for at least two weeks. Inspect both the treated specimen and neighboring plants for any signs of resurgence. If mites reappear, repeat the chosen control method or combine physical and biological tactics.
Finally, implement preventive practices: keep foliage clean, avoid excessive fertilizer that promotes rapid growth, and quarantine new plants before introducing them to the collection. Consistent observation and prompt response will keep spider mite populations from establishing a foothold.