What should be done if a plant has spider mites? - briefly
If a plant is infested with spider mites, isolate it, wash foliage with a strong jet of water, and apply insecticidal soap or a horticultural oil according to label directions. Follow with regular monitoring and maintain higher humidity to discourage further outbreaks.
What should be done if a plant has spider mites? - in detail
Spider mite infestations require immediate action to prevent rapid population growth and leaf damage.
First, confirm the presence of mites by inspecting the undersides of leaves for tiny moving specks and fine webbing. Use a magnifying lens if necessary.
Next, isolate the affected specimen from other plants to stop spread.
Physical removal:
- Rinse the plant with a strong jet of water, focusing on leaf undersides, to dislodge mites and webs.
- Wipe each leaf with a soft cloth dampened with soapy water to remove residual insects.
Chemical and biological controls:
- Apply horticultural oil (e.g., neem or mineral oil) at a concentration of 1–2 % after thorough washing; repeat every 5–7 days until no mites are seen.
- Use insecticidal soap (2–5 % solution) following label directions; ensure full coverage of foliage, especially the lower surfaces.
- For severe cases, consider a miticide containing abamectin or spirodiclofen; rotate active ingredients to avoid resistance.
Environmental adjustments:
- Raise humidity to 60 % or higher, as dry conditions favor mite reproduction. Use a humidifier or misting schedule.
- Maintain temperatures between 65–75 °F; extreme heat can suppress populations but may stress the plant.
- Ensure adequate air circulation to reduce leaf moisture buildup that could encourage secondary fungal problems.
Preventive measures:
- Inspect new acquisitions before introduction.
- Clean pots, trays, and tools regularly with alcohol or bleach solution.
- Monitor plants weekly during warm months, repeating the water‑spray method as a routine prophylactic step.
By combining immediate mechanical removal, targeted oil or soap applications, and environmental management, the infestation can be eliminated and future outbreaks minimized.