What should be done if spider mites appear on indoor flowers? - briefly
Isolate the infested plant, raise ambient humidity, and apply a miticide or insecticidal soap directly to the leaves. Repeat treatment every 5‑7 days and clean surrounding foliage to prevent reinfestation.
What should be done if spider mites appear on indoor flowers? - in detail
Spider mites rapidly colonize indoor ornamental plants, causing stippling, yellowing, and webbing on leaves. Immediate action prevents extensive damage and limits spread to neighboring specimens.
Identify infestation by inspecting the undersides of foliage. Look for tiny moving specks and fine silk threads. Confirm presence before treatment to avoid unnecessary interventions.
Isolate the affected plant. Relocate it to a separate area, preferably away from other potted specimens, and cover surrounding surfaces with plastic to contain falling debris.
Mechanical removal:
- Rinse the plant with a strong jet of lukewarm water, directing flow onto the leaf undersides.
- Wipe each leaf with a soft cloth or cotton swab dampened with soapy water (mild dish detergent diluted 1 %).
- Repeat the washing process every 2–3 days for two weeks, monitoring mite counts.
Chemical control:
- Apply a horticultural oil (e.g., neem oil, mineral oil) at the label‑recommended concentration, ensuring thorough coverage of leaf surfaces and stems.
- Use a miticide formulated for indoor use, such as a spinosad‑based product, following safety instructions and re‑applying after 7 days if mites persist.
- Avoid products containing high‑risk residues that may harm humans or pets in confined spaces.
Biological control:
- Introduce predatory mites (Phytoseiulus persimilis, Neoseiulus californicus) to the plant’s environment. Release rates depend on infestation severity; typical recommendations range from 10–20 predators per square inch of foliage.
- Maintain humidity above 60 % and temperature between 20–25 °C to support predator activity.
Environmental adjustments:
- Increase ambient humidity by misting or using a humidifier; spider mites thrive in dry conditions.
- Raise airflow with a low‑speed fan, avoiding direct drafts that may desiccate leaves.
- Ensure adequate lighting without excessive heat, as stressed plants become more susceptible.
Preventive measures:
- Quarantine new acquisitions for at least two weeks, inspecting them before integration.
- Clean potting media periodically and sterilize tools with alcohol or bleach solution.
- Rotate crops and avoid overcrowding to reduce microclimates favorable to mite development.
Follow‑up monitoring for four weeks after treatment confirms eradication. If re‑infestation occurs, repeat mechanical and biological steps before resorting to additional chemical applications.