How can a solution for spider mite be prepared? - briefly
Mix 1‑2 % neem oil or a mild insecticidal soap with water, optionally adding a few drops of horticultural oil, and spray the solution thoroughly onto all foliage, especially the undersides. Apply early morning or late evening and repeat every 5‑7 days until mite numbers are reduced.
How can a solution for spider mite be prepared? - in detail
A practical spray for controlling spider mites can be made from readily available ingredients. The formulation combines a surfactant, an oil, and an optional insecticidal component to ensure contact, penetration, and mortality of the pest.
Ingredients
- Water – 1 liter (preferably filtered or rainwater)
- Mild liquid soap (e.g., pure castile soap) – 1–2 teaspoons (0.5–1 % v/v)
- Horticultural oil (e.g., neem, jojoba, or mineral oil) – 10 ml (1 % v/v)
- Optional: pyrethrin or spinosad concentrate – follow label‑specified rate (typically 0.5–1 ml per liter)
Preparation steps
- Fill a clean container with the measured water.
- Add the liquid soap slowly while stirring to create a uniform solution.
- Introduce the oil, continuing to mix to prevent separation.
- If an additional insecticide is desired, incorporate it according to the manufacturer’s dosage instructions and blend thoroughly.
- Transfer the mixture to a spray bottle equipped with a fine‑mist nozzle.
Application guidelines
- Test the spray on a small leaf area 24 hours before full coverage to confirm plant tolerance.
- Apply early in the morning or late afternoon, avoiding direct sunlight to reduce leaf burn.
- Cover all foliage, including the undersides where spider mites reside.
- Repeat every 5–7 days until mite populations decline, then shift to a maintenance interval of 2–3 weeks during peak season.
Safety and storage
- Wear gloves and eye protection while mixing.
- Label the container with contents and preparation date.
- Store in a cool, dark place; discard any solution that develops odor or cloudiness.
By following these precise measurements and procedural steps, growers can produce an effective, cost‑efficient spray that suppresses spider mite infestations while minimizing risk to plants and the environment.