How to dilute cypermethrin to combat ground fleas? - briefly
Mix 0.1 % cypermethrin solution by adding 1 ml of 10 % EC concentrate to 990 ml water, apply evenly to the affected ground, and repeat after 7 days. Ensure thorough wetting, prevent runoff, and wear appropriate protective equipment.
How to dilute cypermethrin to combat ground fleas? - in detail
Cypermethrin is a synthetic pyrethroid used against ground‑dwelling fleas. Effective treatment depends on preparing a solution with the correct concentration, applying it uniformly, and observing safety protocols.
Determining the target concentration
- Recommended field rate for flea suppression: 0.1 mg active ingredient per square meter (approximately 0.05 ml of 10 % cypermethrin concentrate per 5 L of water).
- Verify local label instructions; some jurisdictions permit up to 0.2 mg m‑2 for heavy infestations.
Calculating dilution volumes
- Identify the total area to be treated (e.g., 100 m²).
- Multiply the area by the desired dose (0.1 mg m‑2) to obtain the total active ingredient required (100 m² × 0.1 mg = 10 mg).
- Convert mg to ml of concentrate: a 10 % formulation contains 100 mg ml‑1, so 10 mg ÷ 100 mg ml‑1 = 0.1 ml of concentrate.
- Mix the measured concentrate into the chosen volume of water, typically 5 L for easy handling. Adjust proportionally for larger or smaller batches (e.g., 0.5 ml in 25 L for 500 m²).
Preparation steps
- Use a clean, chemically resistant container.
- Add the measured concentrate to water; stir gently to avoid foam.
- Do not add concentrate to water already in motion, as splashing may cause aerosol formation.
- Allow the solution to stand for 5 minutes to ensure uniform distribution.
Application guidelines
- Apply with a low‑pressure sprayer, maintaining a fine, even mist.
- Cover soil surface, leaf litter, and cracks where fleas reside.
- Avoid runoff into waterways; limit application to the target zone.
- Re‑treat after 7–10 days if flea activity persists, but do not exceed the maximum cumulative dose specified on the label.
Safety measures
- Wear nitrile gloves, goggles, and a disposable coverall.
- Keep children, pets, and non‑target organisms out of the treated area for at least 24 hours.
- Store unused concentrate in a locked, ventilated cabinet away from heat sources.
- In case of skin contact, wash immediately with soap and water; seek medical advice for inhalation or ingestion.
Following these calculations and procedures yields a solution that maximizes flea mortality while minimizing environmental impact and human risk.