How to dilute permethrin for fleas? - briefly
Mix 0.5 ml of 25 % permethrin concentrate with 99.5 ml of water to achieve a 0.125 % solution suitable for flea treatment; apply the diluted spray evenly to the pet’s coat or environment.
How to dilute permethrin for fleas? - in detail
When preparing a diluted permethrin solution for flea treatment, follow these precise steps to ensure safety and efficacy.
Measure the active ingredient. Commercial permethrin concentrates typically contain 5 % or 10 % permethrin. Verify the concentration on the label and calculate the amount needed for the target dilution, commonly 0.5 % for topical application on pets or 0.1 % for environmental spraying.
Calculate the volume of water required. For a 0.5 % solution using a 5 % concentrate, mix 1 part permethrin with 9 parts water (1 ml concentrate + 9 ml water = 10 ml solution). For a 0.1 % solution with a 10 % concentrate, combine 1 part concentrate with 99 parts water (1 ml + 99 ml = 100 ml).
Use a clean container made of glass or high‑density polyethylene. Add the measured permethrin to the container first, then slowly pour the measured water while stirring continuously. This order prevents splashing of the concentrate and promotes uniform distribution.
Stir the mixture for at least 30 seconds until the solution appears clear and no droplets remain on the container walls. Do not use vigorous shaking, which can introduce air bubbles and reduce stability.
Label the container with concentration, date of preparation, and intended use (e.g., “0.5 % topical for dogs”). Store the solution in a cool, dark place, away from direct sunlight and out of reach of children and non‑target animals. Most diluted solutions remain effective for up to 14 days; discard any that develop odor, cloudiness, or separation.
Apply the solution according to the specific method:
- Topical pet treatment: Use a calibrated spray bottle or dropper to apply the solution evenly over the animal’s coat, avoiding eyes, mouth, and open wounds. Allow the pet to dry before contact with other animals or bedding.
- Environmental spray: Fill a pump‑action sprayer with the solution, adjust the nozzle for a fine mist, and coat surfaces where fleas hide (carpets, upholstery, cracks). Do not oversaturate; a light mist is sufficient.
Observe safety precautions throughout: wear disposable gloves, protective eyewear, and a mask if spraying in enclosed spaces. In case of accidental skin contact, rinse with copious water for at least 15 minutes. If ingestion is suspected, seek veterinary or medical assistance immediately.
Maintain a log of each dilution batch, including concentration, volume, date, and observed efficacy. Regular monitoring of flea counts will indicate whether the concentration requires adjustment or if re‑application is necessary.