Q.Does Permethrin Wasp Powder Lose Its Potency If Unused Product Is Kept
I have some rentokil wasp powder that was opened and used I couple of years ago and I kept what was unused. So will the remaining amount still work ? Second question is how should I dispose of unused wasp killer that contains permethrin.
Certified GKH Gardening Expert
It will be best to look on the container, since the manufacturer will have a specific date. This can be a guideline for a rough estimate of how long it will be effective.
As far as disposing of permethrin- Check the label or packaging of the spray for any specific disposal instructions provided by the manufacturer. They may have specific guidelines for proper disposal. If there are no specific instructions, you can dispose of the spray can in your regular household trash. Make sure the can is completely empty before disposing of it. Spray it in a well ventilated area, like outside, then it will be safe to dispose of the empty can.