Q.Pure Liquid Soap (not Detergent)
You recently published an article about making homemade insecticidal soap. It call for pure liquid soap, not detergent. Can you give me an example of what that might be? When I google it, there are so many examples but they all seem to be ads to buy their product and I’m not sure exactly what I should be looking for. Is Dr. Bronner an example of a pure liquid soap, for example? What are some others?

Certified GKH Gardening Expert
For homemade insecticidal soaps, a gentle soap like castile is preferable to avoid a lot of the additives and detergents in dishwashing soaps.
However, University extension articles point out that dish soap, even pure soap, are not registered insecticides so results can be inconsistent and risky. It is best to use a commercial insecticidal soap, which has been tested for safety, consistency, and effectiveness.