Originally Posted by Scooby_Brew
...BTW, "Liquid soap" means any dish soap, i.e. Dawn or whatever you use to wash your dishes.
Not exactly... Most dish "soaps" are actually detergents. I know a lot of people suggest using whatever liquid dishsoaps you have laying around... If you're using it simply as a wetting agent in an insecticidal formula it can work, but for an insecticidal soap, it's the fatty-acids in soap
that is really effective on insects. Then there's the issue of what sort of residue might be left behind. I would suggest a natural soap such as Fels Naptha, Murphy, etc...
Last year I had a pretty major outbreak of spider mites after using Sevin on Japanese beetles. Got them under control by simply spraying the plants with a garden hose twice a day. This year I think I have a good population of spider mite destroyers that have moved in.