read this first from cornell university. wasps cant see red so use red light while you spray in the dark.
bees or wasps? no chance africanized bees on a cliff or slope is there?
read also this from iowa university it even tells you which chemicals to use also tells about the dish soap method and to try it first. if winter coming colony of wasps in the ground will die when freezing temperatures come.
iowa site: http://www.extension.umn.edu/distribution/horticulture/DG3732.html