I don't imagine so. However, it's a very confusing area! I was going to use a solution of washing-up liquid a while ago to bring earthworms to the surface on a community green. I checked with the authorities and was told that it's illegal to use anything that isn't officially aprooved for use or registered for use as a pesticide. Anything that affects the behaviour of an organism has to be aprooved before use. Have a read of this http://www.pesticides.gov.uk/approvals.asp?id=882