What on earth don't you want bees? They are essential to fertilising crops and pollinating fruit trees and the world's population would starve to death without the essential function they perform. Bees rarely sting unless they are threatened. They're not like wasps which can be a nuisance. Please reconsider. If you don't want any bees in your garden, just lay the whole lot to grass but this would be a tragedy for the bees, and also for mankind because removing the flowers which nourishes them is doing your bit for the environment and keeping them alive to pollinate your neighbours' nearby fruit trees, raspberry & strawberry plants, runner beans, tomatoes, etc.