Spraying the colony takes at least 10 times longer than vaporizing with oxalic acid and the result is the same. A big different is the price, oxalic acid cost only a few cent for each treatment. :::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::: -- Visit www.honeybeeworld.com/BEE-L for rules, FAQ and other info --- ::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::