----- Original Message ----- From: "Bob Harrison" <[log in to unmask]> I later confirm my field diagnosis with the microscope. > If Peter is only looking for the blackened trachea then I agree. If he is > seeing the actual tracheal mites then we have got a problem here. Bob Yes, I am looking for blackened trachaea as a positive indicator of acarine infestation. Does anything else cause blackened trachaea (except smoking!)? Peter Edwards [log in to unmask] :::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::: -- Visit www.honeybeeworld.com/BEE-L for rules, FAQ and other info --- ::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::