Stefan Stangaciu is right in this point: sooner or later our best scientists willfind other methods, more bio-ecologically ones, in favor of our bee colonies and not in our personal budget...I believe that Nature, or God if you prefer, has found the best ways toselect the strongest bee colonies through millions of years of evolution,and we, "clever" humans, have still a lot to learn... It's true Nature has found the best way: Once upon a time we had a strong honeybee. But nowadays in some countries beekeepers are not working according Nature (using artificial breeding methods, pesticides ...). This is the reason why the honeybee is getting weaker and weaker. Organic beekeeping is able to stop the decline of honeybees. Friendly yours Michael Thiele T+T Consult International Certifier for Organic Beekeeping [log in to unmask]