Brian- You didn't say what you want to fumigate for but I assume it would be wax moths. Both the American Bee Journal and Bee Culture had articles in their November 1993 editions which might interest you. In Bee Culture, Bill Sames' article described past present and future control. In ABJ, Steve Taber's article dealt with HYG bees. A number of years ago I visited the outfit of Shannon and Glenda Wooten in Northern California where I was shown a temperature control system using swamp coolers that Shannon said controlled his moth problem. You might want to contact him. Sorry, I don't have his number but you can obtain it from his father-in-law, Homer Park, ph. 916-547-3391 or 916-549-3555 . John Gates, Apiculture Specialist B.C. Ministry of Agriculture, Fisheries and Food 4607, 23rd. St. Vernon, B.C. Canada, V1T 4K7 Ph:( 604) 549-5580 fax:(604) 549-5488 Internet:[log in to unmask]