A few days ago when I posted that a solar melter will not sterilize equipment, I was asked off list for the temperature at which AFB spores are killed. I thought this was covered on-list, but was not successful searching the BEE-L archives. I was surprised not to find the answer in _THatHB_ or _ABCs..._ and not even in _Honey_Bee_Pests,_Predators,_and_Diseases_ by Morse and Nowogrodzki. The closest I could come was that in preparing samples for examination for AFB one must heat the solution to 80dC to kill non-sporative bacteria. The texts did not give the lethal temperature for AFB spores. So now that I've searched the archives and checked three text books I'll impose a simple (I thought) question on the list. What is the lethal temperature for spores of Bacillus larvae (American Foulbrood)? TIA, Aaron Morris