From Wikipedia: "Acetic acid is one of the simplest carboxylic acids (the second-simplest, next to formic acid)." So my question is, "Might formic acid be as effective as acetic acid to fumigate equipment to kill Nosema spores?" I ask because it's not easy for small/mid-sized operations to come by the proper quantity and concentration of acetic acid for fumigation. I was thinking the plastic covers for Ross Rounds would make good containers to hold the CH3COOH but I am not sure if the plastic will react with the CH3COOH. Does anyone know? Hard data please, not opinions. Aaron Morris - I think, therefore I bee! **************************************************** * General Information About BEE-L is available at: * * http://www.honeybeeworld.com/bee-l/default.htm * ****************************************************