Notes from a presentation at the 2008 Sacramento beek convention: Research 
on using HFCS – when heated to 104 degrees F for as much as 10 days, HFCS 
may produce about 50 ppm of HMF. Bees may not detect it at this level, 
consume it and die. Researchers believe that when significantly above 50 
ppm bees may detect the HMF and probably will not consume it.  

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