Hi Paul, Do you have the references of the two studies stated in your post (ie the Cornell study and the study that measured the amount of toxin in the plant).- Regards Adony Adony Melathopoulos Apiculture Biotechnologist Agriculture and Agri-Food Canada Beaverlodge Research Farm Box CP 29 Beaverlodge, Alberta CANADA T0H 0C0 T +1 780 354 5130 F +1 780 354 8171