Hi All Just to pick up on the assertation that using an biologically produced oil would avoid the danger of damaging humans, I have the following beliefs apart from aggreeing with what Dr Rodriguez said in his reply. Most vegetable oils are present in plants in small amouunts. Our bodies can metabolise these small amounts. If one takes forty kilograms of sunflower/rape seeds and squeezes out a litre of oil to eat/drink/pour on bees, it is unlikely that it wouuld have been possible to eat 40 kg's of sunnnflower seeds, so natuurally we cannot deal with an extract of that volume. So if you eat chips you get cholesterol. If bees eat the oil, which they may, they will be able to digest some of it and it may mess with their metabolisms. The FGMO is inert however and will pass throuugh them maybe only affectinng their absorbtionn of certain things. SO IMHO FGMO is OK and a vegetable extract is not. (A bit like the whole Oleander is natuural so the cyanide theirin is safe theory) Keep well Garth --- Garth Cambray Kamdini Apiaries 15 Park Road Apis melifera capensis Grahamstown 800mm annual precipitation 6139 Eastern Cape South Africa Phone 27-0461-311663 On holiday for a few months Rhodes University Which means: working with bees 15 hours a day! Interests: Fliis and bees Disclaimer: The views and opinions expressed in this post in no way reflect those of Rhodes University.