Be Warned! Oxalic Acid Sublimation for the treatment of Varroa is a healthy and safety exercise first and foremost. You must take every precaution to ensure the safety of both yourself and those around you.Today we're on location treating our colonies with Oxalic Acid Sublimation using the ProVap220 which is available from my website honey.co.uk/provap220">www.norfolk-honey.co.uk/provap220Pete and I travelled to my University apiary to treat my colonies with Oxalic Acid to try to kill more varroa mites before the season kicks off. Remember, we are trying to kill phoretic mites which are those hitching a lift on the backs (and underside) of our honeybees.Following lots of reading it appears that 2.25g of Oxalic Acid Dihydrate was the best dose to use to kill the maximum number of varroa whilst at the same time keeping honeybee mortality to a minimum. You can watch the video of our treatment process on my Patreon page www.patreon.com/norfolkhoney or my YouTube channel "The Norfolk Honey Company".We rely upon the support of patrons on our Patreon page to continue to provide content for all beekeepers. If you feel you could support us please do take a look at that page where options start from as little as $1.The paper that I refer to in the podcast can be found here: Hasan Al Toufailia, Luciano Scandian & Francis L W Ratnieks (2015) Towards integrated control of varroa: 2)comparing application methods and doses of oxalic acid on the mortality of phoretic Varroa destructor mites and their honey bee hosts, Journal of Apicultural Research, 54:2, 108-120, DOI: 10.1080/00218839.2015.1106777