Varroa Treatment Advice
3 years ago i gave a talk to the Beekeepers a the South West of Scotland Beekeepers Twynholm and told them not to trickle Oxalic Acid as harmed the bees I almost got laughed out of there meeting! Now the following quote from the University of Sussex
“Professor Francis Ratnieks, head of LASI, says that beekeepers should cease using the other two methods (“trickling” and “spraying”, in which a solution of oxalic acid is used) as they are harmful to the bees and lesseffective at killing Varroa.”
http://www.sussex.ac.uk/broadcast/read/33537
A honey bee hive being treated with oxalic acid via sublimation. The oxalic acid vapour is normally confined to the inside of the hive but is show:n here for illustration. Credit To: Sussex ac uk