From the recent talk by Dr. Mary Coffey - the recommended amount of oxalic acid for winter varroa treatment is 2.3grams per hive. Keep the vaporiser in the hive for 3 minutes (sealed) and then remove and keep hive sealed for a further 10 minutes. A piece of duct tape stuck to the hive will allow you to write the time on it and also confirm which hives have been completed.
Always wear rubber gloves and a suitable mask (FFP3 type) when working with oxalic acid.
Do you want to clip and mark your Queens?
If you can find your Queens ok but aren't confident you can clip and mark without harming them, practise on drones first. They can't sting and like the Queen won't pass through the bars of the Queen catcher.
Have you put an eke on your hive for autumn varroa treatment?
Some beekeepers leave the eke on after finishing their autumn varroa treatment. The bees can use the extra storage space by building out the eke with brace comb and fill it with ivy honey. In spring you can check for stores by seeing if there is anything left in the eke without disturbing the bees.
Queen Marking Colours
Since honey bee colonies and hence queen honey bees can survive a number of years a system of Queen marking colours has been devised which, if followed, give an indication of the age of the Queen. The Queen is marked with a spot of paint on her thorax (between the head and abdomen) and the colour scheme is as follows 2016 2017 2018 2019 2020 White Yellow Red Green Blue
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