The BeeHolder, Spring 2012
As mentioned in the apiary report (see page 6), we had unseasonably warm weather around the time we did the oxalic acid varroa treatment. If you performed your own varroa treatments at the same sort of time, it is quite possible that the queen was laying and that a lot of varroa avoided the oxalic acid by being inside sealed brood cells. So be extra vigilant for these little beasties, especially while the bees are under a bit of food stress due to the poor weather we are currently “enjoying”.
To check for varroa, use one or more of the methods proposed in this downloadable document (the link is to the Scottish BeeKeepers web site).
If in doubt about your varroa situation, contact a bee inspector (see contacts page).