If you treated for mites in August, good job. Now you need to treat again. I have heard that many beekeepers that have tested their colony mite levels recently, discovering a re-infestation of mites. Their levels were high again. This high mite level is attributed to hives that were not treated for mites. Some beekeepers have recently discovered their bees have absconded. Honey is there but no bees. Not even dead bees, just no bees. When colonies abscond this time of year or through the winter months it is almost always due to the Varroa Destructor mite.
This mite needs to be dealt with and now.
acid can be used now in a colony. It can work at 40 - 55 degrees for
the dribble method. The temperature needed for the vaporizer to work
well should be around 40 degrees.
The treatment is fast and easy to do. So please consider doing it.
The hive you save may be your own.
video show from the Ontario Beekeepers treating their colonies with Oxalic Acid dribble
method. Notice they are hitting every seam between the frames with the
Oxalic Acid solution. Dribbling the solution right on the bees.
a graduated 50ml syringe, giving each seam of bees a 5ml dose of the
solution. For a total hive treatment of no more than 50ml.
He is treating two boxes, but for most of us, the bees should be in the bottom box in a two deep hive or the middle box on a three deep hive.