|Varroa Destructor on a worker bee|
|MAQS Beehive Strips|
|Don't breathe in|
|MAQS strips placed across the frames|
My thinking is the strips need to placed across the frame tops regardless of the orientation of the entrance so vapour is being released into each seam, more so in the middle of the hive and each there is air flow around the strips to distribute the vapour through the hive. If the strips were placed along the frames you'd probably find a strong concentration of vapour under and above them and no or very little vapour reaching the centre of the hive.
|Queen Excluder goes over the strips|
Over seven days vapour from the evaporating strips fills the hive killing the mites -or 90% of them anyway. With this treatment ventilation is important to distribute the vapour so the manufacturer recommends leaving mesh floors open as opposed to closed with a sliding bottom board. Apparently a test with closed floors showed a 4-5% drop in efficacy. They also not that bees aren't keen on the stuff and it's common for treated colonies to be seen bearding (hanging out of the front of the hive in a mass). After seven days what's left of the strips can be removed and composted. There's some handling instructions for the strips. Basically wear gloves and don't get the stuff it on you. Whilst it does mean a distribution of formic acid throughout the hive the manufacturers point out this is something which occurs naturally in honey in concentrations of up to 2,000 ppm whereas in the hove air the formic acid concentration stays below 100 ppm so it should have no impact on the honey. Now to wait 7 days..