I live in central VA USA and just applied the MAQS two weeks ago during a quick and brief cooler spell in the upper 80's the first day, low 90's the second day and then around 96 the third day and low 90's after that. The hives were 2 deeps tall and i had moved the upper deep back about 1/2 inch and had open screen bottoms. The queens were all fine but had stopped laying for atleast 4 days as i only had eggs on the 7th day.
I applied thymol api guard gel just this past friday on more hives to test it.
I like the MAQS's quick application and time period, and i saw dead mites ontop of the pads so i know it killed mites, but the only way i can tell if it knocked them back IMO is when the brood gets caped etc, prior to the treatment i had spotty brood, alot of chewed heads from mite removal via the bees and and uncapping, and alot of DWV. So we shall see.
Buffalo Bee Farm