It is far too warm to be using MAQS/Formic Pro in my opinion. I realize the label states that it can be used upto 85 degrees F. My experience is that I would not use it much above 75 degrees F. It is just far too strong and harsh on the entire hive, queens, brood, workers, and all. I get very good mite drops and a follow on brood explosion 3 weeks after thermal treatment with the Mighty Mite Killer on my hives. In cases where I am not able to get to some hives in time , I treat with Apivar as a stop gap measure until I can. I Keep 2 ProVap 110's to treat during Winter should the need arise.
I tried using MAQS last season in October and that will be the last time I use it. The MAQS treatment was very effective but it was VERY hard on the brood and hive in general even though I treated at 78 degrees F.
When ever possible, I prefer to employ chemical free treatments that ARE very effective and the Mighty Mite Killer indeed meets and exceeds my preference and expectations.