Think I'm on the right tract by going to a 4 day treatment plan. Hit the hive yesterday with it's first four day treatment and had a major mite drop of 280 over the first 24 hours. Got a major spike where the valley always occurs. Almost 40% were colored light brown so it looks like I'm hitting the emergent mites in a big way. Won't have enough data points for the graph for about a week but will post the mite drop counts daily.
It's wearing thin doing daily counts for over a month but knocking the mites out of the hive is getting personal if you get my drift.
Updates to follow.
Second day after the treatment, had a mite drop of 240 which is still high with a lot of light brown mites on the sticky board. Starting to think the numbers really support treating every four days, even three days apart wouldn't be excessive for a heavily infested hive. Going to stay with a four day treatment plan for now.
Third day mite drop of 140
Fourth day mite drop of 125
Second four day OAV treatment
First day mite drop of 185