Re: HITS method of mite control
This is where it gets kind of tricky. Assuming a 1/2 cup 300 bee sample. In the spring when hives are full of brood I would consider anything running 3 or more is trouble brewing and if your mite control going into the winter was good it isn't unrealistic to expect a lot of negatives or 1 mite readings. By mid August you are probably still in good shape if you are staying somewhere in the high single digits. In our area from mid August to mid September immediately upon removing the last honey supers is the real sweet spot for mite control with your product of choice. I prefer thymol but a case can certainly be made for Formic, Hopguard, or even an Amitraz product for those who choose that route. The thymol treatment has kept our numbers down in the single digits until they are broodless when an oxalic application will really hammer them. Coupled with a spring brood break that has been our program, simple, safe, and effective and the honey tests free of any residual contaminants. This spring I did ether rolls on 50 actively brooding prospective breeders and found a total of 3 mites. I am sure many more would have been found a month earlier when there was little brood in the hive. In short there are no absolute numbers in mite counting, the time of year, amount of brood and a little sample deviation must always be considered but by adding all your information together a broad picture should emerge of what your true varroa picture is.
Originally Posted by squarepeg
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