Re: Economic threshold for treating Varroa mites, mite load
I think its really hard to arrive at a definitive threshold number for treating for varroa. Here are the general rules that I go by. Using a 300 bee 1/2 cup sample size I think you want to see something in the 1% or under range in the late spring if you expect them to make it through a honey season untreated. Late summer numbers ideally are something under 4% and in my opinion getting much over 5% can be dangerous. Post treatment going into the winter you would like that number to be back under 1% and maybe even see a few negative readings. All I can really say for sure, though, is less is better than more. Another reason its difficult to be real definitive on numbers is that viruses are a variable that can compound the problem.
Last edited by jim lyon; 02-27-2013 at 05:01 PM.
Reason: additional info
"Ve are too soon olt und too late schmart."- A nameless German philosopher