In the editorial by Amrine, Stasny, and Skidmore concerning varroa
control with wintergreen and spearmint oils I don't see mention of
whether they used the natural based product or a synthetic
substitute.  The synthetics are much less expensive and I was
wondering which product was used in Bob Noel's experiments.
 
Anyone know or have information on synthetic vs natural oils?  Lorann
Oils, the company mentioned in the article sells both.
 
Daniel Houg
Section of Drinking Water Protection
Minnesota Department of Health
voice: 218/755-3820