Here's a bit more about research into using essential oils to help bees.
Apparently the idea has been around for awhile as this article was last updated in 1996. This particular article talks about wintergreen and spearmint essential oils.
Thought this was a neat article.It seems essential oils can be used for almost anything nowadays!
Using Spearmint And Lemongrass To Protect Bees From Mites That Threaten Hives—Bees swarm through the smoke as Professor James Amrine attempts to hook a pollen trap to one of the 20 beehives used for research.