Food grade mineral oil (FGMO) applied with an insect fogger was evaluated for varroa mite control in honey bee colonies by comparison to an industry standard, coumaphos strips, and an untreated control group (eight colonies per treatment group). During the six-week test period, the Varroa populations increased in untreated colonies and those treated with FGMO, while those treated with coumaphos strips decreased greatly and, consequently, averaged 96.1 to 99.4% fewer Varroa than the untreated colonies at the end of the test period, by the alcohol wash and sticky board methods, respectively. In addition to providing no control for Varroa, FGMO applied in an insect fogger may pose a fire and/or other health hazard to beekeepers and bees.