By Whitney Cranshaw, Colorado State University Cooperative Extension, Specialist in Entomology
Bug-zappers are almost worthless for mosquito control. Despite their continued wide-spread sale and popularity, study after study shows they have no value for control of mosquitoes in ordinary outdoor settings. People receive just as many bites when a bug-zapper is used as when it is not.
Bug-zappers, of course, do kill some insecs but kill very few of those that cause problems and bites. A recent examination of what was killed in such traps found only 31 mosquitoes or other biting flies out of 13,789 insects (0.22%). But 13.5% of the insects killed were predators or parasistes (beneficial insects) of other, undesirable, insects.
Photograph courtesy of John VanDyk, Iowa State University Department of Entomology.
© CSU/Denver County Extension Master Gardener 2010
888 E. Iliff Avenue, Denver, CO 80210
Date last revised: 01/05/2010