University of Florida scientists find brown dog ticks resistant to major pest control treatment

For several years the brown dog tick has been eluding homeowners and pest control professionals after treatment, leading many homeowners to drastic measures to get rid of the pests. After years of studying the brown dog tick (Rhipicephalus sanguineus), University of Florida entomologists are learning why some chemicals are no longer effective against the pest, and which ones still work.

In 2009, University of Florida entomologist Phil Kaufman received a USDA Southern Regional IPM grant to study whether the brown dog tick was developing resistance to permethrin and fipronil, the two major active ingredients in spot treatments for pets. Kaufman said that he would get calls from people whose houses were overrun with ticks after they tried unsuccessfully to get rid of them.

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