ContraPest

ContraPest is a contraceptive-based pest control tool that causes infertility in brown and black rats. It was originally created to supplement existing rodent control strategies and is formulated as a sweet liquid that appeals to rats. It is developed by the U.S. biotechnology company SenesTech.

ContraPest does not sterilize rats permanently; therefore, a continuous supply of the product is required to be effective. In field tests, SenesTech claims that using ContraPest led to a reduction in rat populations by approximately 40% over a period of 12 weeks or longer. In August 2016, the U.S. Environmental Protection Agency approved ContraPest for commercial use.