THE REBOUND EFFECT
Traditional pest control tools are reactive: they eliminate rats quickly when populations boom. However, without fertility control, it only takes two rats to initiate a rebound, growing the population back to its original size or larger within a matter of months. Under the right circumstances, a rodent population may never be fully controlled with lethal methods alone.
THE SECRET INGREDIENT
ContraPest has two active ingredients: 4-vinylcyclohexene diepoxide (VCD) and triptolide.
Triptolide, derived from the thunder god vine Tripterygium wilfordii, has been used in traditional Chinese medicines and other over-the-counter supplements. Triptolide affects the reproductive capacity of both male and female rats. VCD is an occupational chemical that selectively destroys ovarian follicles in rats.