Low warfarin resistance frequency in Norway rats in two cities in China after 30 years of usage of anticoagulant rodenticides.

Both genetic analysis and laboratory resistance tests suggested low warfarin resistance frequencies in rats from Zhanjiang and Harbin Cities. The alternate usage of first-generation anticoagulant rodenticides (FGARs) and second-generation anticoagulant rodenticides (SGARs) might represent an effective strategy against the development of warfarin resistance in Norway rats in China. © 2018 Society of Chemical Industry.