New research provides evidence that the physical damage of catnip (Nepeta cataria) and silver vine (Actinidia polygama) leaves by feline licking and chewing enhances the release of iridoids — compounds repellent to arthropods such as mosquitoes — and, in combination with enhanced self-anointing to transfer iridoids to the fur, acts to provide stronger chemical pest defense. A cat (Felis catus) licks and chews silver vine (Actinidia polygama)...
