This book about progress and future of pyrethroids, pyrethrin biosynthesis and Its regulation in chrysanthemum cinerariaefolium, recent advances of pyrethroids for household use, the biological activity of a novel pyrethroid : metofluthrin, advances in the mode of action of pyrethroids, mammal toxicology of synthetic pyrethroids, biotransformation and enzymatic reactions of synthetic pyrethroids in mammals, environmental behavior of synthetic pyrethroids, and ecotoxicology of synthetic pyrethroids.