Sentences with phrase «engineered pyrethrum»

The new generation of controls includes natural or genetically engineered pyrethrum, a daisy; flea - specific growth inhibitors (products containing fenoxycarb and methoprene); an environmental control that desiccates fleas and larvae; a once - a-month pill (Program) that prevents the formation of chitin, the flea's external body covering; and new surface products applied to the dog's skin or coat (Advantage and Frontline).