Advantage Treatment Spray contains the active ingredient Nylar, an insect growth regulator that kills larvae, and stops eggs from hatching into biting adult fleas. (1800petmeds.com)
The ingredient pyriproxyfen is an Insect Growth Regulator (IGR), and stops flea eggs from hatching into biting adult fleas. (1800petmeds.com)
«When exposed to an IGR, insect eggs fail to hatch and die before becoming biting adults.» (petbusiness.com)