Kills all four stages of the flea including the larvae and pupae stage. Prevents eggs from hatching and restarting the infestation all over again. Also kills brown dog ticks. Controls fleas and ticks for up to 7 months. Great for carpets, pet's bedding,etc. Active Ingredients: 0.02 percent Pyriproxyfen, 0.10 percent Pyrethrins and 0.50 percent MGK 264.