How much liquid sevin concentrate to one gallon of water to kill fleas?

I was told by tech at their 800# a person ONLY needs to use 1.5 fl. Oz. Of liquid concentrate. This marvelous item measures out one gallon all on its own!! I purchased a CAMELLION (sp?.) Found it at "Wallymart." We LOVE IT. It adapts to ANY chemical end hose container. Well worth the extra $3.00. When it rains, you MUST re-apply. MUST !! HAVE A LOVELY DAY !!