HOPE it is 3 treatments. I've done like 5 (Imidacloprid) with my two juniper that got scale and while they have improved they still have it. Planning to hit with Safari this week.
My bottle cost me about $130. I have many many plants I spray. Started using it in December inside and now outside. Based upon current use I think I have used about $20 worth. If I can get 3 years out of a bottle I am pleased but it looks like I will get 5 or 6 years out of a bottle.