Was at a pesticide class and the guy said that he sprayed bifenthrin at 1 qt per acre and it sent fire ants running for months. What length of control are getting if using bifen? I was thinking that 6-8 weeks at most but have been doing topchoice or mound treatments only. This is beginning to be a nuisence and I want to get ahead of the game. Then I found this... http://www.aces.edu/pubs/docs/A/ANR-0175-A/ANR-0175-A.pdf At the bottom is has bifenthrin listed with a 123 day half life. So they are saying 4 months of control??