Per my local university ... Bifen .2g held up for 60 days but by 90 plots were infested, for liquid app says closer to 1 gallon per 1000 would be best.
Baits - Advion fast knock down and amdro slower, both equal in control
Baits growth regulators(distance, extinguish, logic, award, etc) - longer to work but with proper application may only need 1 app per year.
Longest control - fripinal or aloft, expensive but the longest available control.
I'm curious what products you've used and what you offer? One time fripinal app or baits every few months per label? Bifen spray every 60-75 days?
For those who do Bifen or baits, when do you try to time your first application .... Prior to seeing mounds or once they start popping up?