We are losing (lost?!) our onion crop to thrips this year. We use silver plastic mulch,   had well timed applications of Entrust + Biolink at 70+ PSI. In the past we have achieved control with Entrust. We are guessing the population has developed resistance and that the pressure this year is beyond what we've ever experienced. We would love to hear others' strategies so we can be prepared for next year. 

Thanks, 

Carl