Pretreatment of adults of IRAQ strain of AfhStephenSt with a sub-letlial dose of pcrmethrin resulted in a 65% enliancemenl of tolerance to this insecticide. Similarly. pre-exposure of DUB-LPR larvae to a sub-lethal dose of pcrmethrin resulted in increased tolerance to pcrmethrin. For the sensitive IND-S strain. https://www.roneverhart.com/Hosa-SH-8X4-25-Stage-Box-Non-locking-8x4-25-p37478/