ABSTRACT

Arkansas research on COTMAN insecticide rules in production systems following boll weevil eradication or in systems using Bt varieties gives no evidence to support crop protection for bollworm, budworm or tarnished plant bug infestations that occur beyond NAWF=5 plus 350 heat units. An average expenditure of $24/acre for late-season protection was not exceeded by the value of the 17 lb of increased yield found in the grower validation studies in Bt and boll weevil eradication systems.