Monitoring Azinphosmethyl Resistance in Adult Male Platynota idaeusalis (Lepidoptera: Tortricidae) in Apple from Georgia to New York

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Abstract
Sex pheromone traps coated with concentrations of azinphosmethyl-impregnated adhesive were used to test levels of resistance in adult populations of male tufted apple bud moth, Platynota idaeusalis (Walker) from apple orchards in seven Eastern states. Resistance levels >10-fold were found in insects from five of six Adams County, Pa., orchards, one orchard in New Jersey, and one of two orchards in West Virginia. Moderate levels of resistance (5 to 9-fold) were found in insects from the remaining orchard in Adams County, one orchard in New York, and one of two orchards in North Carolina. Males from three Pennsylvania orchards outside of Adams County, the other orchards in West Virginia and North Carolina, one orchard in Georgia, and two orchards in Delaware had low levels of resistance (P. idaeusalis were moderately resistant to azinphosmethyl, seasonal azinphosmethyl use was high, and only small amounts of carbamate insecticides were used.