Evaluation of techniques for monitoring emergence of the banded fruit weevil, Phlyctinus callosus, in deciduous fruit orchards

Abstract

AbstractFour methods of monitoring emergence of the banded fruit weevil, Phlyctinus callosus (Schoenherr) (Coleoptera: Curculionidae), in deciduous fruit orchards were evaluated to develop an accurate and practical system for use by growers. Box emergence traps placed in the drip area of the trees were the most accurate method of detecting the onset of adult emergence in spring. Limb‐jarring and trunk‐bands detected emergence 2 weeks after that by box traps. Cone emergence traps were less sensitive to the onset of emergence than box traps, but more practical, and are judged to be the best method of monitoring the spring emergence of P. callosus adults. The strategic placement of cone traps over weed hosts particularly favoured by P. callosus will increase the accuracy of these traps in detecting the onset of emergence.