Pheromone baited trap collections for two sequential years, revealed a dramatic increase in numbers of these diurnal moths that attack poplar plantings in eastern Oregon and Washington. Trap catches in 65 ha blocks over the 13,000 ha planting area were analyzed according to Julian date, age of trees, clonal-variety, temperature range and date of perturbation (harvest or insecticide treatment).
Species 1: Lepidoptera Sesiodea Paranthrene robiniae (western poplar clearwing moth)
Species 2: Lepidoptera Cossidae Pronoxystus robinae (carpenterworm)
Keywords: poplar, borers
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