抄録
Non-target species trapped by synthetic pheromone-baited sticky traps for six lepidopterous pests on apple trees, Carposina sasakii, Adoxophyes orana fasciata, Archips breviplicanus, Archips fuscocupreanus, Grapholita molesta and Phyllonorycter ringoniella, were studied in central Hokkaido from 1984 to 1985 and in northern Hokkaido in 2004. In northern Hokkaido, surveys were conducted not only in a conventional pesticide-application orchard but in a communication disruption orchard. The following species were numerous comparatively; Meridarchis excisa in traps for C. sasakii, Archips audax and Neocalyptis angustilineata in traps for A. orana fasciata, A. audax, Homonopsis foederatana and Pandemis monticolana in traps for A. breviplicanus, and Cnephasia stephensiana stolidana in traps for G. molesta. Although the distinction of these non-target species from the target species was generally easy, it was difficult to distinguish Grapholita spp. (e.g. G. dimorpha, G. tenebrosana) from G. molesta in the same trap. It was considered that most of the non-target moths caught by traps had invaded from the orchard surroundings and trap specificity was influenced largely by the flora of the orchard periphery.
