earticle

영어

Recently, pin oak trees (Quercus palustris) have been planted as roadside trees in urban areas, especially in new town in Gyeonggi-do as well as other local cities. However, some wood boring insect pests, such as Neocerambyx raddei and Synanthedon spp., were frequently observed in many newly planted trees in addition to adult trees. In this study, we assessed injury characteristics in the woody part of tees caused by N. raddei and Synanthedon spp. using sonic tomograph in Wonju-si, Gangwon-do. During July in 2022, a total of ten pin oaks were investigated number of injuries that caused by boring insects on the external part of trees, and then proportion of injured areas in the woody part was assessed based on sonic tomograph images. Based on sonic tomograph images, we found that injury level caused by N. raddei was higher compared with those by Synanthedon spp., especially in xylem areas with borings. Although some Synanthedon-injured trees were showed internal injuries, larvae of Synanthedon spp. are generally fed on inner bark areas not to xylem areas. These results indicate that different management strategies would be needed to control two different wood boring insect species, and more N. raddei-injured trees need detail internal assessment based on non-destructive inspection including sonic tomograph and others to prevent tree hazards, such as breaks and falls.