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榆跳象(Phynchaenus alni L.)又名榆潜叶象甲,为害榆树叶片。近年来在我区乌盟后山地区发生比较严重。据四子王旗江岸苗圃调查,虫口密度达45头/枝(枝长25厘米)。使全株树叶发黄,枝梢部于枯,影响生长,消弱树势,可导致榆树小蠹虫等蛀干害虫的发生。在江岸苗圃和红旗林场的榆树林中,每年大约有80％的叶片全部变枯,小蠹虫、吉丁等蛀干害虫的发生面积逐年扩大。现将几年来对此虫生活习性及防治方法的观察试验结果整理如下。
Elk hopper (Phynchaenus alni L.), also known as Ulmus canadensis leaves, damage elm leaves. In recent years in our region after Um Shan in the mountains more serious. According to the Sijia Wang flag riverbank nursery investigation, insect population density of 45 / branch (25 cm long branch). So that the whole plant yellow leaves, branches in the dry, affecting growth, weakening the tree potential, can lead to elm bark beetles and other bore pests. About 80% of the leaves in the riverbank nurseries and the elbow trees in Hongqi Forest Farm turn withered and withered. The areas where beetles, jitin and other pests grow each year are expanding year by year. The past few years now pest habits and methods of observation and control test results are summarized below.