论文部分内容阅读
杨枝天牛(Saperda populnea L.)又名山杨天牛或青杨天牛,属鞘翅目天牛科沟胫亚科。据报导,杨枝天牛在国内西北(新疆、青海、宁夏)、华北(内蒙、河北、河南、山西、北京)、东北(辽宁、吉林、黑龙江)等省、市、区均有发生。宁夏六盘山林区在山杨、小青杨等树上早有发生,但银川地区1965年以前未见发生,它是以后随着加拿大杨等杨树品种的大量引进而带入的,经过几年繁殖蔓延,现已为害成灾。1972年初我们曾在银川市绿化队、自治区银川苗木实验场调查了几个主要杨树品种的幼树和苗木受杨枝天牛的为害情况,结果列于表1。
Yang Zhi Tian Niu (Saperda populnea L.), also known as Asiatus or Cyanisseria, is a coleoptera Tian Niu furong tibia subfamily. It has been reported that Populus davidiana has occurred in other provinces, cities and districts in northwestern China (Xinjiang, Qinghai and Ningxia), North China (Inner Mongolia, Hebei, Henan, Shanxi and Beijing) and northeast (Liaoning, Jilin and Heilongjiang). The Liupanshan forest area in Ningxia had occurred on the trees such as aspen and the young Populus euphratica. However, the Yinchuan area had not occurred before 1965, and it was later introduced with poplar varieties such as Populus canadensis. Reproductive propagation in the year is now a disaster. At the beginning of 1972, we investigated the saplings and seedlings of several major poplar varieties under the damage of Populus davidiana in the Yinchuan nursery stock experimental site in Greentown, Yinchuan, and the results are shown in Table 1.