论文部分内容阅读
杨枝天牛(Saperda populnea L.)是宁夏杨树的重要害虫,六十年代,区农林科学院林科所曾对此虫在银川平原的生活习性及防治方法作了研究,但此虫在六盘山林区为两年一个世代,而在银川平原及其他省区则为一年一个世代。为找出适宜的防治措施,我们从1980～83年对此虫的生活年史和防治方法进行了研究,现总结如下。一、林区概况六盘山林区属西北高寒阴湿地区,海拔1700～2940米,年均气温5.7℃。全林区有
The poplar (Saperda populnea L.) is an important pest of poplar in Ningxia. In the 1960s, the Linke Institute of the Academy of Agriculture and Forestry Sciences had studied the habit and control methods of the insects in the Yinchuan Plain. However, The district is two generations of a generation, while in the Yinchuan Plain and other provinces, it is a generation from generation to generation. In order to find out the appropriate control measures, we studied the pest’s life history and control methods from 1980 to 1983, and are summarized as follows. I. Forest Overview Liupanshan Forest is a cold and humid northwest alpine area, 1700 ~ 2940 meters above sea level, with an average annual temperature of 5.7 ℃. There are all the forest area