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一、前言近几年来,杨树上蚧壳虫猖獗发生。笔者从1980年起,在西北农学院周尧教授的热情指导下,对西北地区的主要造林树种——杨树的蚧壳虫进行了较系统的调查,对其主要虫种的生活史和习性进行了定点观察,并作了化学农药防治试验。参加标本采集的人员有三北局兰鸣、青海干旱草原研究所高二维、中国林科院王晓原、西北林学院刘智升、陕西渭南林业局丁少平、新疆伊吾军马场陈英智、四川林业设计院赴强等同志。共调查了127个县、市,采集蚧壳虫标本776号次,制作玻片标本937张,初步鉴定有4科、17属、25种。二、为害程度的划分根据“陕西省病虫害普查规程”标准,结合蚧壳虫的为害特点,将蚧壳虫在杨树上的为害程度划分为三个等级;
I. Introduction In recent years, poplar scale insects rampant occurred. Since 1980, under the guidance of Professor Zhou Yao from Northwestern Agricultural College, the author has conducted a systematic survey of the scale insects of poplar in Northwest China, and analyzed the life history and habits of the major insect species Conducted a fixed observation, and made a chemical pesticide control test. Participants in the sample collection were three North Bureau of Lanming, Qinghai Arid Grassland Institute of high two-dimensional, Chinese Academy of Forestry Wang Xiaoyuan, Northwest Forestry College Liu Zhisheng, Weinan Forestry Bureau Ding Shaoping, Xinjiang Yiwu Junchang Chen Yingzhi, Sichuan Forestry Design Institute went Strong comrades. A total of 127 counties and cities were surveyed, 779 samples of scale insects were collected and 937 slides were made. There were 4 families, 17 genera and 25 species initially identified. Second, the division of degree of harm According to “Shaanxi Province, the Code of Disease and census” standard, combined with the scale insects pest insects characteristics, scale insects in poplar damage degree is divided into three levels;