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前言近几年来,杨树上的介壳虫猖獗发生,不仅为害面积越来越大,而且,为害程度越来越严重。笔者从1980年起,在周尧教授的热情指导下,对西北五省(区)杨树上的介壳虫作了连续四年的调查,并对其主要虫种的生活史和习性作了定点观察。共调查了127个县、市,采集介壳虫标本1876号次,制作玻卡标本1237张,初步鉴定有4科17属25种。一、绵蚧科 Magarodidae1.草覆蚧 Drosicha corpulenta(Kuw-ana)分布地点:陕西:甘肃。寄主:加杨、北京杨。危害程度:严重。形态:雌成虫体呈长椭圆形,常为褐色,体长7.8～10毫米,宽4～5.6毫米。体分节明显,腹部背面8节,有的个体末端两节不明
Preface In recent years, the scale insects on poplar rampant, not only increasing the size of the damage, but also, more and more serious damage. Since 1980, under the guidance of Professor Zhou Yao’s enthusiasm, the author has conducted a continuous investigation for four years on the scale insects on the poplar trees in the five provinces (regions) of the northwest China and has made a definite point about the life history and habits of the major insect species Observed. A total of 127 counties and cities were surveyed. Scale specimens of scale insects were collected 1876 times, 1237 glass card specimens were produced, and 4 families, 17 genera and 25 species were initially identified. First, the scale Division Section Magarodidae1 grass scale Kuwana Drosicha corpulenta (Kuw-ana) Distribution Location: Shaanxi: Gansu. Host: Canada Yang, Beijing Yang. Degree of harm: serious. Morphology: Adult female body was long oval, often brown, body length 7.8 ~ 10 mm, width 4 ~ 5.6 mm. Significantly different body sections, the back of the abdomen 8, some of the two ends of the unknown