论文部分内容阅读
通过对川西高原蜀云杉球蚜(Pimeus sichunanus)危害情况的系统调查,探讨了蜀云杉球蚜发生危害的规律。通过对害虫发生与林分类型、树龄、方位等因素的关系,探讨了蜀云杉球蚜发生的主要影响因素。研究结果发现,蜀云杉球蚜危害呈现一定规律:树冠层中下部和南向方位危害较重;树龄以20~30年生云杉受害最重;林分类型以疏林地和灌木林受害最重;海拔在3 500m以下林区受害最重。本研究结果为深入研究蜀云杉球蚜及其防治方法提供了重要科学数据。
Through systematic investigation on the damage of Pimeus sichunanus in the western Sichuan Plateau, the law of occurrence and damage of A. sprucelensis was discussed. Through the relationship between the pest occurrence and the type of forest, the age of the tree, the location and other factors, the main influencing factors of the occurrence of the B. sphacevae were discussed. The results showed that the damage of A. sphaerocephala showed a certain rule: the middle and lower parts of canopy trees were more damaging to the south-facing azimuth; the age of 20-30 years old spruce trees suffered the heaviest damage; and the types of forest were the most affected by sparse woodland and shrubbery ; The forest below 3 500m above sea level hardest hit. The results of this study provide important scientific data for in-depth study of A. sphaeroides and its control methods.