论文部分内容阅读
杨树为我省四旁绿化的主要树种之一,近几年来,由于白杨透翅蛾(Paranthrenetabaniformis Rott.)的猖獗发生和危害,造成幼苗风折,幼树断顶,直接影响了苗木、林木的产量和质量。为了掌握其生活史,寻求防治方法,保证苗木、林木健壮生长,促进社会主义林业建设,我们从1972年开始调查该虫的分布和危害,并以西安市大雁塔苗圃为基点,进行了生物学特性观察和防治试验。现将初步结果,整理如下。
Poplar is one of the main tree species around the province. In recent years, due to the rampant occurrence and damage of Paranthrenetabaniformis Rott., The inflorescence of seedlings and the breaking off of young trees directly affect the growth of seedlings and trees Yield and quality. In order to grasp its life history, to seek ways to prevent and control, to ensure the robust growth of seedlings, trees and promote the construction of socialist forestry, we began in 1972 to investigate the distribution and hazards of insects, and Xi’an Big Wild Goat Pagoda nursery as a starting point for biology Characteristic observation and control test. Now the preliminary results, sorted as follows.