论文部分内容阅读
黄斑星天牛是杨树毁灭性的蛀干害虫,近年来,国内对黄斑星天牛的发生规律及生活习性进行了较系统的研究,发现它对杨树危害具有严格的选择性。白杨派树种抗虫是因为树体内含有多种抑制天牛危害的物质。Robring 和 Samborshi 分析了树木抗虫性的原因,他们认为树体内含有各种引诱和驱避害虫的物质。美国生物学家杰克·舒尔茨发现一些树木和其它植物能够产生适量的青
In recent years, the occurrence and the habits of the yellow star celastrus have been systematically studied and found to be strictly selective to poplar damage. Poplar tree insect resistance is because the body contains a variety of substances that inhibit the hormones. Robring and Samborshi analyzed the causes of tree pest resistance, believing that the body contains a variety of substances that attract and repel pests. American biologist Jack Schultz has found that some trees and other plants produce the right amount of green