青杨天牛

本文根据青杨天牛生态习性，提出青杨天牛防治的原则、治理对策。

According to the ecology behavior of polar longicorn , this paper puts forward the prevention principle and countermeasures .

研究制定出青杨虎天牛的防治指标，为科学合理、经济有效地治理该虫提供了理论依据。

The research has provided the prevention standards , providing the theory basis for resolving the problem of the pest in scientific , proper , economical and effective ways .

青杨脊虎天牛雄虫精子分为头部和尾部。

The sperm of male Xylotechus rusticus composed of head and tail .

单宁含量与青杨脊虎天牛虫口密度之间存在比较明显的负相关性。

Negative correlation between tannin content and larvae density of X.rusticus was obvious .

各杨树品系韧皮部同种氨基酸的相对含量差异显著，但与青杨脊虎天牛危害株率无紧密相关性；

In the phloem , the relative contents of the same amino acids in different poplar strains were remarkably different , but there was no significant correlation between amino acid relative contents and the ratio of damaged trees .