虎天牛

用1：10氯仿、酒精混合液处理桑虎天牛幼虫2h对寄生率、单雌产卵量有明显的促进作用，显著优于未经处理的寄主；

On hosts treated with mixed solution of chloroform and alcohol ( 1:10 ) for 2 hours , parasitism rate and fecundity per female were higher than those on control hosts , but period of pre-oviposition prolongs and sex ratio decreases .

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 .

广西咖啡树两种虎天牛的研究

Studies on two long-jorned beetles infesting coffee trees in Kwangsi Autonomous Region

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 .

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 .

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 .