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林业科学 ›› 1999, Vol. 35 ›› Issue (5): 72-76.

• 论文及研究报告 • 上一篇    下一篇

纳曼干脊虎天牛危害损失的研究*

王爱静1,刘宏光2,邓克蓉2   

  1. 1. 新疆林业科学研究院 乌鲁木齐 830000
    2. 新疆克拉玛依市园林科研所 克拉玛依 834000
  • 收稿日期:1999-03-04 出版日期:1999-09-25 发布日期:1999-09-25

STUDY ON THE LOSSES CAUSED BY XYLOTRECHUS NAMANGANENSIS Heydel

Aijing Wang1,Hongguang Liu2,Kerong Deng2   

  1. 1. Xinjiang Academy of Forestry Science Urumqi 830052
    2. Institute of Gardening and Landscape Kelamayi 834000
  • Received:1999-03-04 Online:1999-09-25 Published:1999-09-25

摘要:

纳曼干脊虎天牛是中亚亚区的特有种,国内仅分布于新疆,在克拉玛依市严重危害多种阔叶树,造成树木生长衰弱,严重者干枯死亡,在该虫对克市园林事业发展和已改善的市内生态环境构成很大威胁时,我们立项对该天牛危害损失进行研究,主要方法是在该市街道绿化林带内选择450株标准树,其树龄为15年,定期和不定期观察其危害情况,并于成虫羽化末期将树干分段调查羽化孔数,同时测量树高和胸经,用西北地区榆、桦二元材积表中材积经验方程求出每株材积生长量,将树干上羽化孔分8组,统计其与材积、树高和胸径的关系。经研究该虫危害对树木生长发育和材积生长量影响很大,胸经降幅-1.12 %~ 23.46 %,树高下降率在16.6 %~ 31.1 %,材积下降率8.52%~ 57.12 %,从而确定了防治指标。

关键词: 纳曼干脊虎天牛, 危害损失, 钻天榆

Abstract:

Xylotrechus namanganensis Heydel is a dangerous pest to broadleaved ornamental tree species in the northern plain area in Xinjiang.Adults of this pest eat little, they only take in honey in the flowers or juice of the trees and do not directly harm the trees.Whereas other forms of the pest cause damage to the trees, since all the eggs, larvae and pupae live within trunks of the trees, which delays sprouting, advances leaf shedding, and halters grow th of the infected trees.Both DBH and height of the infected plants were significantly smaller compared to those of the healthy ones.Consequently the timber volume of the former was remarkably less than that of the later.There was linear regression relationship between reduction of timber volume and the number of insect cavities, i.e.Y = 3.9008 +1.6874X, (r =0.9841 **).The infestation index might be indirectly determined in the light of the number of eclosion cavity of the adults, though larvae of the pest bore and take food inside the trunk.Most of eclosion cavities of the adults appeared within the height of 2.5m above the ground.According to the principle that the retrieved loss should be equal to or greater than the expense on pest cont rol, the economic injury level(EIL) of Xylotrechus namanganensis Heydel should be set as 2 eclosion cavities per plant.

Key words: Xylotrechus namanganensis Heydel, Injury loss, Ulmus pumila var.pyramidalis