中文摘要：

油蒿（Artemisia ordosica）钻蛀性害虫包括沙蒿圆吉丁虫（Sphenoptera sp.）（鞘翅目：吉丁虫科）、沙蒿大粒象（Adosopius sp.）（鞘翅目：象甲科）、沙蒿木蠹蛾（Holcocerus artemisiae）（鳞翅目：木蠹蛾科）和一种卷蛾科（Tortricidae）蛀茎害虫,主要分布于我国的内蒙古、陕西、宁夏、甘肃等省区（阎伟等,2009a;2009b）,且有大面积暴发的趋势。它们主要以幼虫危害油蒿根和茎基部,在根茎内钻蛀隧道,破坏木质部而导致油蒿死亡。

英文摘要：

Artemisia ordosicais is an important shrub widely distributed in northern China for combating desertification.Recently large areas of A.ordosica were damaged by several species of woodborers.From 2006 to 2008 in Yanchi,Ningxia Hui Autonomous region,China,an investigation on the spatial patterns and relationship of woodborer larvae,and their parasitoid Pyemotes herfsi and pecks of their predator,Perdix dauuricae in A.ordosica shrubs at different succession stage showed that in horizontal direction,borer larvae,parasitoid P.herfsi and P.dauuricae pecks were in negative binomial distribution,while in vertical direction,borer larvae were mainly distributed on A.ordosica trunks from above ground 3 cm above ground to under ground 6 cm.Their natural enemies also favored this range.In the succession of A.ordosicais,the natural enemies had a significant following effect.