中文摘要：

沙蒿木蠹蛾Holcocerus artemisiae Chou et Hua是危害油蒿Artemisia ordosica Krasch和籽蒿A.sphaerocephalaKrasch的重要钻蛀性害虫,以幼虫蛀食根部,导致寄主植物长势衰弱甚至死亡。为有效控制其危害,我们对该虫形态和生物学特征结合野外调查和室内饲养观察进行了研究。结果表明：在宁夏,该虫2年发生1代,以幼虫在被害油蒿根部越冬;老熟幼虫于5月中旬从受害根部钻出,在周围的沙土里结茧化蛹,蛹期平均19.5±3.5d;成虫始见于6月初,终见于8月末,期间经历3次羽化高峰,分别为6,7,8月的上旬。成虫羽化主要在14：00-17：00,整个过程持续30～45min;羽化当日即可交配,交配时间为20：00-21：00,高峰期为20：30左右;雄虫有2次交尾现象。雄虫寿命2～3d,雌虫寿命1～3d,极少4d。雌雄性比约为1∶2.16。卵初见于6月中旬,初孵幼虫初见于6月下旬。幼虫常单独危害,且具有转移危害的习性,蛀食坑道不规则。5-9月,油蒿受害率为11%～44%,平均24%,株虫口密度为0.13头/株。幼虫对油蒿的树龄和地径有较明显的选择性,主要危害1～4年生、地径16～34mm的油蒿。沙蒿木蠹蛾生物学特征的系统研究为其控制措施的制定提供了科学依据。

英文摘要：

The sand sagebrush carpenterworm, Holcocerus artemisiae Chou et Hua, is a severe pest of Artemisia ordosica and A. sphaerocephala, with the larval stages boring into the roots of the host plants. Morphological and biological characteristics of H. artemisiae in Ningxia were studied through field survey and laboratory breeding and observation. The results showed that a generation takes two years in fields of Ningxia. Larvae of all instars were found to overwinter in the host plant roots. Mature larvae begin to pupate in mid May in the soil around the base of plant stems, with the average pupal stage lasting 19.5±3.5 d. Moths emerge from the beginning of June to the end of August, with three peaks of eclosion observed in the early June, early July and early August, respectively. Adult emergence occurs mainly in the afternoon （between 14：00-17：00）, and takes 30-45 min. Copulation peaks in the late evening （around 20：00-21：00）. The longevity of adults is 2-3 d for males and 1-3 d for females, with a sex ratio of 1∶ 2.16 （female ∶ male） in Ningxia fields. Female moths start laying eggs near mid June, and the eggs hatch in late June. Larvae consume a single root alone in irregular tunnels before transferring to another. They were found to cause 11% -44% damage （average 24%） on A. ordosica from May to September, with a population density of 0.13 individuals per root. There was a significant difference in the selectivity of H. artemisiae larvae to tree age （1-4 years） and ground diameter （16-34 mm）. The systematic research of biological characteristics of H. artemisiae provides scientific evidence for its control.