阿拉善左旗飞播植物生长发育特性与环境间关系的研究——飞播沙蒿死亡与虫害的关系

Relationship Between Growth of Roundhead Wormwood Sown by Air and Environment in Alashan Desert Area.

飞播沙蒿生长发育到一定年限后即开始大量死亡，其原因之一是钻蛀性昆虫危害。在调查的８５６株沙蒿中，感虫株１６２株，感虫率１８．９３％。采集到的５１８头害虫样本中，沙蒿同斑螟、沙蒿刺小卷蛾、沙蒿枝小卷蛾三种共占８６．１０％，沙蒿圆吉丁虫占１３．３２％，沙蒿线角蠹蛾占０．５８％。沙蒿植株感虫率与其生长年龄、植株地径密切相关。二年生、三年生、四年生和五年生沙蒿植株的感虫率分别为０．１２％、５．６１％、６．５４％和６．６６％。

Artemisia sphaevocephala Krasch dead of injure from insect pest when it grow for a few years. It was indicated that plants of insect infestation was 162 in 856 tested plants, and the injury rate was 18.93%. Among 518 insects specinmens, Pyralidae homoeosoma, Tortricidae pelochrista and Tortricidae epibactra accounted for 86.10% of all; Sphenoptem sp. 13.32% and Holcoerus artemisiae 0.58%. The injury rate of roundhead wormwood of two years old, three years old, four years old and five years old were 0.12%, 5.61%, 6.54% and 6.66% respectively.