油蒿主要钻蛀性害虫的危害特性调查研究

Investigation and Study on Damage Characteristics of Boring Pests in Artemisia ordosica

对油蒿上3种主要钻蛀性害虫的危害特性进行了详细研究,结果表明:沙蒿木蠹蛾主要以幼虫蛀食油蒿的根茎部,而沙蒿圆吉丁和沙蒿大粒象除以幼虫危害根茎部以外,还以成虫取食油蒿叶片作为营养补充。3种害虫的幼虫在油蒿上的分布位置完全不同,沙蒿木蠹蛾和沙蒿圆吉丁在整株油蒿上均有分布,初孵幼虫首先取食茎部的韧皮部和木质部,于同年入冬前转移至根部危害;而沙蒿大粒象则主要分布在根部,初孵幼虫从韧皮部到木质部,逐渐向下危害。

The damage characteristics of the three major boring pests were studied in their host plant A rtemisia ordosica. Results showed that the larvae of H. artemisiae mainly bored the rhizome of A. ordosica,but also the larvae of Sphenoptera sp. and Adosopius sp. bored the rhizome of A. ordosica. The adults of Sphenoptera sp. and A dosopius sp. fed on the leaves of A. ordosica as a nutritional supplement. The distribution of the larvae of three pests in their host plant was completely different. H. artemisiae and Sphenoptera sp. were distributed in the whole A. ordosica plant. The newly hatched larvae first fed on the phloem and xylem of stem and then burrowed to the roots before the winter of the same year. However ,A dosopius sp. was distributed mainly in the roots. The newly hatched larvae moved from the phloem to the xylem, and gradually damaged the lower part of the trunk.