萧氏松茎象发生成因及生态控制对策

萧氏松茎象是我国近年来出现的严重危害国外松的钻蛀性害虫。通过对萧氏松茎象在江西6年来的发生动态及其发生区生态地理结构特征的分析,认为萧氏松茎象是一直生存在马尾松林的本地种;湿地松十分适宜萧氏松茎象的生存和繁殖。湿地松的大面积栽种改变了萧氏松茎象原有的生态环境条件．再加上目前尚未发现有效的天敌．导致该害虫生态调控失衡,种群数量上升．提出了相应的生态控制对策。

Occurrence of a New Pine Borer, Hylobitelus xiaoi Zhang and its Ecological Control

Hylobitelus xiaoi Zhang is a new borer in exotic pine trees, and the pest disarsters have been occurring seriously in Jiangxi Province of China in recent years. The structure characteristics of the ecological geography of the H. xiaoi breeding area and the pest population dynamics in recent years were analyzed. It seems rational to consider H. xiaoi to be native to China. Thousands of hm~2 of exotic pine plantations have been planted in China. Slash pine appears to be the most susceptible of the pines to H. xiaoi, and serves as a major natural reservoir for the insect. Dark and humid environmental conditions are very suitable for the pest to breed. No one knows whether there are any natural enemies which can play an important role in inhibiting the popuplation dynamics of H. xiaoi in the exotic pine plantations. Some strategies for ecological control are recommended.