纵坑切梢小蠹对健康马尾松人工林的侵害特点

Damage Characteristics of Tomicus piniperda in Healthy Man-made Forest of Pinus massoniana

近年来,纵坑切梢小蠹在贵州省扎佐林场大面积健康马尾松人工林分时有发生。研究结果表明:小蠹虫通过集群攻击零星健康木成功入侵,然后定殖并扩大为害。初期性侵害特性是小蠹虫对为害健康树木的适应性表现。7～9月是小蠹蛀梢和蛀干为害高峰的重叠时期,尤其以8月份为害最为严重。

Tomicus piniperda have occurred in large areas of healthy man-made forest of Pinus massoniana forest in Zhazuo forest farm of Guizhou Province in recent years. Research results showed that sporadic healthy trees had been attacked by clusters of Tomicus piniperda, then damage had been colonized and expanded. Primary damage characteristics of bark beetles were a kind of adaptability to healthy trees. The peak time of the shoot-feeding period and the trunk-attacking period was overlapped from July to September, August in particular.