老秃顶子国家级自然保护区小蠹虫发生危害调查

Occurrence and damage of bark beetles in Laotudingzi Nature Reserve

在老秃顶子国家级自然保护区共采到小蠹虫29种,隶属4亚科15属,其中红松根小蠹Hy-lastes plumbeusBlandford、东北四眼小蠹Polygraphus sachalinensisEggers、中穴星坑小蠹Pityo-genes chalcographasLinnaeus、落叶松八齿小蠹IpssubelongatusMotschuleky、六齿小蠹I.acuminatusGyllenhal等为优势种,主要危害衰弱木、濒死木、枯萎木及风倒雪压木等,少数种类如纵坑切梢小蠹Tomicus piniperda Linnaeus、黄须球小蠹Sphaerotrypes coimbatorensisStebblng等危害健康树木。不同海拔高度及不同类型的林分中,小蠹虫的种类存在明显差异。及时清除、集中处理风倒木是控制虫源,减轻危害的重要措施。

Twenty-nine species of bark beetles belonging to 15 genus 4 subfamilies were observed in Laotudingzi Nature Reserve. Among them, Hylastes plumbeus Blandford, Polygraphus sachalinensis Eggers, Pi tyogenes chalcographas Linnaeus, Ips subelongatus Motschuleky and Ⅰ. acuminatus Gyllenhal mainly attacking the weak wood, dying wood and withering wood were dominant species. Some species such as Tomicus piniperda Linnaeus and Sphaerotrypes coimbatorensis Stebblng attacked healthy trees. The species of bark beetles were different at different elevations and in different types of woods. Timely treatment of fallen trees was important for the control of insect source.