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小蠹虫体形微小,在树身和采伐的材段内部危害。发生数量多,其危害十分严重。此类害虫除少数为初期害虫外,大部分为次期性害虫并喜侵入衰弱林木,入侵后加速衰弱林木的死亡。作者在该县大滩林场的千松坝发现云杉小蠹(Scolytus sinopiceusTsal),危害31—45年生天然白(木千)林,并造成许多单株枯死。在邓栅子等林场的油松针叶林和天然长叶白榆林内林木受害死亡率高达5％左右,给林业生产造成很大损失。
Small beetle body shape is small, in the tree body and harvested timber section within the hazard. The number of occurrences, the harm is very serious. Except for a few of these pests, most of them are secondary pests and they like to invade the diseased forest and accelerate the death of the diseased forest after the invasion. The authors found Scolytus sinopiceusTsal in the Qiansongba Dam in Datitan Forest Farm in the county, which harmed the natural white (Helianthus annuus) forests aged 31-45 years and caused many single plants to die. In Dengzengzi and other forest pine coniferous forests and natural long-leaf white Yulin within the mortality rate of trees up to 5%, resulting in great loss of forestry production.