北京林业大学学报2026，Vol.48Issue(9)：79-87,9.DOI:10.12171/j.1000-1522.20260173
基于树冠变色特征的越冬期雪岭云杉枝干小蠹分布规律及其防控
Crown-discoloration-driven distribution patterns and control of two overwintering bark beetles(Ips hauseri and Pityogenes spessivtsevi)on Picea schrenkiana stems
摘要
Abstract
[Objective]In the eastern Tianshan Mountains,natural Picea schrenkiana forests are progressively declining as a result of persistent damage by Ips hauseri and Pityogenes spessivtsevi.Removing infested source trees during the overwintering period is an important control measure,but winter operations are largely confined to aboveground damaged trees.To enable the precise removal of these beetle sources,this study clarified the distribution patterns of the two bark beetle species in the trunks and branches of Picea schrenkiana at different damage stages during the overwintering period.The findings provide a basis for developing scientific and precise overwintering control strategies.[Method]In the early overwintering period,Picea schrenkiana trees were assigned to five damage stages according to the degree of crown needle discoloration(from fully green to fully gray),and 15 sample trees were selected in total.After felling,the trunk was divided into sections and dissected,and lateral branches were collected from the upper,middle,and lower crown layers.The abundance,developmental stage,and distribution of the two bark beetle species were then systematically surveyed and recorded.[Result]In the early overwintering period,live I.hauseri and Pityogenes spessivtsevi occurred only in early-,mid-,and late-stage damaged trees,whereas none were found in healthy or standing dead trees.Early-stage damaged trees were the principal reservoir of overwintering beetles within the forest.The two species showed marked niche differentiation on infested trees.I.hauseri was concentrated in the middle and lower trunk(4-5 m)and consisted almost entirely of adults.In contrast,Pityogenes spessivtsevi mainly occupied the middle and upper trunk and the lateral branches of the crown.On the trunk,it was concentrated at two height intervals,4-5 m and 10-11 m.Larvae dominated at 4-5 m,whereas adults dominated at 10-11 m and in the lateral branches.[Conclusion]In the early overwintering period,I.hauseri and Pityogenes spessivtsevi were concentrated on damaged trees with pronounced crown discoloration,and the two species showed marked niche differentiation.For managing bark beetle damage during the overwintering period,we recommend using crown discoloration as an indicator and prioritizing the graded,precise removal of early-to late-stage damaged trees.Treatments should be differentiated according to the spatial distribution of the different developmental stages on the trunk and branches,so as to minimize the beetle population base in the following year.关键词
雪岭云杉/天山重齿小蠹/天山星坑小蠹/树冠变色/生态位分化/越冬分布/森林害虫防控Key words
Picea schrenkiana/Ips hauseri/Pityogenes spessivtsevi/crown discoloration/niche differentiation/overwintering distribution/forest pest control分类
农业科技引用本文复制引用
张伟,郭天刚,叶斯波拉提·木哈买提汗,阿地力·沙塔尔,任利利,俞琳锋,焦继鹏..基于树冠变色特征的越冬期雪岭云杉枝干小蠹分布规律及其防控[J].北京林业大学学报,2026,48(9):79-87,9.基金项目
新疆维吾尔自治区重点研发计划(2026B02001). （2026B02001）
