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配对芽虫控制和最小的地下干扰:北极森林中Btk喷频率的影响

Mathilde Robitaille¹, David Pothier², Stéphanie Pellerin^1,3

¹Institut de Recherche en Biologie Végétale, Département de Sciences Biologiques Université de Montréal Montréal Canada.

Ecology and evolution

|March 2, 2026

概括

减少Bacillus thuringiensis israelensis (Btk) 喷频率以控制杉虫 (SBW) 通过增加光线可用性,有利于底层植被. 两年一次的应用有效地管理脱叶,同时保持植物多样性.

科学领域:

林业林业林业林业林业
生态生态学生态生态学
昆虫学昆虫学是一门学科.

背景情况:

加拿大森林有广泛的Btk对抗杉虫 (SBW) 的治疗方法.
地下植被影响北极森林的生物多样性和野生动物息地.
之前的研究还没有完全评估Btk对地下植物群落的影响.

研究的目的:

评估不同频率的Btk喷对底层植被的影响.
确定最佳的Btk应用策略,平衡害虫控制和生态系统健康.

主要方法:

实验设计于2007年建立,数据将在2022年收集.
测试了不同的Btk喷频率 (每年或每两年).
监测树木脱叶,地下植物群落和树木.

主要成果:

减少喷频率增加了地下室灯光的可用性.
观察到较高的血管植物丰富度,灌木覆盖和不耐阴影的物种,喷频率较低.
两年一度的Btk应用保持了树冠关闭和有限的转向早期顺序植被的转移,树木生物量没有变化.

结论:

两年一度的Btk喷足以控制SBW脱叶,同时最大限度地减少对底层植被的负面影响.
不太频繁的喷支持更大的底层植物多样性和水果生产.
优化Btk应用频率是可持续森林管理的关键.

关键词:

细菌 thuringiensis 这种疾病.树木上的柳.喷雾操作是喷雾的操作.杉芽虫杉芽虫是一种低树林植被低树林植被

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