松墨天牛在秦巴林区不同寄主上的危害规律研究
The damage of Monochamus alternatus on different host pine species in Qinling-Daba Mountains
投稿时间:2021-08-27  修订日期:2021-10-08
DOI:
中文关键词:  松墨天牛  油松  华山松  马尾松  空间分布  松材线虫病
英文关键词:Monochamus alternatus  Pinus tabuliformis  P. armandii  P. massoniana  Spatial distribution  Pine wilt disease
基金项目:
作者单位地址
南俊科 西北农林科技大学植物保护学院 陕西杨凌西北农林科技大学植物保护学院
杨越翔 西北农林科技大学林学院 
张玲华 西北农林科技大学林学院 
李鹏飞 陕西省森林病虫害防治检疫总站 
郭丽洁 陕西省森林病虫害防治检疫总站 
贺虹 西北农林科技大学林学院 陕西杨凌西北农林科技大学林学院森林保护系
魏琮 西北农林科技大学植物保护学院 陕西杨凌西北农林科技大学植物保护学院
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中文摘要:
      为了廓清松材线虫的主要传播媒介昆虫松墨天牛在秦巴林区不同寄主上的空间分布和危害规律,本研究对该林区遭受松材线虫病严重危害的3种主要松树(油松、华山松和马尾松)进行了冬季野外解析,并在统计不同胸径、不同高度树干上松墨天牛侵入孔、幼虫数量等基础上,结合聚集度指标分析方法,对松墨天牛在不同寄主上的危害差异进行了比较研究。结果表明,该害虫在三种寄主上的危害程度具有显著差异,以华山松受害最重,其次为马尾松和油松;松墨天牛越冬幼虫在油松上主要危害皮下1~2 cm的边材;在华山松和马尾松上分布比较多样,以髓心部位危害最重,其后依次为心材、边材和树皮;在油松和华山松上,松墨天牛主要在0~7 m主干上危害,而在马尾松上主要危害树干7 m以上部分,且均与寄主胸径呈显著正相关;松墨天牛侵入孔和越冬幼虫在不同寄主树干上均呈聚集性分布。本研究揭示了松墨天牛在秦巴林区三种主要寄主上的危害规律,对于进一步开展大尺度地理范围松墨天牛的寄主选择性及危害规律研究提供了基础信息,也为对秦巴林区松墨天牛的有效防治和松材线虫病的蔓延控制提供新的重要信息。
英文摘要:
      In order to clarify the spatial distribution and damage regulation of the vector sawyer beetle Monochamus alternatus of the pine wood nematodes on different pine trees in the Qinling-Daba Mountains, China, the number of entrance holes and the population of overwintering larvae of M. alternatus in the trunk of three pine species (Pinus tabulaeformis, P. armandii and P. massoniana) were investigated, and their corelations to the diameter at breast height (DBH) and the height of damaged site on the trunk above the ground were calculated, also combined with the aggregation index analysis method, aiming to reveal the difference of damage of M. alternatus to different host tree species. The results show that the damage degree of this pest to the three pine tree species are significantly different, among which the damage to P. armandii is most servere, followed by that to P. massoniana and P. tabulaeformis subsequently. The overwintering larvae of M. alternatus damage P. tabulaeformis mainly in the sapwood about 1~2 cm underneath the bark. Whereas, in both P. armandii and P. massoniana the overwintering larvae damage the pith most serverely, followed by the heartwood, sapwood and the bark subsequently. In P. tabulaeformis and P. armandii, the larvae of M. alternatus mainly distribute in the trunk where the height of the damaged site is usually less than 7 m above the ground. However, the larvae damage P. massoniana mainly in the trunk where the height of the damaged site is usually higher than 7 m above the ground. The number of entrance holes and the number of overwintering larvae are significantly, positively correlated with DBH. The entrance holes and overwintering larvae of M. alternatus on different host pine trees are aggregated. The damage regulation of M. alternatus to different hosts in the Qinling-Daba Mountains provides information to future studies of host selection of this pest and its damage machenism in large-scale geographic petterns, which are helpful to controll this vector sawyer beetle and of the related pine wilt disease in the Dinling-Daba Mountains.
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