杉苗矮化线虫病的症状及病原形态观察

• 作 者: 傅瑞树 廖国华 林国清 蒋娟娟
• 机 构: 福建三明市林科所,福建三明市林科所,福建三明市林科所,福建三明市林科所
• 出 处: 福建林学院学报
• 发表日期: 1992年03期
• 关键词: 形态观察 生长衰退 病原线虫 Cunninghamia 根围 形态特征 根际土壤 衰退病 病原鉴定 植物寄生线虫

本文首次报道了在三明市杉木苗圃中由矮化线虫（Tylenchorhynchussp.）引起的杉木苗（Cunninghamia Lanceolafa）衰退病,描述了病害的症状和病原线虫形态特征。在发病杉苗的根部和根围土壤中可发现许多矮化线虫。杉苗受侵后地上部生长衰退、矮化和黄化,根系生长不良,侧根少,根尖肿大,形成粗短根和丛生根系。

This paper, for the first time, reports the decline of Cunninghamia Lanceolafa caused by dwarfism nematode (Tylenchorhynchussp.) In the Chinese fir nursery in Sanming and describes the symptoms of the disease and the morphological features of pathogenic nematodes. Many dwarfing nematodes can be found in the roots and rhizosphere soil of the seedling. After the seedlings invaded Cunninghamia lanceolata, the shoot growth declined, dwarfed and yellowed, the root growth was poor, the number of lateral roots was small, and the root tips were swollen to form stubble roots and clusters of roots.