摘要
本文调查了针叶树苗期病害的种类和苗期病害的发生规律 ,结果表明针叶树苗期病害有 8种 ,其中侵染性病害有 6种 ,生理性病害有 2种。猝倒病是针叶树苗期主要的病害 ,表现为 3种症状类型。日灼型猝倒是气象性病害的主要形式 ,由丝核菌 Rhizoctonia和镰刀菌 Fusarium引起的生物猝倒型和立枯型病害是针叶树育苗的主要病害 ,其发生与育苗地所处的环境、营养土基质有关。
Varieties of disease on conifer seedlings were inv estigated and occurr ence regulation was studied. The results showed that there were 2 kinds of physi olo gical disease and 5 kinds of infecting disease damaging seedlings in Shaanxi reg ion. damping-off is the most serious disease of seedlings in nursery, and coul d b e divided into bud rot, scorch off, pathogical damping off three types. There we re close relations between the occurrence of damping-off and surrounding of se edling plot, nutrition soil.
出处
《陕西林业科技》
2003年第2期48-52,共5页
Shaanxi Forest Science and Technology
基金
国家十五攻关子课题"针叶树主要苗圃病害防治技术研究"(编号 :1 1 - 0 4 )
