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期 刊 ：植物保护学报 1997年

关键词：杜鹃；茎基腐病；病原菌；鉴定；

Keywords:rhododendron, foot rot, pathogens, identification,

摘 要 ：1992～1993年江苏省宜兴市的比利时杜鹃上发生了严重的茎基腐病,大量植株枯死。从植株和基质中获得的38个分离物中,14个为腐霉Pythium spp.,13个疫霉Phytophthoraspp.,7个拟盘多毛孢Pestalotiopsis spp.,3个青霉Penicillium spp.和1个刺盘孢Collectotrichum sp.。其中,只有腐霉和疫霉具有较强的致病力。作者对代表菌株RH-1和RH-3进行了种的鉴定。结果表明,昆明腐霉Py.kunmingense和柑橘褐腐疫霉Ph?citrophthora为杜鹃茎基腐病的致病菌。

Abstract:Rhododendron foot rot was a severe disease in Yixing, Jiangsu Province, in 1992-1993. This disease occurred at both seedling and adult stages. The basic part of the diseased plants showed in cortices the brown lesions that could spread upward to the twigs

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