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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。
Between 1992 and 1993, the rhizome of Belgian rhododendron in Yixing City, Jiangsu Province, experienced serious stem-base rot disease and a large number of plants died. Of the 38 isolates obtained from plants and matrices, 14 were Pythium spp., 13 Phytophthoraspp., Pestalotiopsis spp., 3 Penicillium spp., And 1 spine Collectotrichum sp. Among them, only Pythium and Phytophthora have strong virulence. The authors identified species strains RH-1 and RH-3. The results showed that Py.kunmingense and Ph? Citrophthora were the pathogen of Rhizoctonia solani.