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在城市,无论公园还是街道、单位,常以大叶黄杨(Euonymus japonicum Thunb)作绿篱或观赏植物种植。但由于白粉病、疮痂病的危害,使植株生长衰弱或叶片大量脱落,严重的影响了大叶黄杨的观赏价值。为了增强大叶黄杨的社会效益和经济效益,我们于1985年至1987年对大叶黄杨白粉病(Oidium euonymi-japonici(Are)Sacca-rdo)及疮痂病(Collototrichum sp.)的发生及防治进行了专题研究,现将初步结果总结报道如下。大叶黄杨白粉病1.症状观察发病初在叶上出现一黄斑,逐渐在其上产生白粉层,病斑圆形,许
In the city, whether in parks or in the streets, units are often planted with hedges or ornamental plants by Euonymus japonicum Thunb. However, due to powdery mildew, scab disease hazards, poor plant growth or a large number of leaves off, seriously affecting the ornamental value of Euonymus japonicus. In order to enhance the social and economic benefits of Eupatorium yunnanensis, we conducted the research on the occurrence and control of Oidium euonymi-japonici (Are) Sacca-rdo and Collototrichum sp. From 1985 to 1987 Thematic studies, the preliminary results are summarized below report. Euonymus japonicus powdery mildew 1. Symptoms observed early onset of a macula in the leaves, and gradually produce white powder layer on it, the lesion is round, Xu