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Disease resistance of the seedlings of 59 introduced Populus nigra clones seedlings infected with Marssonina brunnea and Alternaria tenuis were investigated by applying statistical analysis.
对引进的59个欧洲黑杨无性系苗木感染黑斑病和叶枯病进行了调查，应用统计分析的方法对这些无性系抗病性进行了分析。
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