对酶活性与田间感病指数作相关分析，发现SOD和POD活性与田间发病指数存在明显的正相关关系。
For the same variety, the SOD and POD activity was positively correlated with the field disease-infected index.
根据感病损失量方程，病情很轻时损失甚微，经相对误差限法分析，将病情指数26定为该病的发生指标。
The developmental threshold was fixed at 26 of disease index based on the relative error margin analysis.
根据感病损失量方程，病情很轻时损失甚微，经相对误差限法分析，将病情指数26定为该病的发生指标。
The developmental threshold was fixed at 26 of disease index based on the relative error margin analysis.
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