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Position: Home > Articles > THE RELATIONSHIPS BETWEEN INCIDENCE AND SEVERITY OF LEAF RUST, POWDERY MILDEW AND YELLOW RUST OF WHEAT Acta Phytopathologica Sinica 1990 (1)

小麦叶锈病、白粉病和条锈病普遍率与严重度间的关系

作者：

董金琢;曾士迈;马奇祥

单位：

河南农科院植保所博士研究生中国农科院生物技术研究中心;北京农大植保系;北京农业大学植保系

摘要：

在田间接种条件下,详细地观察了小麦叶锈病、白粉病和条锈病普遍率与严重度之间的关系(I—S关系)。结果表明供试三种病害的I—S关系均可用指数函数描述;在普遍率小于70%左右时,用直线方程拟合效果更好;普遍率大于90%时,对严重度的预测效果较差。分别建立了各病的I—S关系式。小麦生育阶段(拔节期、抽穗开花期、灌浆期)对叶锈病和白粉病I—S关系没有明显的影响,而条锈病的I—S关系在不同生育阶段有一定的差异。文章最后对I—S关系的使用进行了讨论。

译名：

THE RELATIONSHIPS BETWEEN INCIDENCE AND SEVERITY OF LEAF RUST, POWDERY MILDEW AND YELLOW RUST OF WHEAT

作者：

Dong Jinzhuo Tseng Shimai (Department of Plant Protection, Beijing Agricultural University) Ma Qixiang (Institute of Plant Protection, Henan Agricultural Academy)

摘要：

The relationships between incidence and severity (I-S) of leaf rust (Puccinia recondita), powdery mildew (Erysiphe graminis) and yellow rust (P. striiformis) were studied throuth inoculation experiments in the field. The results showed that the I-S relationships of these diseases might be described with exponential functions.The I-S relationships also could be described with linear functions when incidence was below 60-70%. I-S relationships were unpredictable when incidences were above 90%. Equations for I-S relationships of the three diseases were built up individually. Wheat growth stages did not affect I-S relationships of leaf rust and powdery mildew evidently, but affected that of yellow rust. It was discussed how to use I-S relationships in disease monitoring.

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小麦叶锈病、白粉病和条锈病普遍率与严重度间的关系

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