---

期 刊 ：植物保护学报 1993年

关键词：稻瘟病；普遍率；严重度；

Keywords:rice leaf blast, rice neck blast, incidence-severity relationship,

摘 要 ：作者对田间自然发病情况的观察和盔栽接种试验,获得92组叶稻瘟和80组穗颈稻瘟普遍率和严重度间对应关系的数据,在计算机上分别分析了叶瘟和穗颈瘟普遍率与严重度之间的关系(I-S)。结果表明:叶瘟I-S关系和穗颈瘟I-S关系均可用直线方程描述,其直线回归方程为:叶瘟:SL=-1.104+0.455IL(SL,IL——叶瘟严重度和普遍率)穗颈瘟:SE=-3.717+0.737IE(SE,IE——穗颈瘟严重度和普遍率)协方差分析结果表明:水稻品种的抗病性对稻瘟病 I-S 关系有一定影响。

Abstract:The information of incidence and disease index of leaf and neck riceblast(Pyricularia oryzae Cav.)were obtained through spontaneous in-fection in the field and inoculated experiments in the pot.The relation-ship between disease incidence and severity(I-S)

---