| 稻瘟病普遍率与严重度关系初步探讨 |
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| 引用本文： | 黄春艳,商世吉.稻瘟病普遍率与严重度关系初步探讨[J].植物保护学报,1993,20(3):237-240. |
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| 作者姓名： | 黄春艳 商世吉 |
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| 作者单位： | 黑龙江省农科院植保所 哈尔滨 |
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| 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。
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| 关 键 词： | 稻瘟病 普遍率 严重度 |
A PRELIMINARY INQUIRE INTO RELATIONSHIP BETWEEN INCIDENCE AND SEVERITY OF RICE BLAST |
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| Huang Chunyan and Shang Shiji.A PRELIMINARY INQUIRE INTO RELATIONSHIP BETWEEN INCIDENCE AND SEVERITY OF RICE BLAST[J].Acta Phytophylacica Sinica,1993,20(3):237-240. |
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| Authors: | Huang Chunyan and Shang Shiji |
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| Institution: | Institute of Plant Protection Heilongjiang Agricultural Academy, Harbin and Institute of Plant Protection Heilongjiang Agricultural Academy, Harbin |
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| 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)of leaf blast and neckblast was analyzed on the computer respectively.Results showed thatthe I-S relationship of leaf blast and neck blast could be expressed ind-ividually by following linear equations:SL=-1.104+0.455IL(R=0,9480~(**),S.D.=2.8456)and SE=-3.717+0.737 IE(R=0.9412~(**),S.D.=6.1555).The I-S relationship of rice blast was affected by the resistance of ricevarieties to the disease. |
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| Keywords: | rice leaf blast rice neck blast incidence-severity relationship |
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