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1992～1995年进行了大豆灰斑病田间小区接种试验,获得了病叶率、病荚率、病粒率及大豆产量的系统资料。回归分析结果表明,大豆灰斑病病叶率与病荚率、病粒率之间及病荚率与病粒率之间均呈直线相关;病叶率、病荚率、病粒率与产量损失率之间亦呈直线相关,相关系数均达极显著水平,拟合率在80％以上。协方差分析结果表明,大豆品种的抗病性对这一相关关系有一定的影响。
In 1992-1995, the inoculation experiment of soybean gray spot disease was carried out in the field, and the systematic data of disease leaf rate, disease pod rate, disease grain rate and soybean yield were obtained. Regression analysis showed that there was a linear relationship between leaf spot rate, diseased pod rate and diseased pod rate and diseased pod rate of soybean gray spot disease. The incidences of diseased leaves, pod rate, grain yield and yield The loss rates are also linearly correlated with the correlation coefficients reaching significant levels and the fitting rate is over 80%. Analysis of covariance showed that the disease resistance of soybean cultivars had a certain impact on this relationship.