【作者】 刘华林； 刘梦泽；

【Author】 Liu Hualin Liu Mengze (Plant Protection Station of xiaogan city, Hubei 432100)

【机构】 湖北省孝感市植保站；

【摘要】 经田间试验对2种严重度分级方法进行比较,结果表明,以叶片为单位的病情记载方法虽比以整株发病情况判定病情的方法费工,但更能反映田间发病实际情况。在小麦灌浆期,病情指数≥60为大发生程度,损失率≥10%;病情指数30-40为中等发生,损失率为4%～6%;病情指数≤10为轻发生,损失率≤2%。更多还原

【Abstract】 In several researches and experiences had been done, two divide methods of severity had been compared, it shows that method Ⅱ is more complicated than method Ⅰ, but it approached to the actual situation of the field. When wheat was in the milk stage, if the disease, index of the wheat powdery mildew were 60 or more, the disease would outbreak seriously and the loss rate would be 10% or more, if the disease index were between 30-40, the disease would outbreak moderately and the loss rate would be at 4% - 6% and if the disease index were 10 or less, the disease would occur slightly and the loss rate would be 2% or less.更多还原