【摘要】 药剂防治甜菜褐斑病试验病情调查分级方法 ,采用以株为单位、对小区内除两边行外随机调查60-80株、根据每株病害发生严重程度分0、1、3、5、7、9级的方法进行病情分级调查 ,能够更好地体现出药剂在减轻发病严重程度方面的作用 ,准确地反映药剂防效。统计分析以将病情指数、防效的相应反正弦转换值利用新复级差法进行方差分析为宜更多还原

【Abstract】 The investigating and sorting method of sugarbeet cereospera leaf sport in chemical control trial was studied.Using the single plant as the base,selecting 60～80 plant randomly from inner rows of each plot,and according to the symptom of each plant,divided the disease into 0、 1、 3、 5、 7、 9 grade.The investigating method used in this experment could show the act on of chemical in lighting the disease .Using arcsine value of disease index and control effect and Duncan’s(M.R.T)method for the statisties is suitable in this kind of study.更多还原