在查阅和审改植病方面的农业科技论文时,我们经常发现部分作者在病情指数的计算和表示方法上有误。如“播期为7月20日,8月6日,病情指数分别为60.6％、22.8％等等,给病情指数多加了“％”,其实从病情指数的概念到计算公式均与“％”无关。病情指数(disease index缩写为DI)又叫发病指数、感染指数。它与发病率一样是表示发病程度的一种方法,但二者又有不同。发病率是指一个群体中发病的多少,用 When reviewing and reviewing agricultural science and technology papers on plant diseases, we often find that some authors have made mistakes in the calculation and presentation of the disease index. Such as “sowing date of July 20, August 6, the disease index were 60.6%, 22.8%, etc., to the disease index increased by”% “, in fact, from the concept of the disease index to the formula are”% " Irrelevant disease index (disease index abbreviated as DI), also known as the index of disease, infection index, which is the same as the incidence of disease is a means of indicating the extent of the disease, but the two are different.The incidence is the incidence of a group of how much ,use