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甜菜褐斑病为真菌性病害(Cercospora beticola sacc)是甜菜产区的主要病害之一。山东省春夏播甜菜以及采种田皆发生为害,造成采种减产5—20%,甜菜块根减产10—30%,含糖率降低1—4%。我省从1974年开始进行试验和应用甲基托布津、多菌灵等药剂防治褐斑病收到显著成效。但由于连年推广应用,很快形成了抗药性,到1979年基本失去了防病能力。因此从1980年开始搜集国内外杀菌剂进行试验,以筛选有效药剂。
Beetle leaf spot is a fungal disease (Cercospora beticola sacc) is one of the main diseases in sugarbeet producing area. Spring and summer sowing of beet and farming in Shandong Province all occurred damage, resulting in cut 5-20% of seed production, sugar beet root yield reduction of 10-30%, 1-4% lower sugar content. Since 1974, our province began to test and apply methyl thiophanate, carbendazim and other agents to control brown spot disease have received remarkable results. However, due to the popularization and application in successive years, the drug resistance soon formed. By 1979, the disease prevention ability was basically lost. Therefore, from 1980 to collect domestic and foreign fungicides for testing, in order to screen effective agents.