论文部分内容阅读
1974年以后,我国广泛采用多菌灵、甲基硫菌灵和苯菌灵等药剂防治甜菜褐斑病,取得了显著成效。但是,自1979年起山东、江苏等甜菜产区,因连年用药一些地区褐斑病产生抗药性、药效下降,防治效果不佳,以致这一药剂无法继续使用。为了确保提高甜菜单产和总产,增加根中含糖,故必须寻求和大力推广应用对甜菜褐斑病防效好和促进产量、含糖率提高的药剂。为此,选用灭病威胶悬剂在甜菜病害上进行了防病试验,现将试验结果整理如下。
After 1974, the widespread use of carbendazim, thiophanate-methyl and benomyl and other agents to control sugar beet leaf spot has achieved remarkable results. However, since 1979, the sugar beet producing areas in Shandong and Jiangsu Province have become resistant to brown spot disease due to successive years of drug use, their efficacy has been deteriorated, and their prevention and treatment effects have been so poor that the medicament can not be used continuously. In order to ensure the improvement of sweetpotato yield and total yield and the increase of sugars in roots, it is necessary to seek and promote the application of agents that are effective against sugar brown spot and promote the yield and the sugar content. To this end, the selection of disease Wei Wei suspension of sugar beet disease disease prevention test, the test results are summarized below.