贵阳市修文县无公害萝卜基地常年种植萝卜1500hm2左右,由于多年连作及品种更新缓慢,导致萝卜霜霉病的危害呈逐年加重趋势,目前田间叶片发病率一般为15%左右,严重的高达50%以上,严重影响了我地萝卜产业可持续发展。为筛选防治萝卜霜霉病高效、低毒、低残留的农药品种,为无公害萝卜生产提供保障,2009年7月,我们开展了不同药剂防治萝卜霜霉病药效试验,现将试验结果总结 Guiyang Xuanwen pollution-free radish base year-round planting radish 1500hm2 or so, due to years of continuous and breed update slowly, resulting in the risk of radish downy mildew showed a trend of increasing year by year, the current incidence of field leaves is generally about 15%, a serious up to 50% Above, it has seriously affected the sustainable development of our radish industry. In order to screen highly efficient, low-toxic and low residual pesticide varieties of radish downy mildew and provide protection for the production of pollution-free radish, in July 2009, we carried out the efficacy test of different medicaments for preventing and treating radish downy mildew, and summarized the test results