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大白菜白斑病过去为害不重,但近年来内蒙古东部和西部地区均有日趋严重之势。包头202厂农场247亩连片发生,发病率100%,病情指数42.47%,其中60亩病情指数高达81.23%,减产40%左右。1976、1980年包头农科所先后做了嗪胺灵防治白斑病的系统试验,试验明确嗪胺灵防治白菜白斑病效果优异。嗪胺灵150倍以下对白菜喷雾安全。田间小区浓度对比试验,嗓胺灵300倍,设清水为空白对照,9月1日、10日两次用药,9月20日调查防效表明,可达92,33%。
Occurred in the past, Chinese cabbage white spot disease is not heavy, but in recent years in eastern and western Inner Mongolia are increasingly serious trend. There are 247 mu contiguous occurrences in the farm of Baotou 202 Plant with the incidence of 100% and the disease index of 42.47%, of which the disease index of 60 mu is as high as 81.23% and the yield is reduced by 40%. 1976, 1980, Baotou Agricultural Science Institute has done a systematic test of azadirachtin control white spot disease, test clear amine zinulin effective control of cabbage white spot disease. Zinc Amine 150 times less cabbage spray safety. Comparison of field plot concentration test, 300 times of nephrine, water as a blank control, September 1, 10, twice medication, September 20 investigation showed that the control effect, up to 92,33%.