进入９０年代以来，玉米粗缩病逐渐发展成为渭南市夏玉米主要病害，重发生年份发病面积达到播种面积６０％以上，重发田块病株率达８０％以上，甚至造成翻犁毁种。目前生产上主要通过调整播期预防病害发生。从１９９５年起，笔者在玉米适期播种基础上，推广了玉米播期药剂... Since the 1990s, maize sicken has gradually developed into the main disease of summer maize in Weinan City. The incidence of serious maize diseases reached over 60% of the sown area in the year of recurrence, and the rate of diseased plants in the re-emergence field reached more than 80%. The current production mainly by adjusting the sowing date to prevent disease. From 1995 onwards, the author sowing corn on the basis of the appropriate, to promote sowing sowing agent ...