1998年山西省玉米矮花叶病流行原因与防治对策

１９９８年山西省玉米矮花叶病大流行，发病面积近４５万ｈｍ２，约占全省玉米面积的５２％，因病减产５亿ｋｇ。流行区域主要在中部，其中祁县、太谷、榆次３县市病情最重，种子田受害最大。晋中地区制种田６８００ｈｍ２，减产面积占９２％，其中减产５成及５成以上乃至绝产面积就占７５％。根据病害流行学基本原理，结合调查和检测、记录资料，分析了流行原因，提出种子田和大田防治对策。

The Epidemic Cause and Control Strategy of Maize Dwarf Mosaic in 1998

In 1998, maize dwarf mosaic of Shanxi province was epidemic on alarge scale. Area of the disease occurrence was nearly 0.45 million hm 2, which made up about 52% maize area of Shanxi province, and maize output of whole province reduced 5 hundred millions kg. due to the virus disease. Epidemic area was mainly in the middle of Shanxi, among which, Qixian county, Taigu county and Yuci city were most serious regions and maize plants of seed fields were attacked severely. There were 6 800 hm 2 seed fields in Jinzhong prefecture, area of output reduction made up 92% of whole maize area, with area of reducing 50% and over 50% of output and without output making up 75% of whole maize area. Based on the basic principles of epidemiolgy, and conbined with investigation, test and record data, this paper analysed epidemic cause of the disease, put forward control strategy of seed field and production field meanwhile.