晋南玉米粗缩病流行原因调查与分析

An Investigation and Analysis on the Cause of the Epidemic of Maize Rough Dwarf

玉米粗缩病是一种由飞虱传播的病毒病，过去在山西省玉米生产上不形成为害，１９９２年在运城地区局部发生，１９９３年起大面积流行，减产严重。经过３年调查，初步总结出粗缩病在晋南的发生规律，分析了其流行的主要原因，根据发病特点、提出加强研究、调整播期、清除杂草和药剂拌种４项防治建议。

Maize rough dwarf did not lead to the damage on the maize production in the past in Shanxi province,which is a virus disease spred by plant hopper. This disease occured in some part of Yuncheng perfecture in 1992 and was common in a large area in 1993,which led to a serious decrease of yield. Through three years investigation,we summed up the occurrence regularity of maize rough dwarf in south Shanxi,analysed the main cause of its epidemic and presented four control suggestions according the access features as enhancing study, adjusting the date of seeding,removing weeds and dressing seed with pharmaceuticsal product.