【摘要】 :1999年一种玉米“新病害”在贵州省大方等县爆发流行。为了给防治此害提供理论依据 ,通过借助国内外报道过的有关资料 ,对此病进行了诊断。诊断结果为玉米鼠耳病。并在发病重的地域进行了发病因素调查。调查结果为 :(1)玉米品种间存在着抗病性差异 ;(2 )玉米与小麦套种的地块发病重 ;(3)同一乡 (镇 )内低海拔地区发病早而重 ;(4 )玉米地周围杂草多发病重 ;(5)播种期适当提早并加盖地膜的发病轻。根据发病因素 ,提出了防治意见更多还原

【Abstract】 During May and June 1999,a‘new disease’ occurred abruptly and spread at an amazing speed in Dafang county, Guizhou province(and later in counties around Dafang).In order to control the disease, a survey was conducted in areas where suffered from the disease seriously, then searched for domestic and abroad materials concerning the symptom and finally made a diagnosis that the disease was MWEV. The survey indicates:(1)MWEV resistance is different between various strains of maize.(2)MWEV occurs at a higher rate in a maize and wheat alternating fields.(3)MWEV appears relatively earlier and is more harmful at lower altitude area.(4)More weeds around field lead to higher rate of MWEV accordingly.(5)MWEV occurs at a lower rate in plastic film covered fields.And corresponding protecting methods of MWEV are given in the paper as well.更多还原