【摘要】 通过小麦用药、小麦和玉米均用药、玉米用药 3种不同用药方式防治灰飞虱和玉米粗缩病的试验 (各用药方式之间差异达极显著水平 )表明 ,在小麦玉米轮作区 ,小麦和玉米田均用药是最佳的防治措施。更多还原

【Abstract】 The results of field experiment of controlling small brown back planthhopper and maize rough dwarf virus by the methods of applying chemicals only on wheat, both on wheat and maize and only on maize showed that the three different ways of applying chemicals were markedly different, and both on wheat and maize was the best measure in the totation area of wheat and maize.更多还原