【摘要】 以郑单958和郑单538为材料,2015年和2016年分别在开封、原阳研究了不同播期对玉米粗缩病发病的影响。结果表明,4月29日至5月29日播种的玉米均有不同程度的粗缩病发生,6月3日后播种的玉米粗缩病发病程度明显降低;两个试点6月3日后播种的玉米株高为203.38~263.03 cm,大部分植株都能正常生长;开封试点6月3日后播种的玉米病株率为0~5.33%,原阳试点6月8日后播种的玉米病株率为1.45%~7.94%。以上数据表明,开封试点6月3日后播种、原阳试点6月8日后播种,可以有效降低玉米粗缩病的发病率,减少产量损失。更多还原

【Abstract】 The effects of different sowing dates on the maize rough dwarf disease occurrence were investigated in Kaifeng and Yuanyang by using Zhengdan958 and Zhengdan538 as materials. The results showed that the maize rough dwarf disease had different levels of occurrence when sowing between April 29 and May 29, the incidence of disease was reduced significantly when sowing after June 3. The plant height was from 203.38 cm to 263.03 cm and most plants could grow normally when the maize was sown after June 3. The disease incidence of maize in Kaifeng was from 0 to 5.33% when sowing after June 3, while the disease incidence of maize in Yuanyang was from 1.45% to 7.94% when sowing after June 8, the above data indicated that sowing after June 3 in Kaifeng and sowing after June 8 in Yuanyang could effectively decrease the incidence rate of the maize rough dwarf disease and reduce the yield loss.更多还原