【摘要】 2009-2011年连续3年,对不同玉米播期的灰飞虱发生情况、玉米粗缩病发病情况及玉米产量进行了系统调查。结果表明:从4月25日至6月19日每隔5d,连续12次播期的试验区,3年灰飞虱成虫种群的消长动态基本相同,在6月14日达到高峰;4月30日之前和6月19日以后播种,粗缩病发病率明显降低,灰飞虱发生高峰期前播种发病率最高,不适于播种,且在5月20日至5月30日播种玉米产量损失最大。因此,播期是影响玉米粗缩病发生的重要影响因素,适当早播和晚播,避免玉米苗期与一代灰飞虱成虫发生高峰期相遇,可预防玉米粗缩病的爆发。更多还原

【Abstract】 From 2009 to 2011,the occurrence of L.striatellus and maize rough dwarf disease incidence and corn production of different corn sowing period was systematic investigation.The results showed that during 3 years the population dynamics of Laodelphgax striatellus adult was essentially the same from April 25th to June 19th,reaching a peach at June 14th.Before April 30th and after June 19th,the incidence of the maize rough dwarf disease was significantly reduced.The morbidity of maize rough dwarf disease sowing during incident peak of small brown planthopper was the highest,and the losses of corn yield seeding from May 20th to May 30th was the greatest.Therefore,the important factors affecting the occurrence of maize rough dwarf disease is sowing date.It is effective to avoid the peak of mass poisoning meet planthopper by appropriate early sowing or late sowing which can prevent the outbreak of maize rough dwarf disease.更多还原