栽培避害对安徽省玉米粗缩病发生的影响

Control of maize rough dwarf disease through regulating maize seeding date in Anhui Province

玉米粗缩病的发生与病毒侵染时玉米植株的生育期关系密切。普通玉米品种6叶龄以下为敏感生育期,6叶龄以上为非敏感生育期。目前生产上种植的杂交玉米适播期较长,如能根据传毒昆虫灰飞虱的消长、传毒规律,合理确定玉米播种期,使玉米敏感生育期最大限度地避开灰飞虱传毒盛期,即可避免或大幅度减轻玉米粗缩病的危害。安徽淮北地区春玉米在4月上中旬、夏玉米在6月中旬播种,玉米粗缩病发生程度轻。因此,上述时间是防治玉米粗缩病的安全播种期。

Occurrence of rough dwarf disease of maize was closely associated with the growth stage of maize during the disease infection.Due to the long suitable date seeding for long scale cultivated hybrid maize varieties,the seeding date could be selected to keep away from infection peak of insect vector-the small brown plant hoppers according to its occurrence and transmission regularity,so as avoid severe damage by RBSDV in Anhui Province.The most suitable seeding date for spring maize is in the first ten and second ten days of April and that for summer maize is in the second ten days of June.