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通过罩笼接虫和自然开放式状态下试验 ,对不同播期的玉米粗缩病病情进行了比较 ,明确了玉米敏感叶龄为可见叶 9叶以下 ,展开叶为 6叶以下。研究证实 ,将田间灰飞虱转移迁入高峰期与玉米敏感叶龄期错开 ,可以减轻玉米粗缩病的发病 ,春玉米播期 4月 10～ 15日 ,夏玉米在 6月 10～ 15日 ,能显著控制玉米粗缩病的危害。
Through the cage cage and natural open state test, the different sowing dates of maize disease were compared, clear corn sensitive leaf age is visible leaf 9 leaves below, the expansion of leaves is less than 6 leaves. The study confirmed that the transfer of Laodelphax striatellus in the field staggered away from the sensitive leaf stage of corn can reduce the incidence of maize sowing disease. Spring maize sowing April 10-15, summer maize in June 10 ~ 15 , Can significantly control the harm of maize rough.