玉米粗缩病是由灰飞虱传播的病毒病害。该病70年代中期首先在河北省中南部流行。此后得到逐步控制。但自1993年以来,多年已控制危害的粗缩病又逐步回升,此病现已波及到山西、河北、山东、天津、北京等省、市。近年来由零星发生到大面积发生曼延,速度之快,对产量影响之大,超过任何一种玉米病害,应引起高度重视。 Corn maize disease is a virus disease transmitted by the Laodelphax striatellus. The disease in the mid 70s first epidemic in central and southern Hebei Province. Since then get step by step control. However, since 1993, the disease that has been in control for many years has gradually risen and the disease has now spread to provinces and cities such as Shanxi, Hebei, Shandong, Tianjin and Beijing. In recent years, sporadic occurrences occur to a large area Man Yan, the speed is fast, the impact on the output of large, more than any kind of maize diseases, should be highly valued.