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玉米粗缩病是一种病毒病,主要由传毒介体灰飞虱传毒引发,发生的轻重与玉米生育期、生态环境、灰飞虱的暴发期、玉米品种的抗病性等因素有关,玉米粗缩病发生危害严重,一般田块减产10%~30%,重发田块几乎绝收,严重影响玉米的生产。而玉米褐斑病主要发生在玉米生长中后期,主要危害玉米叶片,且主要在玉米8~10片叶时易发病,12片叶以后一般不再发病。但在一些感病品种上,褐斑病发生严重,常导致玉米生长前期快速干枯,引起产量损失。
Maize is a kind of virus disease, which is mainly caused by the transmission vector Laodelphax striatellus, the severity of which is related to the growth period of maize, the ecological environment, the outbreak of Laodelphax striatellus and the disease resistance of maize varieties Corn serious disease serious harm, the general reduction of 10% to 30% field plots, field almost reissue yield, seriously affecting the production of corn. The maize leaf spot occurs mainly in the late maize growth, the main damage to maize leaves, and mainly in maize 8 to 10 leaves prone to disease, 12 leaves generally no longer disease. However, in some susceptible varieties, brown spot disease is serious, often leading to rapid dry early corn growth, causing loss of yield.