在油菜栽培中,有几种病害如病毒病、菌核病等已引起人们的重视,而对其他一些病害却了解不多,一旦发生往往不知所措,甚至连发病后的症状都很难区分,造成防治的失误,现将易被忽视的几种油菜病害介绍如下:霜霉病油菜霜霉病是油菜生产上的一种比较常见的病害,在整个油菜生育期都会发生,导致叶片枯死,花序肥肿畸形,不能结实或结实不良,该病由霜霉病菌侵染所致。油菜苗期至开花结角期均可发生,主要危害叶、茎、花和角果。发病初期叶片上出现淡黄色斑 In rapeseed cultivation, there are several diseases such as viral diseases, Sclerotinia have attracted people’s attention, while others do not know much about the disease, in the event often do not know what to do, even after the onset of the symptoms are difficult to distinguish , Resulting in prevention and control of mistakes are now overlooked several rape diseases are as follows: Downy mildew Downy mildew is a rapeseed production of a more common disease, will occur throughout the rape growth period, leading to dead leaves, Inflorescence deformity, can not be strong or bad fruiting, the disease caused by downy mildew infection. Rape seedlings to the flowering node can occur, the main hazards of leaves, stems, flowers and fruit. The early onset of yellowish yellow spots on the leaves