油麦菜苗期感染灰霉病后,受害茎叶呈水渍状腐烂;成株染病后,发病始于近地表的叶片,初呈水渍状,后迅速扩大,茎基腐烂,疱面上生出灰褐或灰绿色霉层。天气干燥时,病株逐渐干枯死亡,霉层由白变灰再变绿;湿度大时,病株从基部向上溃烂,叶柄呈深褐色。留种株花器或花柄受害后呈水渍状腐烂。防治该病可采取以下措施:一是在收获后及时集中烧毁或深埋病残体,减少菌源。二是加强管理,增强抗病力。三是药剂防治。若是棚室栽培,可喷撒6.5%甲硫·霉威或5%春雷王铜粉尘剂,每次每667平方米 After infected with Botrytis cinerea, the infected stems and leaves showed water-stain rot. After the adult plants became infected, the disease started to appear near the surface of the leaves. Gray-green moldy layer. When the weather is dry, the diseased plants gradually die down, the mildew changes from white to gray and then turns green; when the humidity is high, the diseased plants ulcerate upward from the base and the petiole is dark brown. After leaving the plant flower or flower stalk damage was water-like rot. Prevention and treatment of the disease can take the following measures: First, promptly concentrated after harvest burned or buried disease, reduce bacteria sources. The second is to strengthen management and enhance disease resistance. Third, pharmaceutical control. If the studio cultivation, can be sprayed 6.5% methimazole or 5% Chunlei copper dust agent, every 667 square meters