我省为害油菜普遍而严重的病虫害有菌核病、病毒病、霜霉病、白锈病、蚜虫和潜叶蝇。此外,黑斑病、白斑病、菜青虫,黄条跳(虫甲)和猿叶虫在局部地区也时有发生。几种病虫的识别一、油菜菌核病 茎秆发病,初呈褐色水渍状病斑,后变灰白色。湿度大时,病部软腐,表面生有白色絮状的霉层;干燥时,病部干缩,病茎表面纤维破裂如麻,致使病部以上植株枯死,易折断。撕裂病茎,可见到黑色鼠粪状的颗粒,即病菌的菌核。高湿条件下,病茎表面也能形成菌核。叶上发病,多从叶缘开始,初呈园形或不规则形水渍状青褐色病斑,周缘叶色变黄。高湿时病叶上可产生白色霉层,最后全叶枯死脱落。花器受害,花瓣变色极易脱落。荚果受害,变为白色,籽粒霉烂或成为瘪粒,荚果内可见到比油 The common and serious pests of rape in our province are sclerotinosis, viral diseases, downy mildew, white rust, aphids and leaf miner. In addition, black spot, vitiligo, Pieris rapae, skipjaw (pest) and vermin are also occurring in some areas. Identification of several pests First, rape sclerotiorrhizae stalk incidence, brown stains were brown spot-like, after the gray. Humidity, the Ministry of soft rot, the surface was born with white flocculent mildew layer; dry, diseased stem shrinkage, sick stem surface fiber rupture, such as hemp, resulting in the diseased part of the plant dead, easy to break. Tear the diseased stem, you can see black rat feces-like particles, that is, bacteria sclerotia. Under high humidity conditions, the sclerotial surface can also form sclerotia. The incidence of leaves, many from the leaf margin began to take the shape of a garden or irregular water-like green brown spot, the peripheral leaf color turns yellow. When the leaves are wet and can produce white mold layer, finally the whole leaves died. Flower damage, petal color easily fall off. The pod harms and turns white, the kernel rots or becomes deflated, and the pod can see a bitter oil