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由于大棚蔬菜栽培的特殊环境,使蔬菜病害发生的种类、数量及危害程度明显增加。如何准确地识别多种蔬菜的病害,这是进行有效防治的前提。只有广大菜农对病虫害有了正确的识别和鉴别能力,才会进行有效地防治。一、病害的识别 (一)病害类型病害是在蔬菜生长或贮运过程中出现的不正常现象。其类型可分为真菌、细菌、病毒、根线虫等病害。 (二)识别病害的依据依据蔬菜表现的不正常症状,包括病状和病征两部分。根据病状即蔬菜本身的不正常表现识别:(1)畸形:如番茄、辣椒病毒病造成叶片变形、蕨叶等;(2)萎蔫:如枯萎病;(3)腐烂:如大白菜软腐病。根据病征来识别:依据病部的霉状物、粉状物、锈状物、菌核等来识别真菌性病害;根据病部有无溢脓、恶嗅来识别是否细菌性病害。二、蔬菜病害的防治识别病害种类后,根据不同病菌发生的规律,以
Due to the special environment of greenhouse vegetable cultivation, the types, quantities and hazards of vegetable diseases are obviously increased. How to accurately identify a variety of vegetable diseases, which is the prerequisite for effective prevention and treatment. Only the majority of vegetable farmers have the correct identification and identification of pests and diseases, will be effective prevention and treatment. First, the identification of disease (a) the type of disease is the disease in the growth or storage of vegetables appear abnormal phenomenon. Its type can be divided into fungi, bacteria, viruses, root worms and other diseases. (B) to identify the basis for the disease based on abnormal symptoms of vegetables, including symptoms and signs of two parts. According to the symptoms that the vegetable itself is abnormal performance identification: (1) deformity: such as tomato, pepper virus disease caused by leaf deformation, fern leaves, etc .; (2) wilting: such as blight; . According to the symptoms to identify: According to the disease moldy material, powder, rust, sclerotiorin to identify fungal diseases; according to whether the disease pus, evil smell to identify whether bacterial diseases. Second, the prevention and treatment of vegetable diseases Identify the types of diseases, according to the law of occurrence of different bacteria to