一、小麦病虫害的主要种类1.小麦锈病:小麦锈病分为条锈、叶锈、秆锈三种。小麦锈病是典型的高空、气传病害。多雨、多雾或结露条件下,病害发生重。2.小麦纹枯病:小麦发病后,叶鞘、茎秆组织坏死,轻病株穗小粒秕,重病株不能抽穗或形成枯株白穗。冬春气温偏高,雨水偏多,利于纹枯病的发生流行。3.小麦白粉病:以叶片受害为主。病斑多出现于叶片正面,严重时病斑汇合成片,使叶片提早干枯,导致穗小秕粒。4.小麦全蚀病:幼苗发病,根和根茎呈黑色,病苗矮化,底叶发黄;拔节期,根部变黑加重,茎基 First, the main types of wheat pests and diseases 1 wheat rust: wheat rust is divided into strip rust, leaf rust, stalk rust three. Wheat rust is a typical high altitude, airborne disease. Rainy, foggy or condensation conditions, the disease occurred heavy. 2. Wheat sheath blight: After the onset of wheat, leaf sheath, stalk tissue necrosis, light plant spike small grains, heavy strains can not be heading or forming dry white spike. Winter and spring temperatures are high, rain more, conducive to the occurrence of sheath blight epidemic. 3. Wheat powdery mildew: the main victims of leaves. Lesions appear more in the front of the leaves, serious lesions merged into pieces, so that the leaves dry early, resulting in spikelets small grains. 4. Wheat eclipse disease: the incidence of seedlings, roots and rhizomes black, sick dwarf, yellow leaves; jointing stage, the roots darker, stem base