一、小麦条锈病1.为害症状。小麦条锈病菌主要为害小麦的叶片,也可为害叶鞘、茎秆和穗部。小麦感病后,初呈退绿色的斑点,后形成鲜黄色的粉疮(即夏孢子堆)。夏孢子堆较小,长椭圆形,在叶片上排列成条状,与叶脉平行。严重发生时引起小麦叶片干枯,造成小麦减产,品质下降。2.防治方法。(1)选用抗病品种选用抗病丰产良种。(2)消灭当地早期菌源。(3)加强栽培管理在秋苗容易发病的地区,应避免过早播种;合理施肥,避 First, wheat stripe rust 1. Harmful symptoms. Wheat stripe rust mainly wheat leaves, but also damage leaf sheaths, stalks and spikes. After the wheat is infected, it presents a greenish spot at first, and then forms a bright yellow pink sore (ie, a summer spore pile). Summer spore reactor smaller, oblong, arranged in a strip on the leaves, parallel with the veins. Severe occurrence of wheat leaves caused by dry, resulting in wheat yield, quality decline. 2. Prevention methods. (1) selection of resistant varieties selection disease-resistant varieties. (2) Eliminate the local early source of bacteria. (3) to strengthen the cultivation and management In the autumn seedlings prone areas, should avoid premature sowing; reasonable fertilization, avoid