小麦条锈病(Puccinia striiformis f.sp.tritici,Pst)和小麦白粉病(Blumeria graminis f.sp.tritici,Bgt)是我国小麦生产上的重要病害。条锈病主要发生在西北、华北、长江中下游和西南各省、自治区;白粉病则在西南各省和河南、山东、湖北、江苏、安徽等省发生较重,且西北、东北麦区也日趋严重[1]。条锈病菌依靠夏孢子造成小麦初侵染和再侵染并随气流远距离传播导致大区流行,白粉病菌则依赖于分生孢子或子囊孢子进行初侵染和再侵染。二者作为典型的气传病害,空中的接种体在 Puccinia striiformis f.sp. tritici (Pst) and wheat powdery mildew (Blumeria graminis f.sp. tritici, Bgt) are important diseases in wheat production in China. Stripe rust mainly occurs in the northwest, north China, the middle and lower reaches of the Yangtze River and the provinces and autonomous regions in the southwest of China. Powdery mildew occurs more frequently in the provinces of southwestern China, Shandong, Hubei, Jiangsu and Anhui provinces, 1]. Stripe rust bacteria rely on the summer spores caused by early infection and re-infection of wheat and spread with the long-distance airflow led to the epidemic, powdery mildew bacteria are dependent on conidia or ascospores of the initial infection and re-infection. Both as a typical airborne disease, aerial inoculum in