Abstract:

The powdery mildew disease of apple is one of the important diseases, which had serious influence on apple. In this study, the author studied resistance of 10 different varieties of apple by spraying ascospores of apple powdery mildew. The results showed that Jiguan, Zaogala, American 8, Fuhuapi and Huahong had higher resistance, Xinnonghong, Fuji, Qinyang and Guoguang were easily infected, and compared with mature leaves, young leaves were more easily infected. The study provided an important basis for the mechanism of resistance to powdery mildew and cultivating new disease-resistant varieties.