8 I The Significance of Breeding for Resistance to Diseases and Insect pests抗病虫育种的意义 1. Resistance of Crops to Diseases and Insect Pests (1) Disease and pest damages are popular in Crop Production Maior diseases in the main crops: Rice blast 稻瘟病 Maize leaf blight 玉米叶班病 Wheat rusts 小麦锈病 Rape stem rot 油菜茎腐病(菌核病)§1 The Significance of Breeding for Resistance to Diseases and Insect Pests 抗病虫育种的意义 1. Resistance of Crops to Diseases and Insect Pests (1) Disease and pest damages are popular in Crop Production Major Diseases in the main crops: Rice blast 稻瘟病 Maize leaf blight 玉米叶班病 Wheat rusts 小麦锈病 Rape stem rot 油菜茎腐病（菌核病）