苹果树腐烂病是我国北方苹果产区的重要病害，东北、华北地区的各省份都有发生。７０年代华北果区遭受低温危害，苹果树腐烂病发生严重。多年来，各地对此病开展了积极的防治研究，虽然取得显著成效，但目前发病仍很普遍。天津市各郊区县共有苹果园１．３万公顷，近几年来发病 Apple tree rot disease is an important disease in the northern part of the apple producing area in northeastern China and other provinces in North China. In the 1970s, the northern part of North China suffered low temperature damage and apple tree rot disease was serious. Over the years, various localities have carried out active prevention and treatment researches on this disease. Although remarkable achievements have been made, the incidence is still very common at present. All suburb counties in Tianjin have 13,000 hectares of apple orchards and have been affected in recent years