梨胶锈菌的重寄生菌研究重寄生菌的越冬，传播及侵入ＳｔｕｄｉｅｓｏｎｔｈｅＨｙｐｅｒｐａｒａｓｉｔｅｏｆＰｅａｒＧａｌｌＲｕｓｔＰａｔｈｏｇｅｎⅣＯｖｅｒｗｉｎｔｅｒ，ＤｉｓｓｍｉｎａｔｉｏｎａｎｄＥｎｔｒｙｏｆｔｈｅＨｙｐｅｒｐａｒａｓｉｔｅ黄云，曹... Studies on the parasitism of peat gum rust Studies on the overwintering, spreading and invasion of the parasite bacteria Studies in the Hyperparasite of PearGall Rust Pathogen IV Overwinter, Dissolution and Entry of the Hyperparasite