此病系一种危险性枝干病害,经分离鉴定其病原为榆壳二孢。在昌图县此病侵染期为4—8月末,以7月下旬为主。病菌分生孢子靠雨水飞溅向四周传播扩散,从伤口侵染寄主。通过药剂防治试验筛选出5种杀菌剂防治效果较好,其中以70%甲基托布津和721神农液防效更好,且成本低,适于大面积推广应用。 The disease is a dangerous branch disease, isolated and identified as the pathogen Elsium spores. In Changtu County, the infection period is from the end of April to August, mainly in late July. Spores of germs spread by spreading around the splashes of rainwater, infecting the host from the wounds. Through the chemical control test, five kinds of fungicides were screened out, and the control effect was better with 70% thiophanate-methyl and 721 Shennong liquid, and the cost was low, which was suitable for large-scale popularization and application.