桃树流胶病在我国南北方均有发生,发病时期多在4—10月份。流胶后树势迅速衰弱,严重时导致早期落叶和枝梢枯死,已成为桃树生产上的重要病害。一、病原及症状桃树流胶病曾一度被认为是由于树体营养失调所致的生理性病害,但近年研究结果以为是一种大茎点属(Macrophoma)的真菌所致,现已在病组织中分离并且回接成功。因此否定了生理性病害的认识。其症状多表现在主干和大枝上,小枝及果实上较为少见。枝干流胶主要从伤口、芽眼及皮孔、皮裂中流出,流胶后枝势减弱以至枯死;果实发病则主要从核附近分泌胶汁,果皮硬化或开裂,食用品质明显下降。枝干发病后,病部隆起呈丘状。解剖可见表皮下有一褐色胶囊;皮层组织变得松弛;形成层由乳白色变为浅黄色;木质部中积有胶液。胶液初流出 Peach gum disease occurred in both northern and southern China, the incidence of more in the 4-10 months. After the plastic flow quickly weakening tree vigor, serious lead to early deciduous and shoots dead, has become an important peach disease. First, the pathogen and symptoms Peach gum disease was once considered to be due to physiological disorders caused by tree dystrophy, but in recent years the results of the study that is a Macrophoma fungi, is now in Sick tissue separation and back to success. So denied the understanding of physiological diseases. The symptoms manifested in the trunk and large branches, twigs and fruits are relatively rare. The branches of the main flow of plastic mainly from the wounds, buds and lenticels, petechia outflow, plastic flow after the branch weakened and even dead; fruit incidence is mainly secreted from the vicinity of the core of plastic juice, peel sclerosis or cracking, eating quality decreased significantly. After the onset of branches, the Ministry of disease was mound hill uplift. Anatomy shows a brown capsule under the epidermis; cortical tissue becomes loose; the formation layer changes from milky white to light yellow; Glue early out