1危害症状桃树流胶病主要危害桃树主干和主枝,主干重于枝条,小枝条和果实也可被害。发病初期,病部稍微肿胀,木质部变褐色,不断从皮孔或伤口处分泌出半透明柔软胶状物,尤其雨后流胶现象更为严重。流出的胶状物与空气接触后,逐渐变褐,成为晶莹柔软的冻胶块,干燥后变成褐色硬质胶块。多个流胶块连接在一起,形 1 Harmful symptoms Peach gum disease main pests main trunk and main branches, the trunk heavier than the branches, twigs and fruits can also be victimized. Early onset, the disease slightly swollen, xylem brown, constantly from the skin or wound secreted semitransparent soft jelly, especially the phenomenon of plastic flow more serious after the rain. Out of the jelly and air contact, gradually brown, become a soft jelly crystal block, after drying into a brown hard plastic block. Multiple flow plastic blocks connected together, shaped