桃树木腐病又称桃树心腐病,是老桃树上普遍发生的一种病害,被害桃树树势衰弱、叶色发黄、早期落叶,严重时全树枯死。发病原因:引发桃树木腐病的病原属担子菌亚门真菌暗黄层孔菌,其子实体(图1~图5)形状不整齐,马蹄形或中央高出呈圆头状;木质坚硬的菌盖表面最初光滑,老熟后稍有裂纹,初生时黄褐色乃至灰褐色,之后变暗褐色至淡黑褐色,边缘钝圆有毛,黄褐色,无裂缝;菌髓带黄褐色。菌管孔口小,圆形或多角形,孔壁稍厚,灰褐色。担子成行排列,顶生4个单胞、球形担孢子。基部深褐色,顶端色淡纺锤形间胞,少量地混生在子实层中。暗黄层孔菌在病部越冬,而在32℃左 Peach tree rot, also known as peach tree heart rot, is a common disease on old peaches, pests damaged trees, leaf color yellow, early deciduous, dead trees in severe cases. The cause of the disease: the pathogen causing peach tree rot is Basidiomycotina subfamily Mycophenolate dysenteriae, its fruiting bodies (Figure 1 to Figure 5) irregularly shaped, horseshoe-shaped or central tall round head; hard woody bacteria Cover the surface of the first smooth, slightly cracked after aging, brown and even taupe at birth, then dark brown to light brown, blunt edge hairy, brown, no cracks; Tube orifice is small, round or polygonal hole wall slightly thicker, brown. Burden in line, top 4 single cells, spherical spores. Base dark brown, apex pale spindle cells, a small amount of mixed in the stratum corneum. Pythium in the disease overwinter, while left at 32 ℃