温室盆栽试验结果表明，接种全蚀菌的处理，在小麦出苗后３天，全蚀菌即可侵入根部，引发病症。全蚀菌对扬麦１５８和冀麦５４１８的侵入高峰是一致的，均在小麦出苗后５～１０天，但两者在病害扩展速度上存在明显差异。全蚀菌的侵入部位大多集中在根毛区，少数从根茎侵入。菌丝由根毛区侵入时可产生类似附着胞的结构，其分支产生菌丝。有的菌丝直接从根毛侵入，菌丝在根毛内轴向生长，并在根组织内繁殖蔓延，致根组织细胞瓦解，细胞内容物外溢，在根部导管内形成大量的褐色堵塞物，使水分和营养运行受阻，小麦地上部表现为黄化、矮化和分蘖减少 The results of greenhouse pot experiment showed that inoculation with total eutrophication could cause total erosions to invade the roots 3 days after the emergence of wheat and cause the disease. The total erodent eradication was consistent with the invaded peak of Yangmai 158 and Ji-mai 5418, all of which were in the period of 5 to 10 days after emergence of wheat, but there was a significant difference in disease spreading rate between the two. The total erosive sites are mostly concentrated in the root hair area, a few invaded from the rhizome. Mycelium invaded by the root hair area can produce a similar attachment cell structure, the branches produce mycelium. Some mycelium invades directly from the root hairs, the mycelium grows axially in the root hairs, propagates and spreads in the root tissue, causes the root tissue cells to disintegrate and the cell contents to overflow, forms a large amount of brown blockage in the root conduit, And nutrient operation was blocked, the wheat shoots showed yellowing, dwarfing and tillering reduction