蔬菜苗期沤根病是一种生理性病害，大多由于管理不当引起。初发时根病发锈，严重时根部表现腐烂，不长新根，幼苗变黄萎蔫，后期全部死亡。防治措施一般应注意四点： 一、保持适当温度 床土配制要合理，播后至苗期应保证足够的土温。如遇阴雨天，光照不足时，应采取增温保温措 Vegetable seedling root rhizomania is a physiological disease, mostly due to improper management. Root disease at the onset of hair rust, the root performance of severe decay, not a long new roots, yellowing wilt seedlings, late all died. Prevention and control measures should generally pay attention to four points: First, to maintain the appropriate temperature bed preparation to be reasonable, sowing seedlings to ensure adequate temperature. In case of overcast and rainy days, when the light is insufficient, we should take warming insulation measures