冬春季节,蔬菜育苗由于受到气温、地温较低,且光照不足,畦内湿度较大等方面因素的影响,沤根和烂根现象往往同时发生,是蔬菜育苗期发生较重的生理性病害。发病症状表现为:幼苗出土后长期不发新根,根表呈锈褐色;逐渐锈烂,造 In winter and spring, due to temperature, low ground temperature, insufficient light and high humidity in vegetables, nursery vegetables often occur at the same time due to factors such as temperature and ground temperature, . Symptoms showed: long-term emergence of new roots after emergence of the seedlings, roots showed brown rust; gradually rust rotten, made