立枯病 Damping-off
| 中文 | English |
|---|---|
| 基本信息 | Basic Information |
| 中文名：立枯病 英文名：Damping-off 病原：Pythium spp., Rhizoctonia solani 等 类型：真菌病害 | Chinese name: 立枯病 English name: Damping-off Pathogen: Pythium spp., Rhizoctonia solani, etc. Type: Fungal disease |
| 主要症状 | Main Symptoms |
| 多见于苗期。幼苗出土前可造成种子腐烂，不能出苗；出土后茎基部出现褐色水渍状病斑，逐渐收缩，导致幼苗倒伏、成片死亡。 | Common in seedling stage. Before emergence, seeds rot and fail to germinate; after emergence, brown water-soaked lesions form at stem base, constricting tissue and causing seedlings to collapse and die in patches. |
| 发生规律 | Epidemiology |
| 病菌在土壤、病残体中存活。高湿、低温、土壤透气性差时易发病。过密播种或浇水过多会加重病害。 | Pathogens survive in soil and debris. Disease favored by high humidity, low temperature, and poor soil aeration. Dense sowing and excessive watering aggravate infection. |