疫病 Phytophthora Blight
| 中文 | English |
|---|---|
| 基本信息 | Basic Information |
| 中文名：疫病 英文名：Phytophthora Blight 病原：Phytophthora capsici 类型：卵菌病害 | Chinese name: 疫病 English name: Phytophthora Blight Pathogen: Phytophthora capsici Type: Oomycete disease |
| 主要症状 | Main Symptoms |
| 可危害辣椒的根、茎、叶和果实。幼苗染病后易猝倒。茎基部出现暗褐色水渍状病斑，常环绕茎部，导致植株萎蔫、死亡。叶片染病时出现水渍状斑，逐渐扩大。果实染病则出现褐色或黑色腐烂，表面常有白色霉层。 | Affects roots, stems, leaves, and fruits of peppers. Seedlings may collapse when infected. Water-soaked brown lesions appear on stem bases, often girdling stems, leading to wilting and plant death. Leaves show water-soaked lesions that enlarge, while fruits develop brown to black rot, often covered with white mold. |
| 发生规律 | Epidemiology |
| 病菌以卵孢子在土壤和病残体中存活。高温高湿条件下（24–30℃，土壤积水）易暴发。雨水、灌溉水可传播病菌，田间排水不良时发病严重。 | The pathogen survives as oospores in soil and plant debris. Warm and humid conditions (24–30°C, waterlogged soil) favor outbreaks. Spread occurs via rainwater and irrigation. Poor drainage in fields increases disease severity. |