白粉病 Powdery Mildew
| 中文 | English |
|---|---|
| 基本信息 | Basic Information |
| 中文名：白粉病 英文名：Powdery Mildew 病原：Leveillula taurica 类型：真菌病害 | Chinese name: 白粉病 English name: Powdery Mildew Pathogen: Leveillula taurica Type: Fungal disease |
| 主要症状 | Main Symptoms |
| 主要危害叶片。叶片正面出现黄斑，背面形成白色粉状霉层。严重时叶片提前枯黄脱落，影响植株光合作用和产量。 | Mainly affects leaves. Yellow spots form on the upper leaf surface, with white powdery growth on the underside. Severe cases cause premature leaf yellowing and drop, reducing photosynthesis and yield. |
| 发生规律 | Epidemiology |
| 病菌以分生孢子传播，干燥温暖条件（20–30℃）下易发生。通风不良的温室或高密度栽培环境下发病严重。 | Spread via conidia. Warm, dry conditions (20–30°C) favor infection. Severe in greenhouses or dense plantings with poor ventilation. |