早疫病
| 中文 | English |
|---|---|
| 早疫病 | Early blight |
| 病原：Alternaria solani | Pathogen: Alternaria solani |
| 类型：真菌病害 | Type: Fungal disease |
主要症状 / Main Symptoms
| 中文 | English |
|---|---|
| 多发生在叶片、茎秆和果实上。 | Commonly occurs on leaves, stems, and fruits. |
| 叶片病斑呈褐色圆形或近圆形，具同心轮纹，边缘常有黄色晕圈。 | Leaf spots are brown, circular to oval, with concentric rings and yellow halos. |
| 严重时叶片提前枯黄脱落，植株早衰。 | Severe infection causes premature yellowing and leaf drop, leading to early senescence. |
| 果实上病斑近圆形，凹陷，深褐色至黑色。 | On fruits, lesions are circular, sunken, and dark brown to black. |
| 茎基部病斑呈长条状黑褐色，影响输导组织，导致植株枯死。 | Stem base lesions are elongated, dark brown, affecting vascular tissue and causing plant death. |
发生规律 / Occurrence
| 中文 | English |
|---|---|
| 病菌以菌丝体和分生孢子在病残体或土壤中越冬。 | Fungus overwinters as mycelium and conidia in plant debris or soil. |
| 高温高湿环境有利于病害流行。 | Warm and humid conditions favor outbreaks. |
| 连作地块、植株密度大、管理粗放时发病严重。 | Continuous cropping, dense planting, and poor management increase severity. |