一、番茄早疫病的症状:初期在番茄的茎叶上出现深褐色园形小斑点,逐渐扩大。病斑的边缘为深褐色,中央有同心轮纹,此病常从植株下部开始,逐渐向上漫延,严重时,植株下部叶片枯死,导致全株死亡。果实上的病斑多发生在果柄附近,病果常是早红而脱落。二、药剂防治:可用1:1:200倍的波尔多液或50%的甲基托布津可湿性粉剂700—1000倍液。乙基托布津350～500倍液或50%的多菌灵可湿性粉剂500—1000倍液80%可湿性代森锌500—800倍液,或 First, the symptoms of early blight tomato: the early emergence of small brown garden-shaped spots on the stems and leaves of tomatoes, and gradually expanded. The edge of the lesion is dark brown, with concentric ring pattern in the center. The disease often starts from the lower part of the plant and spreads upward gradually. In severe cases, the leaves of the lower part of the plant are dead and the whole plant dies. Lesions occur on the fruit near the stalk, the fruit is often red and fall off. Second, the chemical control: available 1: 1: 200 times Bordeaux mixture or 50% thiophanate-methyl WP 700-1000 times. Ethyl thiophanate 350 ~ 500 times or 50% of carbendazim WP 500-1000 times 80% wettableen zinc 500-800 times, or