茄子早疫病是我市保护地近年来发展起来的一种新病害,其来势猛、蔓延迅速,特别是苗期受害尤为严重,给茄子生产造成了严重的影响。为确保保护地茄子的丰产丰收,必须正确识别茄子早疫病的症状及病原物,及时准确地进行防治。 一、茄子早疾病症状与病原物的识别 1.症状 茄子早疫病主要为害叶片。被害初期病斑褐色至黑色呈圆形或近圆形小斑点,后逐渐扩大,直径为2～10mm,边缘深褐色,中央灰褐色,具同心轮纹。湿度大时病斑上长出微细的灰黑色霉状物。后期病斑中央脆裂。病斑自下而上逐渐蔓 Early blight of eggplant is a new disease that developed in our city in recent years. The epidemic is rapid and spread rapidly, especially in seedling stage, which seriously affects eggplant production. In order to ensure the bumper harvest of eggplant in protected area, the symptoms and pathogens of early blight of eggplant must be correctly identified and controlled timely and accurately. First, the early symptoms of eggplant and pathogen identification 1. Symptoms of early blight eggplant damage leaves. The initial lesion was brown to black round or nearly circular small spots, and then gradually expanded, a diameter of 2 ~ 10mm, dark brown edge, the central gray-brown, with concentric wheel pattern. When the humidity is high, the lesion grows fine gray-black moldy substance. Late central lesion brittle. Lesions gradually spread from the bottom up