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一、番茄晚疫病1.症状识别番茄晚疫病又名番茄疫病,是番茄上发生最普遍、危害最重的病害。该病害由真菌引起,主要危害叶片、果实、茎和叶柄。苗期至成株期均可染病。苗期染病,病斑由主茎开始蔓延,嫩茎部缢缩腐烂,病部以上枝叶死亡,湿度大时病部表面产生白色霉层。2.发病规律该病适于高温高湿环境,最适发病温度18~25℃,相对湿度95%以上。最适感病生育期为成株期至坐果期,发病潜育期3~5天。多连阴雨天气的年份
First, the tomato late blight 1. Symptoms identification tomato late blight, also known as tomato blight, is the most common on tomato, the most damaging diseases. The disease is caused by fungi and mainly harms leaves, fruits, stems and petioles. Seedling to adult stage can be infected. Seedling disease, lesion began to spread by the main stem, tender stem shrinkage decay, disease above the branches and leaves of death, humidity when the surface of white mold layer. 2. The incidence of the disease suitable for high temperature and humidity environment, the optimum onset temperature of 18 ~ 25 ℃, relative humidity above 95%. The most suitable susceptible stage of growth for the adult to fruit set, the incidence of incubation period of 3 to 5 days. Years with more rainy weather