番茄等蔬菜受种植、管理措施、防治用药、气候条件、肥料施用等多种因素影响,经常会发生各类病虫害。生产实践中,菜农可以采用逐步排除法进行病症诊断。一、病害由病原寄生物侵染引起的植物不正常生长和发育受到干扰破坏所表现的病态,常有发病中心,由点到面。1、真菌病害。蔬菜遭到 Tomato and other vegetables by planting, management measures, prevention and treatment of drugs, climate conditions, fertilizer application and other factors, often occur in all kinds of pests and diseases. Production practice, vegetable farmers can use progressive elimination of the disease diagnosis. First, the disease caused by the pathogen parasitic infection caused by abnormal plant growth and development by the disturbance of the pathological performance, often the center of disease, from point to surface. 1, fungal diseases. Vegetables have been