北方温室蔬菜冬季生产面临着许多问题,其中,影响温室蔬菜冬季生产效益的主要问题是温室内频繁发生的蔬菜病害。冬季栽培时期,低温高湿的内部环境条件、降低地力的连作、较低的地温、连阴天等都是助长病害多发的条件,这些病害包括气传病害、土传病害、病毒性病害、生理障碍。下面就这些病害 Winter vegetables production in the North Greenhouse faces many problems. Among them, the main problem that affects the winter production efficiency of greenhouse vegetables is the frequent vegetable diseases in the greenhouse. Winter cultivation period, low temperature and humidity of the internal environmental conditions, to reduce the continuous cropping, low ground temperature, even the cloudy are all conditions that contribute to the multiplication of diseases, these diseases include airborne diseases, soil-borne diseases, viral diseases, physiology obstacle. Below these diseases