进入冬季,随着气温不断下降,保护地蔬菜管理的重点转移到保温上来。因此,为了做到保温势必会减少放风的时间,引起棚内湿度增加,蔬菜叶面结露的时间增多,结露现象严重,这样会造成病虫害的发生几率上升,特别是在连续阴雨天气条件下,造成大棚内低温高湿、光照弱极易暴发多种病害,如菌核病、灰霉霜霉病等等。故此,冬季棚室在防治病害时要尽量设法降低湿度,即在喷药时减 Into the winter, as temperatures continue to decline, the focus of protected vegetable management shifted to heat up. Therefore, in order to achieve the insulation will inevitably reduce the time of the wind, causing the shed humidity increases, the time of the vegetable foliage dew condensation, dew condensation is serious, this will cause the probability of pests and diseases increased, especially in continuous rainy weather conditions , Resulting in low temperature and humidity in the greenhouse, the light is very vulnerable to the outbreak of a variety of diseases, such as sclerotisis, gray mold downy mildew and so on. Therefore, the winter studio in the prevention and treatment of diseases should try to reduce the humidity, that is, when the spraying less