由于大棚蔬菜具有高温、高湿、封闭和连茬种植的特点，为蔬菜病虫的周年繁殖提供了适宜的气候条件及越冬场所，危害日趋猖獗，使菜农在经济上遭受很大损失。那么怎样才能正确掌握识别大棚蔬菜病害的方法呢？一般情况下，大棚菜病害可分为四大类：即真菌类、细菌类、病毒类、生 Because of the characteristics of greenhouse vegetables with high temperature, high humidity, closed and continuous cropping, it provides the suitable climatic conditions and wintering places for the annual breeding of pests and diseases of vegetables, the harm is becoming more and more rampant, and the vegetable farmers suffer great economic losses. So how can we correctly identify the method of identifying vegetable disease in greenhouses? Under normal circumstances, greenhouse vegetable diseases can be divided into four categories: fungi, bacteria, viruses, students