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近年来,北方设施蔬菜种植已经有了相当大的规模,不过,蔬菜棚内生态环境较为特殊,一年四季都很相宜各种病虫害发生。要有效地防治病虫害,培育出优质安全的蔬菜,必须得科学、合理地使用农药。大棚菜病害的防治完全不同于大田或果园病害防治。一是大棚栽培品种繁多,栽培方式多样,耕作制度复杂,病害种类多,危害重;二是温度高、湿度大,易发生;三是田间操作频繁,病害易传播;四是用药频繁,病菌易产生抗性;五是多鲜食,用药限制多。因此要达到有效防
In recent years, there has been a considerable scale of vegetable planting in northern facilities. However, the ecological environment in vegetable sheds is rather special and all kinds of pests and diseases are very good throughout the year. To effectively prevent and control pests and diseases and cultivate high-quality and safe vegetables, we must scientifically and reasonably use pesticides. Greenhouse disease prevention and control is completely different from field orchard disease prevention and control. First, a wide range of greenhouse cultivation, cultivation methods and diverse, complex farming system, a variety of diseases, endangering heavy; Second, high temperature, humidity, prone to; Third, frequent field operations, disease spread easily; Fourth, frequent medication, Resistant; five is more fresh food, medication restrictions and more. So to achieve effective defense