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近年来,随着蔬菜生产的发展,保护地面积进一步扩大。由于保护地复种指数高,倒茬困难,且环境密闭,湿度较大,有利于病害的发生和流行。病害发生后广大菜农习惯于喷雾防治,这样容易增加棚室内湿度,若管理不善极易造成病害的大流行,而采用粉尘防治可避免此矛盾。粉尘防治法的优点,一是防治效果好;二是工效高;三是节省成本,是一种值得推广的防治技术。
In recent years, with the development of vegetable production, the protected area has been further expanded. Due to the high multiplying index of the protected area, the stubble is difficult and the environment is confined and the humidity is relatively large, which is good for the occurrence and prevalence of the diseases. After the occurrence of the disease, the majority of farmers accustomed to spray prevention and control, it is easy to increase the indoor humidity, if the poor management can easily cause disease pandemic, and the use of dust control can avoid this conflict. The advantages of dust control law, first, good control effect; Second, high efficiency; Third, cost savings, is a worthy of promotion of prevention and control technology.