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近年来,随着生产的发展,蔬菜的种类、面积有了显著的增加和扩大、栽培形式也发生了很大的变化。但相继而来的是病害类型复杂,病原物在温室、塑料大棚、田间等不同环境中得以长年循环存在,加剧了病害的繁衍与危害,致使蔬菜品质变劣,产量下降。因此,了解蔬菜病害的基本知识和主要病害的发生与防治,是科学种植蔬菜的一个重要方面。现就上
In recent years, with the development of production, the type and area of vegetables have significantly increased and expanded, and the forms of cultivation have also undergone great changes. However, the successive types of diseases are complicated. The pathogens can be circulated for many years in different environments such as greenhouses, plastic sheds and fields, exacerbating the multiplication and damage of diseases, resulting in the deterioration of vegetable quality and the decrease of yield. Therefore, to understand the basic knowledge of vegetable diseases and the occurrence and prevention of major diseases is an important aspect of the scientific cultivation of vegetables. Now on