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蔬菜品种多,茬口复杂,种植方式多样,病害防治乃是蔬菜生产十分突出的问题。据调查,京郊蔬菜病害500余种,其中30余种主要病害需要防治。多年来,一些病害一直没有找到理想的对路药剂,80年代以来,多种进口和国产杀菌剂推广应用,对控制和减轻蔬菜病害发挥了积极作用,但细菌性病害和少数真菌病害防治问题仍未得到很好解决。同时,由于蔬菜施药水平高,长期单一使用的现象严重,病菌很快产生抗性,许多杀菌剂对
Vegetable variety, complex crop stubble, planting a variety of ways, disease prevention but vegetable production is a very prominent issue. According to the survey, there are more than 500 kinds of vegetable diseases in the suburbs of Beijing, of which more than 30 kinds of major diseases need prevention and control. Over the years, some diseases have not found the ideal pathfinder. Since the 1980s, various kinds of imported and domestic fungicides have been promoted and applied, which has played an active role in controlling and reducing diseases of vegetables. However, the prevention and control of bacterial diseases and few fungal diseases Not well resolved. At the same time, due to the high level of vegetable pesticides, the phenomenon of single long-term use is serious, the bacteria quickly produce resistance, many fungicides