20世纪80年代以来,蔬菜根结线虫病在北京市近郊老菜区发生日趋严重,但直到2001年上半年,远郊区只有少数区、县零星发生。近几年,随着蔬菜生产发展,特别是保护地面积的扩大,此病在远郊蔬菜区扩展非常迅速。截至2003年仅过去2年左右时间,远郊7个主要蔬菜生产区县,除延庆外,顺义、 Since the 1980s, root-knot nematode disease has become more and more serious in the suburbs of Beijing. However, until the first half of 2001, only a few districts and counties in the outer suburbs had sporadic occurrences. In recent years, with the development of vegetable production, especially the protection of the expansion of the area, the disease in the suburbs of vegetable area expanded very rapidly. As of 2003 only two years or so time, the outer suburbs of seven major vegetable producing counties, except Yanqing, Shunyi,