根结线虫 ( Meloidogynespp.)是危害农作物的重要病原之一 ,半个多世纪以来 ,对根结线虫病的防治均以化学为主。但由于多年来连续使用化学杀线剂 ,线虫抗药性增强 ,虫口密度回升快 ,因此 ,根结线虫的生物防治越来越受到重视。作者从 1 995年起 ,开展了根结线虫幼虫致病细菌的筛 Meloidogynespp. Is one of the important pathogens that endanger the crops. For more than half a century, the control of root-knot nematodes has been dominated by chemistry. However, due to continuous use of chemical nematicide over the years, nematode resistance increased, insect population density rose quickly, therefore, the biological control of root-knot nematode more and more attention. From 1995 onwards, the authors carried out a screening of root-knot nematode larvae pathogenic bacteria