甜菜的根瘤病是由杆状细菌引起的一种病害,目前所知它能感染双子叶植物138个科,588个属中的1193种植物。有93个科331个属的643个种是它的寄主植物,其中包括甜菜、葡萄、李、桃、玫瑰、马铃薯、西红柿等重要经济作物。因此它是一种寄主十分广泛的危害比较严重的细菌,这种细菌叫致瘤农杆菌。该菌革兰氏阴性反应,大小0.7—0.8×2—3μm,杆状,具有4—5根鞭毛,能运动的一种细菌。分类学上属于根瘤菌科土壤杆菌属(Agro- The root nodule disease of beet is a disease caused by bacilli that has been known to infect 138 families of dicotyledons and 1,193 of 588 genera. There are 643 species of 331 genera and 93 families, which are the host plants, including important economic crops such as sugar beet, grape, plum, peach, rose, potato and tomato. So it is a host of a wide range of more damaging bacteria, the bacteria called Agrobacterium. The gram-negative bacteria, the size of 0.7-0.8 × 2-3μm, rod-shaped, with 4-5 flagella, a bacteria that can move. Taxonomically belongs to the genus Rhizobium Agrobacterium (Agro-