根据以往人工皮接接种试验结果,均认为枣疯类菌原体于接种后7—10天愈合就开始由韧皮部向下运行,逐渐达到根部,经增殖后,才从根部向上运行到树冠,引起疯枝,七月间接种的小树当年可疯,两米以上的树一般到第二年才疯。但在自然发病情况下,在一棵大树上,有时发现只疯一小枝,如从此小疯枝所在大枝的从部砍断则该树不再发病,这说明类菌原体未向下运行到根亦可发病。这种自然现象,用上述论据又 According to the results of past artificial skin inoculation test, it is considered that the jujube legume mycoplasma healed 7 to 10 days after inoculation began to run down from the phloem, and gradually reached the root, after proliferation, ran from the root up to the crown, causing Crazy sticks, trees inoculated in July then crazy, more than two meters of trees generally until the next year crazy. However, in the case of natural disease, on a large tree, sometimes only found a crazy branch, such as from the branch where the small branches where the branches are no longer the incidence of disease, indicating that the class of bacteria is not running down The root can also be disease. This natural phenomenon, with the above arguments in turn