Medicament for disinfecting plum tree, live wood disinfecting method and application of medicament for disinfecting plum tree

The invention discloses a medicament for disinfecting a plum tree, a live wood disinfecting method and application of the medicament for disinfecting the plum tree. The medicament for disinfecting the plum tree contains the following active ingredients in weight proportion: 0.0005-0.002wt% of ribavirin, 0.00005-0.0001wt% of abscisic acid and 0.1-1wt% of chitosan. The invention also relates to a live wood disinfecting method of the medicament for disinfecting the plum tree and application of the medicament for disinfecting the plum tree in prevention and control of one or more than one plant viruses of prune dwarf virus (PDV) and prunus necrotic ringspot virus (PNRSV). Compared with the prior art, the medicament for disinfecting the plum tree has a good prevention and control effect, dosage can be reduced, and pollution to the environment can be reduced; besides, a scientific method is utilized for carrying out live wood disinfection on the plum tree, especially local specialty prunus salicina in Guizhou province, viruses on part of branches bearing fruits and blades are killed or inhibited, and harm of the viruses is reduced, so that yield is increased, and fruit flavour is improved.