Fresh keeping agent for inhibiting pathogenic bacteria diseases of pitaya as well as preparation method and application of fresh keeping agent

The invention discloses a preservative for inhibiting pathogenic bacteria diseases of pitaya as well as a preparation method and application of the preservative, and belongs to the technical field of pitaya preservation. Plant essential oil and/or chlorine dioxide are/is used for inhibiting pathogenic bacteria diseases of the pitaya; wherein the plant essential oil is any one or a combination of clove essential oil, pitaya flower essential oil and sweet osmanthus essential oil. The invention relates to the technical field of fresh-keeping agents, and discloses a fresh-keeping agent, which has a good inhibition effect on pitaya peel diseases caused by pathogenic bacteria of Gilbertella persicaria and Fusarium incarnatum, and can be applied to a precise fresh-keeping treatment technology in specific storage and transportation environments and different circulation modes, and the pitaya peel diseases are caused by the pathogenic bacteria of Gilbertella persicae and Fusarium oxysporum. 本发明公开一种抑制火龙果病原菌病害的保鲜剂及其制备方法