Trunk-injection medicament for controlling branch and trunk diseases of fruit trees, and preparation method for trunk-injection medicament

The invention discloses a trunk-injection medicament for controlling branch and trunk diseases of fruit trees. The trunk-injection medicament is prepared from the following components by volume percentage: 0.5-10% of a bactericidal substance, 0.025-0.1% of a surfactant, 0.1-2% of a nutrient substance, 0.01-0.1% of a penetrating agent and 89-99% of water, wherein the total content of the components is 100%. The invention further discloses a preparation method for the trunk-injection medicament, and the preparation method comprises the following steps: weighing the raw materials, adding all of the weighed components into water separately, and stirring to enable the mixture to be mixed uniformly to prepare a stock solution of medical liquid; filling and sealing to obtain the trunk-injection medicament. The trunk-injection medicament allows nutrient required for the growth of plants to be organically combined, so that not only are pathogenic fungi killed, but also the plant wound healing is accelerated to speed up recovery of the trees; meanwhile, the trunk-injection medicament has the characteristics of being safe, nontoxic and wide in raw material source, and is suitable for large-sized popularization and application, easy to use, excellent in effect, and suitable for large-scale popularization and application.