spray white vinegar on leeks after harvesting. Principle: Edible white vinegar is a common kitchen product in our life. In the process of agricultural planting, white vinegar is not only a foliar fertilizer with obvious effect, but also an efficient sterilization agent for inhibiting pests and diseases. Sprinkling plant ash, leek is a kind of herbaceous multi-crop plant that can be harvested repeatedly, and can obtain mature fruits several times; However, the multi-crop growth habit of leek also needs a certain amount of nutrients as the basis of energy output.