| Abstract: In order to solve the problem of quality and yield decline caused by continuous cultivation of leek, the diseases and pests caused by obstacles of continuous cultivation of leek were elaborated, including leek maggots, downy mildew, gray mold and phytophthora. The prevention and control measures of diseases and pests in continuous cultivation of leek were introducted from the perspectives of agricultural control, physical control, biological control and chemical control in details. Among them, agricultural control included cultivar selection, seed treatment, soil treatment, reasonable rotation and intercropping, and increasing the application of organic fertilizers. Physical prevention and control included hanging insect prevention nets and sticky insect boards, placing traps, insecticidal lamps, sugar and vinegar solutions and closing greenhouse in sun. |