The invention discloses a
disease prevention planting method of dragon fruits, and relates to the technical field of planting. According to the method, sesames are planted in a large field in the previous year before fixed-planting of dragon fruits, after the sesames are harvested, the sesame
straw is crushed, and uniformly mixed with 8-12% of bacillus, 20-30% of
chitosan and 200-300% of
humus soil in terms of the weight of the sesame
straw, and then the mixture is evenly scattered into the large field, then the large field is covered with a layer of
straw, and finally, a layer of
urea is uniformly scattered on the straw, and the field is covered with a thin film; in the spring in the second year, the dragon fruits are planted by a column type cultivation method, purple perilla is plantedbetween the dragon fruit rows, and after the purple perilla is harvested, fennel is planted between the dragon fruit rows in the spring in the third year, after the fennel is harvested, the purple perilla is continuously planted, and the purple perilla and the fennel are circularly planted according to the method. According to the invention, the dragon fruits, the purple perilla and the fennel arereasonably interplanted and rotated, so that the occurrence of diseases and
insect pests of dragon fruits is reduced, the purpose of
pollution-free planting is achieved, and the yield is also improved.