Prevention and control method for canker of pitaya

The invention discloses a prevention and control method for canker of pitaya, and belongs to the technical field of pitaya cultivation. The prevention and control method for the canker of the pitaya comprises the steps of S1, checking whether a pitaya tree has canker or not, and if the pitaya tree has canker, removing disease spots; S2, cleaning an orchard, cutting off diseased branches, then, spraying the whole pitaya orchard with an equal amount of Bordeaux mixture, wherein spraying is continuously conducted four times, and the spraying interval time is 20 days; S3, carrying out pesticide protection, wherein in the high-temperature and high-humidity season, pitaya and new branches on the pitaya tree are sprayed with pesticide for protection, the pesticide spraying frequency includes thatthe pesticide spraying interval is 7 days in a young fruit period, the pesticide spraying interval in other periods is 20-30 days, the sprayed pesticide comprises Baitai bactericide liquid, mixed liquid of prochloraz and man