Prevention and treatment method for sooty mould of mangrove forest

The invention relates to the field of pest control, and particularly discloses a mangrove forest sooty mould control method. The mangrove forest sooty mould prevention and control method comprises the following steps that S1, first spraying liquid is adopted to spray vegetation in a mangrove forest for the first time, the first spraying liquid is a salt solution with the mass percentage concentration being 5%-1% o, the temperature of the first spraying liquid is 20-30 DEG C, and the first spraying time is half an hour or longer; s2, spraying a potassium-containing fertilizer on the surface of the vegetation; s3, second spraying liquid is adopted to conduct second spraying on the surface of the vegetation, the second spraying liquid is a salt solution with the mass percentage concentration being 1-10%, and the second spraying time is half an hour or longer. The method for preventing and treating the sooty mould of the mangrove forest is carried out aiming at the sooty mould of Aegiceras corniculatum in the man