The invention belongs to the technical field of prevention and control of
bulbus fritillariae cirrhosae gray mold by algin, and particularly relates to a
bulbus fritillariae cirrhosae gray mold ecological regulation and control
pesticide decrement prevention and control method, in the early stage of
bulbus fritillariae cirrhosae gray mold prevention and control, a
trehalose chain vaccine organic water-soluble
fertilizer diluent is uniformly sprayed to the whole field, and the
trehalose chain vaccine organic water-soluble
fertilizer contains more than or equal to 60g / L of organic matters and more than or equal to 60g / L of inorganic matters. The content of multi-element seaweed
oligosaccharide is greater than or equal to 6.5%; according to the growth period of bulbus fritillariae cirrhosae and the occurrence condition of gray mold,
biopesticide or chemical
pesticide is jointly applied in stages, specifically, a
bacillus subtilis preparation is applied in spring or autumn, and the content of effective components of the
bacillus subtilis preparation is 10 billion spores / g; when the morbidity of the field gray mold is larger than or equal to 10%, chemical
pesticide is applied, and the chemical pesticide is selected from one or two of 50%
procymidone WP and 50% boscalid WDG to be alternately used.