Mode of action: Decree is characterized by protective and curative action with residual
activity against Botrytis cinerea in ornamentals. Decree seems to be a single-site inhibitor
with a very specific biochemical mode of action.
At very low concentrations, it inhibits hyphal growth and germ tube elongation of Botrytis
cinerea. The germ tube growth stage is considered to be the most sensitive stage in the life
cycle of Botrytis cinerea (happening outside the plant tissue, on the plant surface, before
penetration of the leaf cuticle).