This invention discloses a method for controlling Canadian goldenrod, belonging to the field of biological control technology. The method includes: physical
tilling combined with chemical spraying during the
seedling stage;
tilling followed by application of biological herbicides during the vegetative growth stage; spraying flower
bud inhibitors to suppress seed formation during the flowering stage; and physical removal during the seed maturation stage. This invention employs a phased, multi-pronged, synergistic comprehensive control strategy, targeting the biological characteristics of Canadian goldenrod at different growth stages, and combining chemical, biological, and physical methods to achieve highly efficient, long-lasting, and
environmentally friendly control effects. This significantly reduces problems such as
herbicide resistance, high recurrence rates, and environmental
pollution caused by single-method control.