Provided is a method whereby an excellent controlling effect can be exerted for controlling herbicide resistant weeds in an agricultural crop growing area, said method comprising a step for applying one or more kinds of herbicides selected from the group consisting of saflufenacil, trifludimoxazin, flumioxazin and ethyl [3-[2-chloro-4-fluoro-5-(l-methyl-6-trifluoromethyl-2,4-dioxo-l,2,3,4-tetrahydropyrimidin-3-yl)phenoxy]-2-pyridyloxy]acetate.
