To provide a technology for controlling weeds and the like. A method of controlling a weed in a sugarcane field, comprising applying one or more PPO-inhibiting compounds selected from Group A to a field before, at or after planting a stem cutting of sugarcane treated with one or more microorganisms selected from the group consisting of Gluconacetobacter species, Herbaspirilum species, Azospirilum species, and Burkholderia species:Group A:a group consisting of flumioxazin, sulfentrazone, saflufenacil, oxyfluorfen, fomesafen, oxadiazon and a compound represented by the formula (I):
