An implement (1) for the cutting of stalks (2) in an onion plantation (3) which includes a chassis (4) on which there are mounted at least two rotating combing mechanisms (5, 6) of an essentially horizontal axis, a front combing mechanism (5) in which the lower part rotates in an opposite direction to the forward movement of the implement (1), and a rear combing mechanism (6) in which the lower part rotates in the same direction as the forward movement of the implement (1) also mounted on the chassis (4) is at least one essentially horizontal cutting bar (7), which is located behind the rear combing roller (6) to cut the stalks (2).