Triazines alone are not sufficiently active to control cudweed satisfactorily with or without an earlier application or glyphosate.The addition of metolachlor to terbuthylazine improved the control of seedlings to give satisfactory results following an application of glyphosate.A mixture of terbuthylazine and diuron gave excellent control of over-wintering and germinating cudweed without the need for glyphosate.