593916 Disclosed is a method for modulating germination and growth of monocotyledonous, dicotyledonous and sedge weeds in a non-rice cereal crop growth system and/or a turf grass growth system and/or Timothy grass growth system and/or pasture grass growth system, comprising applying to said weeds or soil in said growth system at least one herbicidal agent, wherein said herbicidal agent is thaxtomin. Additionally disclosed is a herbicidal composition comprising thaxtomin and a second herbicide selected from a bioherbicide or chemical herbicide, and the use thereof.