DCMU (3-(3,4-dichlorophenyl)-1,1-dimethylurea) is a herbicide that inhibits photosynthesis. It was released by Bayer in 1954 under the name of Diuron.
Photosystem Photosynthesis PS II Reductant Plastoquinone Calvin cycle Lumen Electron transport chain Herbicide Bayer Redox Adenosine triphosphate