Ferti-Lome Decimate Weed and Grass Killer is a non-selective herbicide that effectively kills weeds, grass, and some woody plants. As a contact, semi-translocating herbicide, it works by inhibiting glutamine synthetase and shows results within 24 to 72 hours, performing best when temperatures are above 85 degrees. It becomes rainfast within half an hour to four hours, and areas may be reseeded or replanted once the spray has dried.