Diallate is a herbicide that is one of the lesser known members of the thiocarbamate family. These chemicals are selective herbicides marketed for weed control in croplands. The thio and dithiocarbamates are extremely volatile and must be incorporated into the soil at the time of planting. The mechanism of action is inhibition of the development of seedling shoots and roots as they emerge from the weed seeds. Diallate inhibits the growth of annual and perennial grassy seeds and broadleaf weeds.