Group 6 herbicides

Bromoxynil is an organic compound with the formula HOBr2C6H2CN. It is classified as a nitrile herbicide, and as such sold under many trade names. It is a white solid. It works by inhibiting photosynthesis. It is moderately toxic to mammals.

Bentazon, or Bentazone, is a herbicide active ingredient. It is selective. Chemically, it is a thiadiazine. Sodium bentazon is available commercially as "Basagran", "Herbatox", "Leader" and "Laddock" and is coloued slightly brown.

Ioxynil is a post-emergent selective nitrile herbicide. It is used in Australia, New Zealand, Iran and Japan to control broadleaf weeds via the inhibition of photosynthesis. It is used notably on onion crops, among others, normally at 300–900 g/Ha. It was introduced in 1966. The supply of ioxynil is decreasing, as of 2019 but the herbicide remains effective.