Metamitron

Metamitron is an organic compound used as a selective pre- and post-emergence herbicide in sugar beets. It is used in the European Union for weed suppression in sugar beets. Metamitron is marketed under the trade name Goltix by ADAMA in Europe, the United Kingdom, New Zealand, and South Africa.

Metamitron is a triazinone herbicide. It possesses a triazine ring like other organic compounds that use cyanuric chloride as a precursor. It is a modification of the chemical 1,2,4-triazin-5(4H)-one, with methyl, amino, and phenyl group substitutions at positions 3, 4, and 6.

Metamitron is in the HRAC Mode of action Group 5. It functions as an inhibitor of PSII by binding to serine 264 on the D1 protein. Resistance to metamitron has been found in Chenopodium album growing as weeds among sugar beet fields in Belgium, caused by a mutation in serine 264.

Metamitron has moderate acute oral and inhalation toxicity.