However, commercial formulations of etridiazole at 100 mg/L and nitrapyrin at 100 mg/L were apparently fatal to ammonium-oxidizing bacteria. ###>Cependant, selon les formulations commerciales, l'étridiazole à 10 mg/L et la nitrapyrine à 100 mg/L seraient apparemment fatals pour les bactéries qui oxydent l'ammonium.