Harmony - several years' experience with the control of weeds in maize.
In a total of 17 fields in maize, post-em. Harmony (thifensulfuron-methyl) at 7.5 g a.i./ha gave >80% control of Amaranthus retroflexus, Brassica nigra, Capsella bursa-pastoris, Galeopsis tetrahit, Galinsoga spp., Matricaria spp., Mentha arvensis and Polygonum spp., particularly P. convolvulus [Fallopia convolvulus] and P. persicaria. The addition of a surfactant or oil further improved the performance of Harmony, while its use in mixtures with bromoxynil at 175 and 735 g/ha or terbuthylazine at 490 and 735 g broadened its spectrum of activity. The best results were obtained when weeds were at the 2- to 4-leaf stage. It was concluded that, in order to avoid possible phytotoxicity to the maize, treatments should not be carried out beyond the 6-leaf stage of the crop.