A study of 15 spray operators showed a 300% to 400% difference in volumes applied to treat the same bush. In this controlled study, all the applicators followed the same label directions and operated the same equipment. The large discrepancies in spray volumes were responsible for poor control due to under-spraying or increased costs from over-spraying.
Five considerations when selecting a herbicide:
Situations for specific herbicides:
Metsulfuron-methyl: Recommended for initial treatment of large, dense infestations.
Glyphosate: Recommended for small infestations that are easy to check and retreat and areas where other herbicides cannot be used, such as in or near watercourses and in urban and peri-urban areas.
Triclopyr: Recommended for initial treatment of large infestations.
Picloram: Recommended where the use of pellet formulations is considered the most appropriate application technique.
Picloram + Triclopyr: Recommended for most infestations, both large and small, as it usually provides the highest levels of control.