The efficacy of simulated and aerial foliar herbicides on Chromolaena odorata

Abstract

Two ground-based pot trials were conducted in northern Queensland. Across both trials double passes and double concentrations of herbicides containing fluroxypyr, triclopyr and triclopyr + picloram + aminopyralid were more effective. Single passes and herbicides containing metsulfuron-methyl, aminopyralid and metsulfuron + aminopyralid were less effective. Observations of the field efficacy of an aerially applied double pass of a fluroxypyr herbicide were collected from infestations on two Northern Territory field sites in three different months, with greater efficacy observed from earlier and double pass treatments.