Residues and Dissipation of the Herbicide Imazapyr after Operational Use in Irrigation Water
Tony M Dugdale, Kym L Butler, Mark J Finlay, Zhiqian Liu, David B Rees, Daniel Clements
International Journal of Environmental Research and Public Health | MDPI AG | Published : 2020
Imazapyr is a herbicide that can be used in irrigation canals to control a range of aquatic weed species, however, its residual nature, combined with its phytotoxicity to crops at low concentrations, means that the water in canals must be carefully managed following imazapyr application. Residues of the herbicide imazapyr (isopropylamine salt) in irrigation water were analysed and modelled after application to irrigation canals in south-eastern Australia. A treatment program to control delta arrowhead (sagittaria; Sagittaria platyphylla (Engelm.) J.G. Sm.) in over 400 km of irrigation canals was enacted by applying imazapyr to dewatered canals during winter. Following imazapyr application, c..View full abstract
This research was funded by Goulburn-Murray Water.