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Control of the emerging aquatic weed Amazon frogbit with flumioxazin

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Bickel, T. O., Farahani, B., Perrett, C., Xu, J. and Vitelli, J. S. (2022) Control of the emerging aquatic weed Amazon frogbit with flumioxazin. In: 22nd Australasian Weeds Conference, 25 – 29 September 2022, Adelaide, South Australia.



Amazon frogbit is an emerging aquatic weed that causes significant impacts to freshwater systems in Australia. Currently there are limited control options available, with only one herbicide (flumioxazin) registered for its control. Outdoor pond trials demonstrated that foliar and subsurface flumioxazin application provide excellent Amazon frogbit control (95-100% biomass reduction) at intermediate label rates. Subsurface application provided slightly better control than foliar spray. However, in deeper waterbodies foliar application will be more economical. In a field trial, a subsurface injection of flumioxazin (200 ppb) in a farm dam covered by a dense Amazon frogbit infestation provided ~99% control with a single application within three months. Overall, our work demonstrated that flumioxazin is an excellent control tool to manage Amazon frogbit and will greatly enhance the management of this invasive aquatic weed.

Item Type:Conference or Workshop Item (Paper)
Business groups:Biosecurity Queensland
Keywords:floating macrophytes, Limnobium laevigatum, aquatic herbicide, aquatic weed management.
Subjects:Science > Invasive Species > Modelling
Science > Invasive Species > Plants > Biological control
Science > Invasive Species > Plants > Effect of herbicides
Science > Invasive Species > Plants > Weed ecology
Plant pests and diseases > Weeds, parasitic plants etc
Plant pests and diseases > Pest control and treatment of diseases. Plant protection > Organic plant protection. Biological control
Agriculture > By region or country > Australia
Agriculture > By region or country > Australia > Queensland
Live Archive:18 Jan 2023 02:35
Last Modified:06 Feb 2024 05:17

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