Water soldier (Stratiotes aloides)

PROHIBITED MATTER: If you see this plant report it to the NSW Invasive Plants & Animals Enquiry Line 1800 680 244

Water soldier is an emergent aquatic plant that has the potential to become a serious weed of freshwater lakes, ponds and dams in Australia.

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How does this weed affect you?

Water soldier is an emergent aquatic plant that has the potential to become a serious weed of freshwater lakes, ponds and dams in Australia. It is a plant with vigorous growth that forms dense stands in suitable conditions. These dense stands can exclude native wetland plants and destroy aquatic habitats.

Water soldier leaves resemble aloe plants, and as such it is also called water aloe.

Water soldier has an unusual growth habit. It is a submerged plant except in summer when it rises to the water surface to flower. The new leaves that grow in spring contain air pockets allowing the plant to float. As the older leaves die back in autumn they become waterlogged which causes the plant to sink again.

Water soldier can remain submerged all year round and can grow in depths of up to 5 m.

What does it look like?

Water soldier is an emergent aquatic plant that has the potential to become a serious weed of freshwater lakes, ponds and dams in Australia. It is a plant with vigorous growth that forms dense stands in suitable conditions. These dense stands can exclude native wetland plants and destroy aquatic habitats.

Water soldier leaves resemble aloe plants, and as such it is also called water aloe.

Water soldier has an unusual growth habit. It is a submerged plant except in summer when it rises to the water surface to flower. The new leaves that grow in spring contain air pockets allowing the plant to float. As the older leaves die back in autumn they become waterlogged which causes the plant to sink again.

Water soldier can remain submerged all year round and can grow in depths of up to 5 m.

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Control

Herbicide options

WARNING - ALWAYS READ THE LABEL
Users of agricultural or veterinary chemical products must always read the label and any permit, before using the product, and strictly comply with the directions on the label and the conditions of any permit. Users are not absolved from compliance with the directions on the label or the conditions of the permit by reason of any statement made or not made in this information. To view permits or product labels go to the Australian Pesticides and Veterinary Medicines Authority website www.apvma.gov.au

See Using herbicides for more information.


PERMIT 9907 Expires 31/03/2020
Glyphosate 360 g/L (Roundup®)
Rate: One part product to 50 parts water
Comments: Spot spray
Withholding period: Nil.
Herbicide group: M, Inhibitors of EPSP synthase
Resistance risk: Moderate


PERMIT 9907 Expires 31/03/2020
Glyphosate 360 g/L (Roundup®)
Rate: One part product to 9 parts water
Comments: Splatter gun
Withholding period: Nil.
Herbicide group: M, Inhibitors of EPSP synthase
Resistance risk: Moderate


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Biosecurity duty

The content provided here is for information purposes only and is taken from the Biosecurity Act 2015 and its subordinate legislation, and the Regional Strategic Weed Management Plans (published by each Local Land Services region in NSW). It describes the state and regional priorities for weeds in New South Wales, Australia.

Area Duty
All of NSW General Biosecurity Duty
All plants are regulated with a general biosecurity duty to prevent, eliminate or minimise any biosecurity risk they may pose. Any person who deals with any plant, who knows (or ought to know) of any biosecurity risk, has a duty to ensure the risk is prevented, eliminated or minimised, so far as is reasonably practicable.
All of NSW Prohibited Matter
A person who deals with prohibited matter or a carrier of prohibited matter is guilty of an offence. A person who becomes aware of or suspects the presence of prohibited matter must immediately notify the Department of Primary Industries

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For technical advice and assistance with identification please contact your local council weeds officer.
For further information call the NSW Invasive Plants and Animals Enquiry Line on 1800 680 244 or send an email to weeds@dpi.nsw.gov.au

Reviewed 2018