Red rice (Oryza rufipogon)

Red rice is an aquatic grass found in northern Australia. It has potential to reduce yields in commercial rice crops but it is not present in NSW or Victoria.

Profile

How does this weed affect you?

Red rice is native to northern Australia and parts of Asia. It is a weed in commercial rice crops. It can contaminate and reduce the value of rice crop. It is not yet present in rice growing regions of NSW and Vic. 

What does it look like?

Red rice is an erect, perennial or sometimes annual grass up to 4 m tall. 

The stalks are erect and spongy.

Leaves are up to 60 cm long and 2.5 cm wide. They are rough along the blade and the margins. 

The seed head is a loose branching cluster up to 20 cm long.

Where is it found?

Red rice does not currently occur in NSW. It is present in Western Australia, Northern Territory and Queensland.

It is a native Australian plant. 

Red rice grows in still or slow moving water up to 1 m deep.

References

Sharp, D. & Simon, B.K. (2002). AusGrass: Grasses of Australia. CD-ROM, Version 1.0 (Australian Biological Resources Study, Canberra, and Environmental Protection Agency, Queensland).

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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 31/03/2025
Glyphosate 360 g/L (Various products)
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 31/03/2025
Glyphosate 360 g/L (Various products)
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.

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

Reviewed 2021