St. Barnaby's thistle (Centaurea solstitialis)

Profile

Impact

It will outcompete crops and pastures and dense patches can restrict stock movement.

Distribution

It is well established through many parts of NSW. 

Description

St Barnaby’s thistle is an annual or short-lived plant, to 75 cm high. Flower heads are bright yellow surrounded by rows of yellow spines. 

References

Parsons W.T. and Cuthbertson E.G. (1992) Noxious weeds of Australia. (Inkata Press, Melbourne).

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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.


2,4-D LV ester 680g/L (Estercide® Xtra)
Rate: 1.15 - 1.7 L per Hectare
Comments: Boom spray application
Withholding period: 7 days
Herbicide group: I, Disruptors of plant cell growth (synthetic auxins)
Resistance risk: Moderate


Fluroxypyr 140 g/L + Aminopyralid 10 g/L (Hot Shot™ )
Rate: 500 ml in 100 L of water
Comments: Hand gun application
Withholding period: 7 days. See label for export restrictions.
Herbicide group: I, Disruptors of plant cell growth (synthetic auxins)
Resistance risk: Moderate


Glufosinate-ammonium 200 g/L (Basta® )
Rate: 1.5–5.0 L/ha
Comments: Boom spray. Actively growing rosettes.
Withholding period: 8 weeks.
Herbicide group: N, Inhibitors of glutamine synthetase
Resistance risk: Moderate


Glufosinate-ammonium 200 g/L (Basta® )
Rate: 500 ml in 100 L of water
Comments: Hand gun application
Withholding period: 8 weeks.
Herbicide group: N, Inhibitors of glutamine synthetase
Resistance risk: Moderate


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Legal requirements

The content provided here is for information purposes only and is taken from the Noxious Weeds (Weed Control) Order 2014 published in the NSW Government Gazette, detailing weeds declared noxious in New South Wales, Australia, under the Noxious Weeds Act 1993. The Order lists the weed names, the control class and the control requirements for each species declared in a Local Control Authority area.

Area Class Legal requirements
Albury 4 Locally Controlled Weed
The growth of the plant must be managed in a manner that continuously inhibits the ability of the plant to spread
Federation 4 Locally Controlled Weed
The growth of the plant must be managed in a manner that continuously inhibits the ability of the plant to spread only in the area formerly known as Urana Shire Council
Lockhart 4 Locally Controlled Weed
The growth of the plant must be managed in a manner that continuously inhibits the ability of the plant to spread
Snowy Valleys 4 Locally Controlled Weed
The growth of the plant must be managed in a manner that continuously inhibits the ability of the plant to spread only in the area formerly known as Tumut Shire Council
Wagga Wagga 4 Locally Controlled Weed
The growth of the plant must be managed in a manner that continuously inhibits the ability of the plant to spread
Weddin 4 Locally Controlled Weed
The growth of the plant must be managed in a manner that continuously inhibits the ability of the plant to spread

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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 2014