Stemless thistle (Onopurdum acaulon)

Profile

Impact

Thistles are prolific seeders and can spread quickly if not controlled.

Description

Stemless thistle is a troublesome annual weed. It is prostrate (stemless) with a wreath-like appearance with flower heads in the centre of the rosette.

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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: 2.5 to 3.3 L per hectare
Comments: Boom spray application rosette stage to flowering
Withholding period: 7 days
Herbicide group: I, Disruptors of plant cell growth (synthetic auxins)
Resistance risk: Moderate


Dicamba 500 g/L (Kamba® 500)
Rate: 80 mL in 100 L of water
Comments: Spot spray. Seedlings to young mature plants; use lower rate on seedlings and higher rate on young, mature plants.
Withholding period: 7 days.
Herbicide group: I, Disruptors of plant cell growth (synthetic auxins)
Resistance risk: Moderate


Dicamba 500 g/L (Kamba® 500)
Rate: 1.2 L/ha
Comments: Boom 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 Shotâ„¢ )
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


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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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Reviewed 2014