Saffron thistle (Carthamus lanatus)

Profile

Impact

Saffron thistle is native to the Mediterranean region and is a serious weed of crops and pastures in NSW. It is an erect, rigid, annual plant usually growing up to one metre in height. It mainly occurs on overcropped paddocks with low fertility and poorly structured soils.

Saffron thistle mainly occurs in the Northwest Slopes and the Central West regions of NSW. It spreads by seed only and is often spread as a contaminate of grain, hay or wool and by the movement of stock or farm vehicles.

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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 300 g/L + Picloram 75 g/L (Tordon® 75-D)
Rate: 300 mL/ha
Comments: Boom spray application for young rosette or seedling plants.
Withholding period: 1-8 weeks (see label).
Herbicide group: I, Disruptors of plant cell growth (synthetic auxins)
Resistance risk: Moderate


2,4-D amine 625 g/L (Amicide® 625)
Rate: 110–170 mL per 150 L of water
Comments: Spot spray application.
Withholding period: 7 days.
Herbicide group: I, Disruptors of plant cell growth (synthetic auxins)
Resistance risk: Moderate


2,4-D amine 625 g/L (Amicide® 625)
Rate: 1.1–1.7 L/ha
Comments: Boom application, apply when in rosette stage.
Withholding period: 7 days.
Herbicide group: I, Disruptors of plant cell growth (synthetic auxins)
Resistance risk: Moderate


2,4-D LV ester 680g/L (Estercide® Xtra)
Rate: 800 ml to 2.5 L per hectare
Comments: Boom spray application up to rosette stage
Withholding period: 7 days
Herbicide group: I, Disruptors of plant cell growth (synthetic auxins)
Resistance risk: Moderate


Clopyralid 300 g/L (Lontrel®)
Rate: 250 mL per 100 L water
Comments: Spot spray.
Withholding period: 1-12 weeks (see label).
Herbicide group: I, Disruptors of plant cell growth (synthetic auxins)
Resistance risk: Moderate


Clopyralid 300 g/L with MCPA 500 g/L (Various products)
Rate: 50-70 mL clopyralid plus 1.0–1.5 L MCPA per ha
Comments: Boom spray. Actively growing rosettes; use higher rate on mature plants.
Withholding period: 1-12 weeks (see label).
Herbicide group: I, Disruptors of plant cell growth (synthetic auxins)
Resistance risk: Moderate


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


MCPA 500 g/L (Various products)
Rate: 100–200 mL in 150 L water
Comments: Spot spray.
Withholding period: 7 days.
Herbicide group: I, Disruptors of plant cell growth (synthetic auxins)
Resistance risk: Moderate


MCPA 500 g/L (Various products)
Rate: 1–2 L/ha
Comments: Boom spray. Apply when in rosette stage. Use higher rate for larger weeds.
Withholding period: 7 days.
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 2015