Mintweed (Salvia reflexa)

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How does this weed affect you?

Mintweed is native of North & South America. It is a branched erect aromatic annual herb to 70 cm high with a blue-green appearance. It emits a strong mint aroma when crushed.

Mintweed grows rapidly and sets seed within 2 months of germination. Mintweed is thought to have been introduced to Australia in hay in the early 1900's and has since spread to become a weed of cultivation, pastures, roadsides and waste places. Plants are mainly weeds of summer crops and pastures. Mintweed is toxic but seldom eaten by stock. Travelling stock, young stock and hungry stock are most at risk.

How does it spread?

Mintweed is spread by seed, which can be transported by water runoff, mud which adheres to animals, humans or machinery or as a contaminant of agricultural produce or seed.

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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 amine 625 g/L (Amicide® 625)
Rate: 1.1 L/ha
Comments: Boom spray application
Withholding period: 7 days.
Herbicide group: I, Disruptors of plant cell growth (synthetic auxins)
Resistance risk: Moderate


Glyphosate 360 g/L (Roundup®)
Rate: 500–700 mL per 100 L of water
Comments: High volume spot spray.
Withholding period: Nil.
Herbicide group: M, Inhibitors of EPSP synthase
Resistance risk: Moderate


Glyphosate 360 g/L (Roundup®)
Rate: 2.0–3.0 L/ha
Comments: Boom spray. Apply to actively growing plants.
Withholding period: Nil.
Herbicide group: M, Inhibitors of EPSP synthase
Resistance risk: Moderate


MCPA 500 g/L (Various products)
Rate: 2.0 L/ha
Comments: Boom spray application for actively growing seedlings.
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