African turnip weed - eastern (Sisymbrium thellungii)

African turnip is a herb up to 60 cm high with rough thin leaves and yellow flowers. It is a weed in crops, pastures and natural environments.

Profile

How does this weed affect you?

African turnip weed invades pasture and crops such as wheat. It can also invade natural forests and wetlands.

What does it look like?

This weed is an annual herb that grows up to 60 cm high. It is erect with roughly hairy thin leaves up to 30 cm long.  Flowers are yellow to pale yellow with small petals up to 8 mm long.

Where is it found?

African turnip weed has limited distribution within NSW but has the potential for further spread to areas with heavy soils.

More information

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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.


Oxyfluorfen 240 g/L (Goal Herbicide)
Rate: 3 to 4 L per hectare
Comments: Boom spray for forestry - pre-emergence application.
Withholding period: Do not allow livestock to graze treated weeds.
Herbicide group: 14 (previously group G), Inhibition of protoporphyrinogen oxidase (PPO inhibitors)
Resistance risk: Moderate


Simazine 900 g/kg (Various products)
Rate: 5 kg per ha or 500 g in 100 L of water
Comments: Boom spray for non-crop areas. Apply to bare moist ground for seasonal control of germinating weeds.
Withholding period: Not required when used as directed.
Herbicide group: 5 (previously group C), Inhibition of photosynthesis at photosystem II - D1 Serine 264 binders (and other nonhistidine binders) (PS II Serine 264 inhibitors)
Resistance risk: Moderate


Simazine 900 g/kg (Various products)
Rate: 10 or 24 kg per ha or 1 kg or 2.4 kg per 100 L of water
Comments: Non-crop areas: For long term residual control of weeds in light soils. Apply to moist bare ground. Use lower rate for winter rainfall areas and higher rate for summer rainfall areas.
Withholding period: Not required when used as directed.
Herbicide group: 5 (previously group C), Inhibition of photosynthesis at photosystem II - D1 Serine 264 binders (and other nonhistidine binders) (PS II Serine 264 inhibitors)
Resistance risk: Moderate


Simazine 900 g/kg (Various products)
Rate: 1.6 to 6.7 kg per ha
Comments: Boom spray for forestry - pre-emergence application.
Withholding period: Not required when used as directed.
Herbicide group: 5 (previously group C), Inhibition of photosynthesis at photosystem II - D1 Serine 264 binders (and other nonhistidine binders) (PS II Serine 264 inhibitors)
Resistance risk: Moderate


Simazine 900 g/kg (Various products)
Rate: 24 kg or 48 kg per ha; or 2.4 kg or 4.8 kg per 100 L of water.
Comments: Spot spray or boomspray for non-crop areas: For long term residual control of weeds in heavy soils. Apply to moist bare ground. Use lower rate for winter rainfall areas and higher rate for summer rainfall areas.
Withholding period: Not required when used as directed.
Herbicide group: 5 (previously group C), Inhibition of photosynthesis at photosystem II - D1 Serine 264 binders (and other nonhistidine binders) (PS II Serine 264 inhibitors)
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 pest 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.

Reviewed 2024