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Home > Invasive Species > Weeds > Paterson's Curse - Herbicides for Control

Herbicides for Paterson's Curse and Viper's Bugloss Control

These herbicide recommendations are made subject to the product being registered for that purpose under relevant legislation. It is the user's responsibility to check that registration or an off-label permit covers the proposed use. Always read the herbicide label.

If in doubt, check with the Australian Pesticides and Veterinary Medicines Authority (APVMA) website at www.apvma.gov.au

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Only herbicides registered for use in pasture and non-cropping situations – or included under off-label provisions - are listed in the following table. For recommendations in specific crops consult an agronomist.

Care must be taken in using herbicides as non-target plants contacted may be harmed.

Wetting agents

Most herbicides require a wetting agent for best results. Carefully consult the product label for specific directions regarding any adjuvants.

Waterways and wetlands

Be careful! Many herbicides can cause damage to waterways and wetlands. Check the herbicide label directions carefully before use near waterways and wetlands. For more information see Guidelines for Safe and Effective Herbicide Use Near Waterways.

Herbicide brands and concentrations

Herbicides are referred to by the active chemical ingredient in the following table. The product trade names in this publication are supplied on the understanding that no preference between equivalent products is intended and that the inclusion of a product does not imply endorsement by DPIPWE over any other equivalent product from another manufacturer. Information on available brands containing the herbicide you require should be obtained from a reputable herbicide supplier or the APVMA website at www.apvma.gov.au

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There may be a number of products with the same active ingredient some with alternate formulations (concentration) registered for control of a weed eg: Glyphosate 360 g/L, Glyphosate 450 g/L may be registered for use on the same weed. Alternate formulations such as these will have a different application rate. ALWAYS check the label.

Boom spray application

Stage of Growth	Herbicide (active ingredient)	Example of commercial product (concentration of active ingredient)	Application rate of commercial product	Withholding period	Comments
Seedling (up to 4 leaf)	MCPA/ diflufenican	Tigrex® (250/25 g/L)	1.0 L/ha	7 days	Consult with you agronomist for clover and oat tolerance. Efficacy on larger weeds will be improved by grazing with stock after the 7 day withholding period.
Rosette	2,4-D amine	(500 g/L)	1.8 L - 2.8 L/ha	7 days	Spray rosettes or before plants have 10 leaves. Later stages hard to kill. The use of MCPA is preferred to 2,4-D (amine and ester) in situations where legumes are undersown in the crop. THIS PRODUCT MAY ONLY BE USED FROM 15 APRIL TO 15 SEPTEMBER UNLESS PERMITTED BY THE CHEMICAL REGISTRAR- DPIPWE.
Seedlings (2-6 leaf stage)	2,4-DB	Buttress® (500 g/L)	1 - 3.2 L/ha	4 weeks	Use lower rates for 2-4 leaf stage. Do not sow pasture seed for at least 14 days after application. Consult with your agronomist to determine suitability for use on certain Medic and Clover cultivars. THIS PRODUCT MAY ONLY BE USED FROM 15 APRIL TO 15 SEPTEMBER UNLESS PERMITTED BY THE CHEMICAL REGISTRAR- DPIPWE.
Seedling to Rosette	2,4-D ester	Estercide® Xtra 680 (680 g/L)	800 ml - 1.7 L/ha	7 days	Do not sow pasture seed for at least 21 days after application. Consult with your agronomist to determine suitability for use on certain Medic and Clover cultivars. THIS PRODUCT MAY ONLY BE USED FROM 15 APRIL TO 15 SEPTEMBER UNLESS PERMITTED BY THE CHEMICAL REGISTRAR- DPIPWE
Rosette to early flowering	Metsulfuron-methyl	Brush-Off Brush Controller® (600 g/L)	15 g/ha	nil	Will damage legumes in pastures. Always use a non-ionic surfactant in accordance with label. May not be able to establish clover or other pasture legumes on treated areas for up to 12 months after application
Flowering	Ticlopyr + Picloram + Aminopyralid	Grazon Extra Ticlopyr (300 g/L), Picloram (100 g/L), Aminopyralid 8 g/L)	250 ml/100 L water	3 days – 6 weeks (refer to label)	Note that Picloram remains active in the soil for extended periods and may leach into groundwater.
Seedlings to shooting plants	Glyphosate	(540 g/L )	1.5 L/ha – 2 L/ha	-	Use higher rates on weeds over 15cm in height or diameter. Addition of adjuvant required in accordance with label. Is not residual therefore may need repeat treatments to control later germinating weeds.
Prior to flowering	Dicamba	(500 g/L)	4 L/ha	7 days	Addition of adjuvant required in accordance with label.

Spot Spraying

Situation	Herbicide (active ingredient)	Commercial product example (content of active ingredient)	Application rate of commercial product	Withholding period	Comments
Seedling to rosette	Dicamba	(200g/L)	60 ml/15 L water	7 days	Lower rate on seedlings, higher rate on rosettes
	2,4-D ester	Estercide® Xtra 680 (680 g/L)	8 ml - 17 ml/10 L water	7 days	Thorough wetting of weed is essential. Do not sow pasture seed for at least 21 days after application. Consult with your agronomist to determine suitability for use on certain Medic and Clover cultivars. THIS PRODUCT MAY ONLY BE USED FROM 15 APRIL TO 15 SEPTEMBER UNLESS PERMITTED BY THE CHEMICAL REGISTRAR- DPIPWE
Rosette	2,4-D amine	(500 g/L)	18 ml - 28 ml/10 L water	7 days	Spray rosettes or before plants have 10 leaves. Later stages hard to kill. Do not sow pasture seed for at least 14 days after application. The use of MCPA is preferred to 2,4-D (amine and ester) in situations where legumes are undersown in the crop. Avoid spray or vapour drift reaching crops such as grape vines, tomatoes, vegetables, poppies or flower crops THIS PRODUCT MAY ONLY BE USED FROM 15 APRIL TO 15 SEPTEMBER UNLESS PERMITTED BY THE CHEMICAL REGISTRAR- DPIPWE.
Flowering	Ticlopyr + Picloram + Aminopyralid	Grazon Extra Ticlopyr (300 g/L), Picloram (100 g/L), Aminopyralid 8 g/L)	25 ml/10 L water	nil	Spray when flowering. Note that Picloram remains active in the soil for extended periods and may leach into groundwater.
Seedlings to shooting plants	Glyphosate	(540 g/L formulations)	50 – 70 ml/15 L water		Use higher rates on weeds over 15 cm in height or diameter. Addition of adjuvant required in accordance with label. Is not residual therefore may need repeat treatments to control later germinating weeds
	Sulfmeturon	Oust® (750 g/kg)	3 – 6 g/15 L water	Not to be used on pasture	Addition of adjuvant required in accordance with label. Use higher rate for dense infestations or where weeds are greater than 15 cm diameter May be mixed with glyphosate.
Rosette to early flowering.	Metsulfuron-methyl	Brushkiller 600® (600 g/L) Brush-Off Brush Controller® (600 g/L)	5 g/100 L water	nil	Will damage legumes in pastures. Always use a non-ionic surfactant in accordance with label. May not be able to establish clover or other pasture legumes on treated areas for up to 12 months after application.
Flowering	Ticlopyr + Picloram + Aminopyralid	Grazon Extra Ticlopyr (300 g/L), Picloram (100 g/L), Aminopyralid 8 g/L)	25 ml/10 L water	3 days – 6 weeks (refer to label)	Spray when flowering. Note that Picloram remains active in the soil for extended periods and may leach into groundwater.
	Glufosinate- ammonium	Basta® (200 g/L)	45 ml/ 15 L	Not to be used on pasture.	Thorough coverage of weed is essential for good control.

Important Disclaimer

To the extent permitted by law, the Tasmanian Department of Primary Industries, Parks, Water and Environment (including its employees and consultants) excludes all liability to any person for any consequences, including but not limited to all losses, damages, costs, expenses and any other compensation, arising directly or indirectly from using information or material (in part or in whole) contained on this website.

Paterson's Curse and Viper's Bugloss Control Guide

Weeds Index

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