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Home > Invasive Species > Weeds > Pampas - Herbicides for Control

Herbicides for Pampas Grass Control

Pampas flowering plant, image: Karen Stewart, DPIPWE

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, visit 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 are listed in the following table. Care must be taken in using herbicides as non-target plants contacted may be harmed. For recommendations in specific crops consult an agronomist.

Wetting agents

Carefully consult the product label for specific directions regarding the use of wetting agents or 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.

Agricultural non-crop, domestic, commercial, industrial and public service areas

Stage of Growth	Herbicide (active ingredient)	Example of commercial product (concentration of active ingredient)	Application rate of commercial product	Withholding period	Comments
While actively growing	Glyphosate	Round-Up Biactive®, Weedmaster Duo® (360 g/L)	100-130 ml/10 L	nil	Knapsack Suitable for use near waterways. Non-selective and will damage or kill trees and grasses that come into contact with spray. Apply in spring, summer or autumn to actively growing plants. Ensure complete coverage of the foliage. Best results are obtained if plants are sprayed at flowering. Use the lower rate for plants under 1 m tall and the higher rate for larger plants. Plants may be cut prior to application but regrowth must be at least 1 m prior to spraying. Addition of adjuvant required in accordance with label.
		Round-Up Biactive®, Weedmaster Duo® (360 g/L)	1.0-1.3 L/100 L	nil	Handgun High volume application Instructions as above
		Round-up PowerMax® (540 g/L)	66-87 ml/10 L	nil	Knapsack NOT suitable for use near waterways. Non-selective and will damage or kill trees and grasses that come into contact with spray. Instructions as above
		Round-up PowerMax® (540 g/L)	660-870 ml/100 L	nil	Handgun High volume application. Instructions as above.

Non-cropping and bushland

Stage of Growth	Herbicide (active ingredient)	Example of commercial product	Application rate of commercial product	Withholding period	Comments
While actively growing	Glyphosate * (360 g/L) where product has an aquatic registration	Round-Up Biactive®, Weedmaster Duo® (360 g/L)	10-13 mL per litre water	nil	Spot spraying / knapsack In accordance with APVMA Permit PER8949 Suitable for use near waterways. Non-selective and will damage or kill trees and grasses that come into contact with spray. Addition of adjuvant only in accordance with label.

* These products are not registered for this application method in Tasmania and will not be mentioned on product labels, however Permit Number – PER8949 issued by the Australian Pesticides & Veterinary Medicines Authority has been issued for this specific use. If using this method and herbicide you will require a copy of this off-label permit.

For further information on permit details visit the APVMA website at www.apvma.gov.au

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.

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This page - http://www.dpipwe.tas.gov.au/inter.nsf/WebPages/LBUN-8AU32V?open - was last published on 30 April 2013 by the Department of Primary Industries, Parks, Water and Environment. Questions concerning its content can be sent to Internet Coordinator by using the feedback form, by mail to GPO Box 44, Hobart, Tasmania, Australia 7001, or by telephone.

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