Herbicides for Serrated Tussock Control

Serrated Tussock, image: Andrew CraneThese 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

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.

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.

Foliar spray application

Stage of Growth
Herbicide
(active
ingredient)
Example of commercial product (concentration of active ingredient)
Application rate of commercial product
Withholding
period
Comments
While actively growingFlupropanateFrenock®, Taskforce® (745 g/Kg)2 ml/L14 daysEnsure that spray completely wets all leaf surfaces.

Very slow acting; results may not be evident for several months after application.

Adequate ground moisture is required to transport chemical into root zone for uptake .

Will kill annual grasses and some native grasses.
GlyphosateRound-Up Biactive®, Weedmaster Duo® (360 g/L)7 - 13 ml/LnilMay to October.

Suitable for use near waterways.

Non-selective and will damage or kill trees and grasses that come into contact with spray.
Round-up (360 g/L)May to October.

Non-selective and will damage or kill trees and grasses that come into contact with spray.

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
While actively growingFlupropanateFrenock®, Taskforce® (745 g/Kg)2 L/ha4 monthsSpray between October and February.
Boom spray in summer when improved grasses are dormant (to reduce pasture damage).

Ensure that spray completely wets all leaf surfaces.

Very slow acting; results may not be evident for several months after application.
GlyphosateRound-Up (360 g/L)4 - 6 L/hanilMay to October.

Non-selective and will damage or kill trees and grasses that come into contact with spray.

Addition of a wetting agent may improve control.

Use lower rate on serrated tussock regrowth after fire and higher rate on slashed plants where some residual dead foliage remains.
PowerMax®
(540 g/L)
2.7 - 4L/ha

Aerial spray application

Stage of Growth
Herbicide
(active
ingredient)
Example of commercial product (concentration of active ingredient)
Application rate of commercial product
Withholding
period
Comments
While actively growingFlupropanateFrenock®, Taskforce® (745 g/Kg)2 ml/L4 monthsSpray between October and February.

Very slow acting; results may not be evident for several months after application.

Will kill annual grasses and some native grasses.

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