Herbicides for Whiteweed Control

Disclaimer

Flowering whiteweed, image: Saint Mary's College of CaliforniaThese 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 / or non-cropping situations 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

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 Rivercare: guideline for safe and effective herbicide use near water.

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 but 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, commercial and / or industrial areas

Stage of weed growth
Herbicide
(active
ingredient & concentration)
Example of commercial product
Application rate of commercial product
Withholding
period
Comments
Late rosette
to
pre-flowering
2,4-D ester (600 g/L)LV Estericide® 600Per ha 1.9-2.4 L/ha7 daysClover must be well covered by the grass or extensive damage may result.

THIS PRODUCT MAY ONLY BE USED FROM 15 MAY TO 15 SEPTEMBER UNLESS PERMITTED BY THE CHEMICAL REGISTRAR - DPIPWE.

Thorough wetting of weed is essential.
Knapsack spot spray
19-24 ml per 10 L water per 100m2
Late rosette to flowering stage
(late July to September)
Glyphosate
(360 g/L)
Weedmaster® Duo High vol. spray
500 ml/100 L
Note: Glyphosate is a non-selective herbicide. Boom spray apply ONLY where full soil disturbance is intended to follow e.g. prior to re-sowing pasture.

Plants should be actively growing and not under stress of drought, frost or waterlogging.

Addition of a surfactant in accordance with label is recommended.
Knapsack
5 ml/L
i.e
75 ml/15 L
Glyphosate
(360 g/L)
Roundup Biactive® Wiper application

1 L with 2 L clean water
7 daysNote: Glyphosate is a non-selective herbicide. Non-target plants wiped may be killed.

Wiper application may be used where sufficient stem elongation occurs.
Plants should be actively growing and not under stress of drought, frost or waterlogging.

Adhere to instructions on product label.
Immediately prior to floweringAmitrole
(250 g/L)
+
Ammonium thiocyanate (220 g/L)
Amitrole T
Weedeath
1.1 L in 100 L waterDO NOT GRAZEApply when weeds are actively growing.
Knapsack
165 ml/15L

Pasture containing legume

Stage of weed growth
Herbicide
(active
ingredient & concentration)
Example of commercial product
Application rate of commercial product
Withholding
period
Comments
Late rosette
to
pre-flowering
2,4-D ester (600 g/L)LV Estericide® 600Per ha
460-900 ml/ha
7 daysClover must be well covered by the grass or extensive damage may result.

THIS PRODUCT MAY ONLY BE USED FROM 15 MAY TO 15 SEPTEMBER UNLESS PERMITTED BY THE CHEMICAL REGISTRAR - DPIPWE.

Thorough wetting of weed is essential.
Knapsack spot spray
19-24 ml per 10 L water per 100m2

Non-legume pasture

Stage of weed growth
Herbicide
(active
ingredient & concentration)
Example of commercial product
Application rate of commercial product
Withholding
period
Comments
Late rosette
to
pre-flowering
2,4-D ester
(600 g/L)
LV Estericide® 600Per ha
1.9-2.4 L/ha
7 daysTHIS PRODUCT MAY ONLY BE USED FROM 15 MAY TO 15 SEPTEMBER UNLESS PERMITTED BY THE CHEMICAL REGISTRAR - DPIPWE.

Thorough wetting of weed is essential.
Knapsack spot spray
19-24 ml per 10 L water per 100m2
2,4-D amine
(625 g/L)
Ken-Amine 625
Amicide® 625
Per ha
1.4-1.7 L/ha
7 daysTHIS PRODUCT MAY ONLY BE USED FROM 15 MAY TO 15 SEPTEMBER UNLESS PERMITTED BY THE CHEMICAL REGISTRAR - DPIPWE.
Glyphosate
(360 g/L)
Roundup Biactive® Wiper application
1 L with 2 L clean water
Note: Glyphosate is a non-selective herbicide. Non-target plants wiped may be killed.

Wiper application may be used where sufficient stem elongation occurs.

Plants should be actively growing and not under stress of drought, frost or waterlogging.

Adhere to instructions on product label.
Dicamba
(500 g/L)
+
2,4-D Amine
(625 g/L)
Kamba 500
Plus
Amicide® 625
Per ha
280 ml/ha
+
640 ml/ha
7 daysWhen applying by boom spray use 110 to 280 litres of mixture per hectare.

Addition of a surfactant in accordance with label is recommended.
High vol. spray
20 ml
+
50 ml/100 L water
knapsack
6 ml
+
12 ml/15 L
Immediately prior to floweringMCPA
(250 g/L)
MCPA 250
Selective Herbicide
Per ha
8.5 L
7 daysDO NOT use in situations where damage to susceptible crops may occur.
DO NOT contaminate streams, rivers or waterways with the chemical or used container.
knapsack
350 ml/15 L water
Dicamba
(340 g/L)
+
MCPA
(80 g/L)
Kamba MPer ha
4 -7 L/ha
7 daysWhen necessary a second treatment may be made after 4 weeks.
High vol. spray
470 ml/100 L water
knapsack
100 ml /15 L

Prior to fallow and re-sowing of pasture

Stage of Growth
Herbicide
(active
ingredient & concentration)
Example of commercial product
Application rate of commercial product
Withholding
period
Comments
Late rosette to flowering stage
(late July to September)
Glyphosate
(360 g/L)
Weedmaster® Duo Per ha
1.5 L/ha
Refer labelBoom spray application

Note: Glyphosate is a non-selective herbicide. Boom spray apply ONLY where full soil disturbance is intended to follow e.g. prior to re-sowing pasture.

Plants should be actively growing and not under stress of drought, frost or waterlogging.

Application may be integrated with long fallow. Cultivation may start 7 days after spraying.

Addition of a surfactant in accordance with label is recommended.
Glyphosate
(540 g/L)
Potassium salt
Roundup PowerMax®Per ha
1.25-2 L/ha
Refer labelBroadacre application

Add surfactant/ wetting agent in accordance with product label

Non-cropping and bushland

Stage of Growth
Herbicide
(active
ingredient & concentration)
Example of commercial product
Application rate of commercial product
Withholding
period
Comments
Actively growing to matureGlyphosate *
(360 g/L) where product has an aquatic registration
Weedmaster® Duo
Roundup Biactive®
High vol. spray
500 ml/100 L
Note: Glyphosate is a non-selective herbicide. Boom spray apply ONLY where full soil disturbance is intended to follow e.g. prior to re-sowing pasture.

In accordance with APVMA Permit PER8949 spot spraying / knapsack add surfactant/ wetting agent in accordance with product label.
Knapsack
5 ml/L
i.e
75 ml/15 L knapsack
Metsulfuron-methyl*
(600 g/Kg)
Associate® / Ken-Met 600/ Brush-off®5-10 g in 100 L water
plus
surfactant
In accordance with APVMA Permit PER8949 spot spraying / knapsack add surfactant/ wetting agent in accordance with product label.
MCPA*
(500 g/L)
MCPA 500 L20-50 ml/10 L7-10 daysIn accordance with APVMA Permit PER8949 spot spraying / knapsack/ wick wipe.
* 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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