Sagittaria control

Page last updated: Monday, 20 July 2020 - 1:57pm

Please note: This content may be out of date and is currently under review.

Control methods for Sagittaria (Sagittaria platyphylla) a declared pest in Western Australia.

Information about this pest can be found on the Sagittaria: declared pest page.

Chemical requirements

When using any agricultural chemicals please ensure that you always follow instructions on the label and any permit. Users of agricultural chemical products must always strictly comply with the directions on the label and the conditions of any permit. To view permits or product labels go to the Australian Pesticides and Veterinary Medicines Authority website.

Chemical control options

Chemical control options can be found below. For other methods of control please refer to the aquatic weed control page.

Recommended herbicides

  • Metsulfuron
  • Glyphosate

Herbicide: Metsulfuron methyl (Group B) (various trade names: see APVMA link)

Active ingredient

600g/kg metsulfuron methyl 

Amount of product/10L water


Wetting agent distribution

10mL Synertrol® surfactant

Time of application

  • Apply during summer when wet areas are reduced
  • Re-treat no more than three times a year and leave at least 30 days between treatments

More information

  • Direct treatment of plants only
  • Apply to wetlands, swamps fresh (non-potable) water

Herbicide: Glyphosate (Group M) (various trade names: see APVMA link)

Active ingredient

360g/L as isopropylamine and mono-ammonium salts. Only products registered for aquatic use.

Amount of product/10L water


Wetting agent dilution

No wetting agent required

Time of application

Apply up to three times a year. Apply as a spot treatment to the weeds by spray or wiper technique.


Registered for Sagittaria graminea in specific areas in Victoria and New South Wales under a minor use permit from APVMA

More information

Do not treat submerged weeds

Contact information

Pest and Disease Information Service (PaDIS)
+61 (0)8 9368 3080