| REPORT THE PRESENCE OF THIS PEST BEFORE UNDERTAKING CONTROL |
Information about this pest can be found on the shield pennywort: 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 | Any time when green leaf surface exposed:
Actively growing plants:
|
| Herbicide: Diquat (Group L) | |
| Active ingredient | 200g/L diquat |
| Rates of dilution for spot spraying | 1:100 |
| Amount of product/10L water | 100mL |
| Rate of product/ha | 10L |
| Wetting agent dilution | 1:400 |
| Time of application | Any time when green leaf surface exposed |
| Remarks | Not very effective on large areas because regrowth occurs. Higher rates of 50L/ha to a water depth of 1m may work but expensive. |
| Herbicide: Roundup® Biactive, Razor® (Group M) | |
| Active ingredient | 360g/L glyphosate |
| Rates of dilution for spot spraying | 1:100 |
| Amount of product/10L water | 100mL |
| Rate of product/ha | 10L |
| Time of application | Actively growing plants |
| More information and other control methods | Addition of chlorsulfuron or metsulfuron methyl at 1g/10L to glyphosate gave 98–100% control in experiments on Hydrocotyle ranunculoides, but not registered for use over water bodies. Also picloram + 2,4-D amine gave good control. |