If you see any of these water plants, or others appear to be spreading rapidly, note their location and notify the nearest office of Agriculture Western Australia. Aquarium and pond owners Do not dispose of any plant from your aquarium or pond in or near any waterway or drain. Apart from horsetail, all of these plants can be killed by being dried out on newspaper. When the plants are dead, bury them or dispose of them with other green waste in accordance with Council by-laws. Salvinia and water hyacinth can also be killed by composting.
Horsetails are extremely difficult to kill.
Apart from environmental damage they cause, aquatic weeds are extremely expensive to eradicate. It cost more than a quarter of a million dollars to eliminate hydrocotyl from Western Australia's Canning River. Report suspect plants. Internet See Agriculture Western Australia's Weed Science Website for the latest information. Plant Protection Society of WA, Perth.