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Author Topic: Water Hyacinth in the Dumaresq River  (Read 1978 times)

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Water Hyacinth in the Dumaresq River
« on: April 26, 2014, 12:35:51 PM »
Water Hyacinth in the Dumaresq River

In 2011 water hyacinth was found in the Dumaresq River on the New South Wales and Queensland border upstream of Bonshaw. It is thought that these plants washed out of a farm dam located in the catchment of the Dumaresq River in a flood. To date the original source of these plants has not been found.

Water hyacinth is one of the Worlds worst water weeds with the ability to completely choke waterways. The seeds of water hyacinth can last for up to 30 years and once established infestations are difficult and expensive to control.

The discovery of water hyacinth in this river at the top of the Murray Darling River system resulted in a rapid response from New South Wales and Queensland Local and State government agencies to control and prevent the spread of this water weed.

These control efforts involved undertaking surveillance of the river to ascertain the extent of the water hyacinth infestation and then the control of the plants found. As part of the containment and control effort several booms were erected to contain the water hyacinth plants floating down stream. These plants were then removed and destroyed. As a result of this concerted effort no water hyacinth has been found on the Dumaresq River since August 2013.

As part of the surveillance and control effort fishers who fish in the Dumaresq River have been active in reporting suspected water hyacinth plants and this has aided in the discovery and control of this water weed.

Even though no plants have been found since August 2013 it is still too early to consider this infestation as eradicated. Fishers are encouraged to be alert for and report any suspected water hyacinth plants to either the local council or NSW DPI on 1800 680 244 or For further information on water weeds visit

One of the booms used to catch the water hyacinth plants. Photo taken by Tom Macindoe.

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