WEED BUSTER: Department of Primary Industries best practice officer, aquatic weeds, Elissa van Oosterhout, with problem weed sa
WEED BUSTER: Department of Primary Industries best practice officer, aquatic weeds, Elissa van Oosterhout, with problem weed sa

Weed attracts attention



'Super' weed attracts attentionIT'S capable of doubling in size in a week, can cover a five-metre circular pond in two weeks, choke waterways, reduce oxygen and starve natural vegetation of light.

And this week it attracted leading weed controllers from all parts of the North Coast, Brisbane and the CSIRO to Grafton to determine how it could be best controlled.

The weed is salvinia molesta, a South American plant brought to Australia for fish tanks and ponds, but got out of control and has been plaguing North Coast waterways for more than 20 years.

Department of Primary Industries best practice officer, aquatic weeds, Elissa van Oosterhout said the aim of the Grafton workshop was to help weed control authorities develop the best control methods.

There are only three; physical removal, biological control (through weevils) and herbicides.

Ms Oosterhout said salvinia could be controlled through a combination of the three processes, but doubted it would ever be eradicated.



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