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Stamping out Mimosa a main concern for Moree

North West Local Land Services is working with the Gwydir Valley Irrigator’s Association (GVIA) and B&W Rural to stamp out Mimosa with the establishment of trial plots to demonstrate management options for Mimosa in natural grasslands along travelling stock routes in the Moree Plains region.

Control of Mimosa, an emerging species which can invade and adversely affect agriculture enterprises, is critical for landholders. This large scale demonstration of Mimosacontrol and management in the Gwydir region is focused around on-ground works for trialing multiple management techniques over a three year period and will demonstrate cost effective control treatments and management options.

The Mimosa Management Trial is an outcome from a Mimosa Field Day which the GVIA hosted in December 2014. Growers highlighted their biggest concerns in relations toMimosa were the cost of control and the degree of success. Specifically they requested a commercial control trial on larger areas of 5-10Ha as well as a review and analysis of the control of Mimosa in the Moree Plains area.

According to Lou Gall, Project Officer at Gwydir Valley Irrigators Association, “The Mimosa Management Trial requested by growers who attended the GVIA Mimosa Field Walk is an ideal example of agricultural producers working together to address a natural resource management challenge.

“In the last 20 years the infestation of Mimosa has significantly increased with it now affecting large areas of once productive grazing and farming land competing for nutrients and moisture”, she said.

The Mimosa Management Trial aims to include six different treatments and management techniques including, but not limited to:

  • Mechanical and chemical (using mulch and cut spot spray)
  • Mechanical and chemical follow up (mulch and spray regrowth)
  • Chemical (spray application)
  • Pellet

Additional to these four treatments the trial includes two sites of 5Ha each where a mechanical treatment is applied. One site will use a Cutter Bar and the second site will use a Blade Plough – both techniques having proven highly successful.

An invasive native species, Mimosa is a branched, spiny perennial shrub that grows up to 6m high and is spread by seeds that float on water, attach to hair and clothing, pass undigested through animals and are moved in mud attached to vehicles and machinery. It grows quickly and once Mimosa becomes established, it dominates vegetation, is very difficult to control and spreads readily.

Emily Doolan, North West Local Land Services ’ Senior Land Services Officer, said, “The results of the trial will demonstrate management and cost options including an economic comparison of the effectiveness of each management technique, possibly including scattered, low, medium or high density infestations”.

“Mimosa is not an easy weed to eradicate – treatment needs to not only be the right treatment, but also at the right time.  We aim to establish the best possible treatment and encourage landholders to walk through the site and see the results of different treatments we have in process”, she said.

“Getting on top of Mimosa early can literally save thousands of dollars in the long run”.

The project site is located on travelling stock reserves adjacent to the Gwydir Highway approximately 5-10km east of Moree.

Approval may be required prior to clearing Invasive Native Species, please contact your Local Land Services for further information.

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