The tenacious and troublesome Crofton weed (Ageratina adenophora), as it is commonly known, has been running rampant in eastern coastal Australia since it ‘escaped’ from being an ornamental plant in Sydney gardens.
It has taken hold on Lord Howe Island, a World Heritage Area, where it is found mainly in non-accessible areas, making manual removal and herbicide control impractical.
Crofton weed is a serious environmental weed that has invaded agricultural lands as well as 150 reserves in NSW managed by the National Parks and Wildlife Service (NPWS). It reduces the ecological value of bush land but also affects grazing land on farms by diminishing their carrying capacity.
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<table style="border:1px solid;padding:2px; width:310px;" ><tr><td><a href="https://www.scienceimage.csiro.au/image/2201/"><img src="https://www.scienceimage.csiro.au/images/embed/300_0_PL2201.jpg" width="300" alt="Crofton weed leaf affected by Crofton rust fungus." style="margin: 0 0 5px 0; border: 0px;"></a><br/><a href="https://www.scienceimage.csiro.au/image/2201/">Crofton weed leaf affected by Crofton rust fungus.</a><br />by CSIRO</td></tr></table>
Crofton weed leaf affected by Crofton rust fungus.