Australians have been urged to defend their native landscapes against an insidious invasion of slow-spreading weeds. A new study by Dr Joe Bennett from the ARC Centre of Excellence for Environmental Decisions (CEED) and The University of Queensland reveals that exotic weeds that spread slowly and are unable to travel long distances can potentially cause just as much damage to native plants as fast-spreading weeds.

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[chinese violet (Asystasia gangetica) pictured]