Weeds in Australia

Publications and resources

Alligator weed (Alternanthera philoxeroides) weed management guide

Weeds of National Significance
Department of the Environment and Heritage and the CRC for Australian Weed Management, 2003
ISBN 0 9587 0109 1

PDF file

About the guide

Alligator weed is a Weed of National Significance. It is regarded as one of the worst weeds in Australia because of its invasiveness, potential for spread, and economic and environmental impacts. It is an especially troublesome weed because it invades both land and water, and is very hard to control.

Alligator weed can grow with roots embedded in the bank or on the bottom of shallow water bodies, or float freely on the water surface. It spreads its leaves across the water surface, forming dense mats. The long spreading stems are hollow, helping it to float. The roots are thin and stringy, and trail in the water from the joints between plant segments (the nodes).

This management guide was prepared in 2003. The state and territory contacts in this document may be out of date.

For advice on weed control in your state or territory see the primary contacts on the State and territory weed management arrangements page.

Contact details

Andrew Petroeschevsky
National Coordinator Aquatic Weeds
NSW Department of Primary Industries
Grafton Agricultural Research & Advisory Station
PMB 2, Grafton, NSW 2460
Phone: (02) 6640 1618 Mobile: 0429 455 282

Extent in Australia Potential distribution
WA, NT, QLD, NSW, VIC, SA, TAS Could further expand in current locations
Cover of Alligator weed (Alternanthera philoxeroides) - Weeds of National Significance - Weed Management Guide

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