What is Chromolaena?
Biological Control
Differences between AWA and SA chromolaena
Workshops
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Useful links
The last two International Workshops (Australia, 2003 and Taiwan, 2006) have incorporated other Eupatorieae that have become invasive in tropical and subtropical regions. The Australia workshop considered Chromolaena squalida and Praxelis clematidea, while the Taiwan workshop looked at Mikania micrantha. Here, therefore, is some basic information and links on these species, all of which originate in the Americas:
Chromolaena squalida.Photo: Michael Day, QDPIF
Ageratina riparia. Photo: Walter Stahel, Bay of Plenty, New Zealand
Mikania micrantha. Photo: Colin Wilson
Austroeupatorium inulifolium. Photo: Colin Wilson
Ageratina adenophora
Praxelis clematidea Photo: Colin Wilson
If you have found a plant that you think may be Chromolaena odorata or one of the other related species described on this site, please inform us. These plants are easiest to identify when in flower, but outside of the flowering season it is also possible. Please include at least one close-up photograph of leaves and/or flowers, as well as locality details (nearest towns, country and coordinates if possible) and the date of observation. Send these to the IOBC Working Group convener at ZachariadesC@arc.agric.za. Preserving a pressed herbarium specimen is also desirable; this can be lodged with your local herbarium for future reference.
