The Pacific Invasives Initiative Project is urging Pacific countries to act quickly to control the rapidly spreading African Tulip Tree.
The tree is fast becoming a pest in the region, posing a threat to native forests and farm land.
The Initiative's co-ordinator, Bill Nagle, says the tree may have a beautiful flower but it also bears fruit that produces thousands of seeds that are easily dispersed by wind.
Mr Nagle says any infestation should be dealt with immediately, either by digging it out or the use of a biocontrol agent or herbicide.
"If you see one tree, get rid of it straight away. Don't wait. Too often we see people standing around saying 'oh well, we are not sure if this is going to be a problem, let's wait and see' but in actuality we know from the countries where it is already a problem, that once established in any country it is going to be a problem."
Bill Nagle says Pacific countries are being bombarded by a range of invasive species, including fire ants.