The trumpet tree (Cecropia peltata) is a small weedy tree from humid tropical America, which was introduced to Africa around 1910. For half a century after introduction, the trumpet tree remained a welcome guest in West and Central Africa, spreading only very slowly, before it began to invade...

This paper briefly presents the potential pathways for spread of Chromolaena or Siam weed (Chromolaena odorata), including movement of equipment, farm stock, vehicles, machinery, contamination of seeds, backpackers camping in infested areas, and use of Tully River sand unsterilized in potting...

This paper explains what makes ragworts (Senecio spp.) successful colonizers. It describes the suitability of their fruits for dispersal, particularly, the longevity of its fruits and their ability to survive long-distance transport by man and animals. The role of the wool-trade in their spread is...