Southeast Asian has a diverse ecology that is unrivaled by any other. The region is, however, coming under increased threat from invasive alien species which have wreaked havoc on forests and arable land. The invasive alien species have been able to spread to China, New Zealand, the United States, Thailand, India, Canada, Australia, Malaysia, the United Kingdom, Japan and Philippines. In response to the impact these invasive species have had on the economy, ecosystems and livelihoods, strategies have been formulated to mitigate the spread of the species. The strategies are based on an understanding of the way these species are spread, the status of infestation, the impact and the various phytosanitary risks. It is important, however, that strategies should be formulated together with encompassing laws and policies. These laws and strategies should facilitate the accessibility of information, public education, inspection and treatment technologies as ways of fighting the spread of invasive alien species.