There have been over 1,400 releases of natural control agents against weeds around the world. In all, more than 400 different agents have been released against more than 150 different target weeds. CABI is a world expert in natural control and played a vital role in the development of an International Code of Conduct on the use of it. CABI also has a very good international track record of researching and releasing natural control agents. In countries like the US, Canada, Australia and New Zealand natural control is often viewed as the first line of defence when a new and problematic invasive species is identified.