Table 1.

Likelihood of correct regulatory decision to approve or reject introduction of test plant species countries (adapted from Gordon et al. 2008)

Status of test species	Number of species approved	Number of species rejected	% of correct decisions
Major invasive species	4	326	99
Non-invasive species	382	41	90

Data is pooled from separate weed risk assessment tests in Australia, New Zealand, Hawaii and Pacific Islands, the Czech Republic, the Bonin Islands of Japan and Florida. Regulatory decisions to require further information are excluded