This file contains the supporting information for this article including Figures A and B and Tables A and B.

Figure A, Climate suitability for Helicoverpa armigera in Australia modelled using CLIMEX for A) Establishment, and B) Population growth in relation to its known distribution. Point locations indicate the goodness of fit of the model. Figure B, Global climate suitability for Helicoverpa armigera modelled using CLIMEX for A) Establishment, and B) Population growth in relation to its known distribution. Point locations and shaded areas indicate the goodness of fit of the model. Table A, CLIMEX Parameter Sensitivity for Helicoverpa armigera. Table B, Frequency of interceptions of Helicoverpa armigera in the United States by inspected host. (DOCX)