The world, showing the climate suitability for the oat aphid <i>Rhopalosiphum padi</i> estimated using a CLIMEX model.

<p>The model was parameterised for the sexual mode of reproduction and shows; (a), the Ecoclimatic Index, indicating the potential distribution of sexual populations (potential for year round persistence EI>0); and (b), the annual Growth Index GI_A indicating areas that are suitable for growth at some point during the year (GI_A>0). This model does not include data about the presence of a suitable primary host plant.