Figure 4

Occurrence of multiple seasonal spatial clusters of vector abundance during 2000-2006. The spatial cluster analysis was performed with the $G_i^{*}\left(d\right)$ function based on inverse of distance (see methods for more detail). Red scale - hot-spots (clustering of traps with high mosquito abundance). Blue scale - cold-spots (clustering of traps with low mosquito abundance). Urban areas, rice fields, and the Po River were also included.