Figure 2.

Number of known hosts for pests in each of each of nine major groups. The empirical cumulative distributions for number of known hosts for bacteria, fungi, and oomycetes (microbial pathogens) do not differ significantly from each other (K-S test, P > 0.08 for all), and the distributions for insects, mites, mollusks, nematodes, viruses, and plants (pests + viruses) do not differ significantly from each other (P > 0.15 for all). The microbial pathogen distributions differ significantly from all the pests+virus distributions (P < 0.035 for all) except for bacteria versus mites, mollusks, and nematodes (P > 0.08). Details given in Fig. S1.