Maximum-Likelihood (Kimura-2 parameter model) phylogenetic tree of the nuclear DNA 28S gene for armyworm collected at different sites. The solid diamonds indicate samples that were infected with Wolbachia. Samples had H1 haplotypes, unless otherwise indicated. The scale bar represents a 20% estimated difference in nucleotide sequence. Numbers given at each node correspond to the percentage bootstrap values (for 1000 repetitions). Replicate numbers of <60% were not included in the figure. The nymphalid Hypolimnas bolina is used as an outgroup.