Neighbour-joining phylogenetic analysis of carboxyl/cholinesterases from Trialeurodes vaporariorum (Tv) and other insect species (accession numbers are given). Bootstrap values next to the nodes represent the percentage of 1000 replicate trees that preserved the corresponding clade. Positions containing alignment gaps and missing data were eliminated only with pairwise deletion. Acyrthosiphon pisum (Ap), Bemisia tabaci (Bt), Nasonia vitripennis (Nv), Spodoptera littoralis (Sl), Tribolium castaneum (Tc). Acyrthosiphon pisum sequences were taken from http://www.aphidbase.com/aphidbase.