title: Morphometric variation between populations of the balsam woolly aphid, Adelges piceae (Ratzeburg) (Homoptera: Adelgidae), in North America.
mesh_terms: D000704:Analysis of Variance; D000818:Animals; D001042:Aphids / Q000033:anatomy & histology*; D001699:Biometry; D014644:Genetic Variation; D009656:North America