The role of arboreta in studying the evolution of host resistance to the hemlock woolly adelgid
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Arnoldia. 65(3): 2-9.
The hemlock woolly adelgid, Adelges tsugae, is an introduced pest of hemlock which is, unfortunately, all too familiar to many readers of Arnoldia. Adelgids are a small family of sucking insects, related to aphids, which feed only on conifers. Because they are so small and typically not very common, most adelgids usually go completely unnoticed by all but a handful of entomologists that specialize on them.
Havill, Nathan P.; Montgomery, Michael E. 2008. The role of arboreta in studying the evolution of host resistance to the hemlock woolly adelgid. Arnoldia. 65(3): 2-9.