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Dichotomous Key to Pea Aphid (Acyrthosiphon pisum) Apterous Parthenogenic Instars
Bates College Department of Biology, Daisy Diamond, and Daniel Levitis
We provide a dichotomous key, with photographs and illustrations, for distinguishing between instars of the pea aphid (Acyrthosiphon pisum) in the developmental pathway leading to the apterous parthenogenetic adult. Lengths of body, antenna and cauda are provided for a sample of each instar.