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Related images: Cowpea Aphid Cowpea aphids Cowpea aphids on alfalfa stem
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Entomology Image Gallery > Cicadas and Leafhoppers > Aphids > Cowpea Aphid
Cowpea aphids
Adult cowpea aphids are black and nymphs are slate gray. The white objects are shed skins.
This image appears in the following article:
Cowpea aphid: a new pest in Iowa alfalfa? (August, 2002)