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Asian citrus psyllid color morphs

Asian citrus psyllid (Diaphorina citri) is found in three morphological types with different colored abdomens: blue, gray, and yellow. When harboring the bacteria that causes citrus greening disease, the insect increases its level of the protein hemocyanin, which results in a blue-colored belly. (Photo credit: Michelle Cilia, USDA ARS)

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