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Asian citrus psyllid nymphs – Diaphorina citri

Asian citrus psyllid nymphs - Diaphorina citri

Citrus greening disease is spread by the invasive Asian citrus psyllid (Diaphorina citri). Nymphs (shown here) measure less than 2 millimeters in length in their fifth instar. (Photo by USGS Bee Inventory and Monitoring Lab, via Flickr)

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