The only hosts that have been identified for Encarsia perplexa are Aleurocanthus woglumi and Aleurocanthus incertus, another whitefly.
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Amitus hesperidum is another citrus blackfly parasitoid that has been used alongside E. perplexa to control the pest.
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Encarsia perplexa is a tiny parasitic wasp, a parasitoid of the citrus blackfly, Aleurocanthus woglumi, which is a global pest of citrus trees.