They look like grains of black sand inside a prescription vial, but each speck is a wasp that is lethal to the offspring of the Asian citrus psyllid, an aphid-size bug that spreads the bacteria that cause Huanglongbing, or citrus greening disease. If California’s $1.8 billion citrus industry is to buy enough time to stave off the disease, which has decimated citrus crops in Florida, Mexico and Brazil, those vials may as well be hourglasses.

See article at: http://www.sfgate.com/news/article/Scientists-using-wasps-to-protect-citrus-crops-6456275.php

Also see full information on Huanglongbing, citrus greening disease at:  http://cisr.ucr.edu/citrus_greening.html

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