citrus greening disease (1)

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.

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