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Tom Vilsack
USDA expanding release of parasitic wasp to combat citrus disease
USDA expanding release of parasitic wasp to combat citrus disease

The U.S Department of Agriculture on Tuesday said it would expand efforts to breed and release a tiny parasitic wasp in an attempt to contain the spread of a disease that has killed thousands of citrus trees in Florida and now is threatening California's $2-billion citrus industry.     Huanglongbing, or citrus greening, is an incurable disease carried by the Asian citrus psyllid, a pest that has spread like wildfire across the U.S. There are full and partial quarantines in place in at least 14 states and U.S. territories.  Researchers since 2009 have been releasing the wasp, known by its scientific name Tamarixia radiata, in the U.S. The wasp is a natural enemy of the...

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