There is an outbreak that’s killing California’s citrus trees. Earlier this month, that state’s orange growers expanded a quarantine zone to cover more than 1,000 square miles of infected land in four counties.
The infection is being caused by citrus greening, a disease brought to the U.S. from the Far East by an insect called a psyllid.
But now one researcher at the University of Arizona is working to cut off the disease at its knees — before it can spread it to the ever-valuable citrus crop here in Arizona.
The Show spoke more about it with Judy Brown, a professor in the School of Plant Sciences at UA.
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