Pierce’s Disease of Grape

Vinifera grapes have become economically important crop in Arizona, as wine tourism contributed $56.2 million to the state economy in 2017. The acreage of vinifera grapes in Arizona grew from 950 to more than 1,300 acres between 2013 and 2016. In 2019, Arizona grape acreage has grown to approximately 2,000. Pierce’s disease (PD) is endemic to the Southern U.S. and is a threat to vine production in Arizona, especially in regions where winters are warm.