The dangerous vine disease (PD for short) was first detected in Southern California in 1880, when 20,000 hectares of vines were destroyed in five years. It is also known as California Vine Disease, Mysterious Disease or Anaham Disease (because it is spread as far as Anaham in California). At this time, the plant pathologist Newton B. Pierce (1856-1916) moved to California. It was named after him because of his contribution to its research. From 1933 to 1940, its greatest distribution was in California's Central Valley, from where it spread throughout the south of the USA, Mexico and Central America. In the USA, the entire southern belt from California in the west to Texas and Florida on the east coast is affected.
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