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Anaham disease

German name for the grapevine disease Pierce Disease; see there.

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.

Pierce Disease - Blattsymptome und Glassy Winged Sharpshooter (Zikade)

At the end of the 1990s, the disease became more prevalent again. US Vice President Al Gore approved emergency aid totalling 36 million dollars at the end of 2000 and declared a state of emergency (agricultural) for California. In 2014, PD caused the Californian wine industry a loss of US$ 104 million. The disease is not yet present in Europe. The cooler climate probably prevents it from spreading northwards. However, if climate change should cause it to do so (which is highly likely), it is mainly Mediterranean regions that are at...

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