Almanac Pests
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Almanac Pests
Plant pests of current importance (potential or existing risk for the European region)
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Standing Committee on Plant Health, report OCT 2011

Slovenia informed the Committee of their national emergency measures for Hop stunt viroid (HSV). Observation of first symptoms dates back to 2007.

EUROPEAN COMMISSION
HEALTH AND CONSUMERS DIRECTORATE-GENERAL Brussels, SANCO G (2011) 1418728

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Plant Disease - First report of Hop stunt viroid infecting hop in Europe

Plant Disease - First report of Hop stunt viroid infecting hop in Europe | Almanac Pests | Scoop.it

Diseased stunted hop plants occure along the row (S. Radisek, 2011)


Hop stunt viroid (HSVd) infection has been observed in several hop fields (Humulus lupulus) with the varieties Celeia, Bobek and Aurora, in Slovenia in last years, but it has been only recently confirmed by two laboratories.

The symptoms included stunting, leaf curl, small cone formation and dry root rot. In the first year of finding the disease, the incidence varied from 1-30% and increased rapidly (by up to 10%) each subsequent year, predominantly along plant rows.

Using molecular methods labs finnaly identified HSVd, which belongs to the Hostuviroid genus, Pospiviroidae family and has been previously reported in hops in Japan, South Korea, North America and China.

This is the first report of the detection of HSVd on hops in Europe. Strict phytosanitary measures have been taken to prevent further spread and to eradicate HSVd infections.

Radisek et al. (2012) First report of Hop stunt viroid infecting hop in Slovenia.- Plant Disease 
http://dx.doi.org/10.1094/PDIS-08-11-0640-PDN

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