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No symptoms develop in naturally infected Arracacia or oca. The oca strain causes symptomless infections in experimentally inoculated potato plants. Naturally infected potato plants show calico symptoms (bright yellow leaf markings), but other viruses have always been found in such plants, in mixed infection.
As with all potato viruses, control depends on the production of high-quality seed potatoes from virus-free nuclear stock (OEPP/EPPO, 1999a). Measures of the type taken against other South American potato viruses, for example, Potato T virus (EPPO/CABI, 1996b), will, if necessary, protect against the introduction of ABV-O into other continents.
The virus has been eliminated from infected arracacha by heat and chemical therapy (Fletcher and Fletcher, 2001).
AVB-O is not known to have any direct economic importance in potato. However, according to Salazar (personal communication, 1997; quoted in Jeffries, 1998), it has recently been found infecting 10% of native cultivars in a clonally propagated genebank at the International Potato Centre, Peru. It is important, therefore, for potato breeders, and producers of certified seed potatoes, to ensure that any source material of potato or tuber-forming species of Solanum originating from infested countries is free from AVB-O.