Incidence, appearance and development of potato mop-top furovirus-induced spraing in potato cultivars and the influence on yield, distribution in Denmark and detection of the virus in tubers by ELISA |
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| Authors: | S L Nielsen J P Mølgaard |
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| Institution: | (1) Research Centre Flakkebjerg, Danish Institute of Agricultural Sciences, DK-4200 Slagelse;(2) Research Centre Foulum, Danish Institute of Agricultural Sciences, P.O. Box 23, DK-8830 Tjele |
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| Abstract: | Summary 23 potato cultivars were grown in fields infested with potato mop-top virus and spraing was assessed on tubers at harvest
and after storage. Large differences in spraing susceptibility were found between cultivars. Compared with other countries,
spraing in Denmark is characterised by a high incidence at harvest, a low increase during storage and a very low proportion
of superficial spraing. Decrease in spraing during storage was recorded in two cultivars. DASELISA tests for PMTV in tubers
revealted a high reliability. Mapping of PMTV in important Danish potato growing areas showed that the virus is widespread.
Occurrence of spraing did not influence total yield or dry matter content. Soil acidity did not influence incidence of spraing
but it was more common on coarse-grained soil than on finer sandy soils. PMTV in viruliferous resting spores ofSpongospora subterranea was inactivated by heating to 90°C for 15 minutes. |
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| Keywords: | Solanum tuberosum Spongospora subterranea thermal inactivation |
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