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First line summary |
This document describes the biology of potato virus Y (PVY), and gives information about symptoms, strategies for control and prevention, and influence on yield. |
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Application |
Potato virus Y (PVY) is the most important virus disease in Denmark. For each % attacked plants, a decrease in yield of 0.5% is expected. PVY consists of a thread-like single stranded DNA-like genome enclosed in protein, and propagation occurs inside the cells of the plants. As different strains of PVY exist, information about symptoms and impact on yield for each strain is described. Since the transfer of PVY depends on aphids, A prediction/warning system, based on capture of aphids, is described in detail and the aphids are characterised as vector for the spread of virus through different risk values. |
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Argumentation |
The information in this document is based on the latest knowledge regarding Potato Virus Y (PVY). The knowledge is based on trial based experience obtained at the Danish Agricultural Advisory Service, and an interpretation of the results of national and international potato research. Every year an early warning system is established, where yellow traps are set up in the fields, in order to attract and catch aphids, with a subsequent evaluation of the risk of PVY. The system was primarily used by the farmers for estimating the time for desiccation and as guidance for selection of seed lots for winter testing of tubers for virus infestation. |
