Submitted to: Phytopathology
Publication Type: Abstract Only
Publication Acceptance Date: 3/1/2008
Publication Date: 7/1/2008
Citation: Groves, R., Charkowski, A., Bussan, A., Gray, S.M. 2008. Impact of Potato virus Y on long term storage of potato. Phytopathology. 98:S62. Interpretive Summary:
Technical Abstract: In recent years, Potato virus Y has reemerged as a serious disease problem in many potato production areas in the northern United States and eastern Canada. In Wisconsin, two widely grown cultivars, Russet Norkotah and Silverton, express mild or no symptoms when infected with PVY. The lack of symptoms often associated with these cultivars and novel, recombinant strains of this virus prevents accurate field identification and rouging of infected plants resulting in higher levels of virus inoculum and greater disease pressure. We have initiated field studies to investigate the efficiency of tuber infection in plants inoculated with different strains of PVY at different plant developmental stages, and to document in storage quality losses associated with each PVY strain. This area of investigation seems extremely important as there have been no studies to quantify or define the consequences of long-term storage of tubers infected with PVY. To date, replicated field experiments conducted in 2007 have resulted in some overall differences in tuber yield and quality estimates among the varieties tested. Differences in percent solids, specific gravity, marketable tuber weight, marketable tuber number, and non-marketable tubers were detected in selected cultivars. This project has already generated new information regarding the relative responses of selected potato varieties to infection by the novel, recombinant PVY strains in Wisconsin while also providing practical guidance in documenting the impact of virus infection on long-term tuber storage.