Relationship between aphid occurrence and spread of potato virus Y(o) (PVY(o)) in field experiments in southern Sweden
1989
Sigvald, R. (Swedish University of Agricultural Sciences, Uppsala (Sweden). Research Information Centre)
Field experiments were carried out in potato fields in 1975-1979 to study the natural spread of potato virus Y(o) from diseased potato plants (virus sources) to progeny tubers of adjacent healthy potato plants. The occurrence of alate aphids was studied by using yellow water traps (YWT) and the aphid population on the potato foliage was estimated by counting aphids on 100 randomly chosen leaves. There was a good correlation between the number of alate aphids trapped in YWT and spread of potato virus Y(o). Rhopalosiphum padi were probably the main vector, but many other aphid species could also have contributed, e.g. Aphis fabae, A. nasturtii, A. frangulae, Phorodon humili and Hyperomyzus lactucae. There were only weak association between numbers of apterae on potato leaves and the spread of PVY(o)
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