Abstract
Potato virus Y (PVY) has a wide host range and causes losses in solanaceous crops such as potato, tobacco and tomato. Chenopodium album L. is a documented host for PVY and naturally infected plants have been reported in Europe. Natural infections of PVY have not been reported from C. album in North America to date. C. album grows in abundance in and around potato fields in New Brunswick, Canada. To investigate whether this species can be a natural host for PVY and, moreover, be a potential inoculum source for this virus, we investigated its ability to be infected naturally with PVY in the wild and under controlled inoculations. PVY was not detected in 164 C. album leaf samples collected from potato fields in the potato growing area in New Brunswick in 2010 and 2011 growing seasons. We inoculated field-grown C. album plants with plant sap from PVY infected plants and Myzus persicae Sulzer fed on infected plants. PVY was detected from 16% of the sap inoculated plants 4 weeks after inoculations but not from the aphid inoculated plants. Altogether, these results indicate that C. album does not play a significant role as a host for PVY in this region.
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