Figure 9. Seasonal distribution of plum pox virus strain D in chronically infected apricots in France. In this cultivar of apricot, ELISA is reliably detected along the branch from apex to basal region early in the season. As the season progresses toward summer, the virus detection is most reliable in the basal one-half to one-third of the branch.
(Diagram courtesy of J.B. Quiot, INRA, France).
© Copyright 2000 by The American Phytopathological Society