Thanks, Ed. Yes, the currant leaves with red lesions had aphids. I
thought I'd seen that before. I think they usually lose the red color
later in the season, but remain bumpy. And also - the Jonkeers Van Tet,
which I bought on your recommendation, as a good red currant that was
less susceptible to aphids, shows no signs of aphid damage at all, so
far. So thanks for the advise. I'll let you know how I like the fruit
(next year?)