"Pete C" wrote in
o.uk:

While I was weeding the plot this morning, I noticed sky blue marks on
broad bean leaves. On further inspection, I found the same on French
beans and peas. Some just spots, others about 5p size. It wipes off
with a wet finger. Any ideas as to what this could be?
Ta

I have no idea what this can be. BUT I would spray them with Provado
Ultimate Bug Killer. Yes I know that it is not friendly. But what else can
you do? Catch 22 situation. Beans or no beans? I hate these decisions, but
usualy spray if my plants are threatened.

Baz