"Pete C" wrote in message
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

Up here we are in a jet aircraft training zone and spotting of leaves
is a regular occurence from excess jet fuel ejection. The spots start
off as irridescent blue on wet leaves, but after a day or so the spots
turn black. Gardeners locally have lost all their vegetables after a
particularly bad event and even when analysis has shown jet fuel
to be the culprit, the RAF have denied all knowledge.

Phil
Northern Highlands of Scotland (Area 14 training zone)