RHESE BEANS ARE ABOUT 45-50 DAYS OLD AND WE HAVE BEEN PICKING THEM BUT NOW THEY LOOK HORRIBLE. I DID NOT OVER FERTILIZE BUT DID ADD SOME IRON CHELATE WHEN THEY STARTED LOOKING YELLOW. ANY THOUGHTS OR OPINIONS?
GREEN BEAN PROBLEM
That looks like insect damage to me....do you have another picture that you might be able to post for a clearer diagnosis?
Can you get a close up of an individual leaf that clearly shows the damage? At first glance I would say it looks like a mildew, but it could be insects like mites or flea beetles. Can't quite tell as the photo is blurry.