french bean problem

[pickledtink]

Bean experts. HEEELP!
My french climbers were doing fine. Whipping up the canes looking healthy. Suddenly they appear to have stopped growing and the bottom sets of leaves don't look good.
I'm wondering if it's overwatering ( possible)
Wrong mix when I did a foliar feed so leaf burn maybe. Only that would affect them all wouldn't it?
Or the dreaded Halo blight. I've never seen a picture of it so don't know what it looks like.
Any ideas anyone?

[nick the grief]

here's some info on Halo blight PT.

http://www.css.msu.edu/bic/PDF/Halo%20Blight.pdf#search='halo%20blight'

Other posibles are the may have got stressed at some point (iratic watering if you missed a day or so in really hot weather) or they may have just done there jobe & are dying off (like Toms do)