whats wrong with my cucumbers

[gianni]

PLEASE HELP any ideas on what i can do to save my plants< or have they had it??? please please help

[taff]

the first one looks like mildew on the bottom, probably from being damp, not sure about the second, maybe more of the same, maybe something eating it underneath, check for aphids, and wait for someone more experienced
either way, the bottom leaves usually do that after a while, and they look like quite big plants. They're still fine though so don't panic yet.

[roitelet]

Looks like mildew to me too.

[Maccabee]

Yep looks like my courgettes last year. It didn't seem to affect the crop though

[WendyC]

Could be worth checking the underside of the leaves for red spider mite if these are greenhouse cucumbers. Tiny reddish creatures that eventually suck the leaves dry. Personally I think I'd take the worst leaves off.