Cucumber problem - identification help appreciated

[gardendancer]

Hi there.

I've got some cucumber plants that have been growing very well.
But yesterday something appeared on the leaves of a couple of the plants.
They are indoors at night, but go outside when it gets above 10 degrees

They have been getting plenty of water, from the bottom


I just really wanted to know if it is environmental stress, or a disease ( meaning I should get rid of the affected plants asap)

Thank you in advance

[Kristen]

Did the leaves get wet?

[WendyC]

As Kristen hinted looks like scorch from the sun shining on water droplets on the leaves.

[gardendancer]

The leaves have gotten wet maybe once or twice.

[gardendancer]

Thanks for the identification thinking about it - the leave might have gotten wet outside, when I watered some of the plants around and the sun has been strong here.
I shall take more care in future, am just relieved I don't have to throw them all out.

[Kristen]

Cucumbers take offence to all sorts of things, I'm afraid.

if I fail to buy F1 All Female Flower seed dirt cheap (their RRP is more than £1 a seed) I buy plants as I reckon on 50% failure rate at least through stem rot and just plain Bloody Mindedness of the plants.

Mine were a picture of health until a couple of days ago. Nothing has change, so clearly the only issue is that they have The Hump about something ...