Parsnip foliage turning orange/red - is it canker?

I've recently noticed that my parsnip foliage is changing colour to an orange/red. I've searched the internet but it refers to the top of the crown not the foliage that changes colour. I've had carrot root maggot so maybe this is the cause. What do you think?

Occasionally parsnips are affected by carrot root fly and the orabngy leaves sound like this might be the case.

Luckily it is usuallly easy to cut out the affected part when you harvest them, as the roots are so bog, whereras with carrots, It is very fiddly indeed.

Carrots, parsnips, parsley; same family, same pesky fly!

My experience with parsnips is the same as Yorkie's - the canker resulting from carrot fly damage is not usually severe enough to trash the whole root, although any attack isn't usually severe enough to cause much affect on the foliage in my experience.

Give them a good feed to cheer them up and keep an eye on them; if the foliage continues to redden and/or die you might have to investigate what's happening under the soil.