Curling pea leaves

[ameno]

Any ideas what might cause pea leaves to curl? All of my newly planted batch, put out about 3 weeks ago, are affected.

It looks like the same sort of curling that weedkiller contamination causes, and they are growing in a bed I used manure on, but I'm almost certain that it's not that, because
-Although they are curling, they are still growing fairly strongly. One of them is even flowering already.
-The person I got the manure from assured me that it was from organic pasture, and judging by the number of weeds that were in the field, and the number of weed seeds in the manure, I can but believe him.
-Most important of all, I have quite a lot of other stuff growing in soil manured with the same manure, including beetroot, multiple different brassicas, and a grape vine, and all are growing fine without any signs of distortion. And brassicas and vines, especially, are meant to be very susceptible to damage from weedkiller contamination, so if there were any at all you would think they would show it.

There don't seem to be aphids in the leaves, either, so I'm rather out of ideas.
I suppose that since the vigour seems little if at all affected it's probably nothing I really need to worry about, but I'd still like to know what's causing it.

[Mr Bones]

Any chance of a photo

[ameno]

https://i.imgur.com/Rcb5Dl9.jpg
https://i.imgur.com/oAXzT5u.jpg

It's not a severe case, but the curling is noticeable, especially compared to my previous crop of the same pea variety.

Actually, I took another look at the other plants while I was there, and I think the grape vine has some minor leaf cupping on its newest leaves, as well (so minor that I didn't notice it until I was actively looking for it), so I suspect it may actually be a minor case of weedkiller contamination.
The field the horses were grazed in clearly hadn't had any herbicides used on it, but maybe some bought-in feed was contaminated? I shan't be getting any more manure from there, at any rate.

It must be a very mild contamination, though, because only these peas and possibly the grape are affected (they are in the same bed, and I think I used more manure on on that one than on the others, although it's hard to judge), and even then only pretty mildly affected. The brassicas, beetroot, leeks, raspberries, and copious weeds growing in beds given the same manure all show not even the slightest sign of contamination (the leeks and some of the brassicas I even intentionally put some chunks of manure in the bottom of the planting holes, for extra water retention).

Well, with a contamination this mild, with any luck the soil bacteria will have dealt with it all by next spring.

[bario1]

It doesn't look like aminopyralid contamination to me, or if it is it's very minor. I don't think brassicas suffer from it, so that's probably not much of an indicator?

[ameno]

It doesn't look like aminopyralid contamination to me, or if it is it's very minor. I don't think brassicas suffer from it, so that's probably not much of an indicator?

I think it may be a very mild case, especially as the grape seems to be cupping a little, too. It doesn't really seem to be affecting vigour, though, so I guess it's not much to worry about.
It is odd that it's not affecting anything else, though. Raspberries, especially, are supposed to be very prone. But if it's not herbicide contamination, what else could it be?

Maybe I should take some soil samples and put some tomato cuttings in them to test it.

[veggiechicken]

It looks quite normal to me and, if it did look ever so slightly different, I'd put it down to the weather.

[Aberdeenplotter]

as a past UK pea growing Champion, I think VC is spot on.

[ameno]

It looks quite normal to me and, if it did look ever so slightly different, I'd put it down to the weather.

They're definitely noticeably curlier than the first lot I grew (which weren't curly at all; the leaves were perfectly flat at all stages).
But if you say it's probably nothing then you're probably right.

[ameno]

The pea leaves seem to be recovering now, and the plants are still growing strong.
Still to soon for results from my soil test: the pea seeds have all germinated, but they are still less than an inch tall, so too early to tell if there are any issues.

[Peteyd]

It looks quite normal to me and, if it did look ever so slightly different, I'd put it down to the weather.

I would be inclined to agree. They look exactly like my peas and i'm rather happy with them.