Potatoe leaves curling

Any help?

Have you used hay, manure or compost that might be contaminated? Every year in the spring time people posted and asked what went wrong with their plants. And a lot of times it turned out to be the same culprit: aminopyralid.
Please read this article and many others on the same topic by David the Good aka Survival gardener. The potato in the last photo looked just like yours. Unfortunately, even if the plant survives, the tubers will be deformed too.
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Wow, Joe. I have never seen that. It's either chemical or an aggressive bug. Not good.

My first impression is that May is right.

Also consider dicamba drift from neighboring fields.

https://www.potatogrower.com/2018/03/injury-prone#


(photos of drift damage at bottom of linked article.)

I used hay. But the guy I get it from does not spray only fertilizer

My neighbors entire raised beds were made from compost using same hay. Everything there is looking good.

The act of composting, as in heating, may reverse the chemical effects.

Maybe in the future compost the hay before using the hay.

Sometimes leaf curling is due to a fungal disease and can be remedied by spraying with a fungicide like this:

https://permies.com/t/93537/toxic-Fungicide

Your leaves look beyond that to me.

I had potatoes just like that last year. They looked like all the herbicide pictures. It seemed weird to me though because I used the same mulch on other potato beds that were doing just fine. I figured maybe certain varieties were more susceptible.

Eventually, I figured out the curly leaves were an early sign of pocket gophers munching the roots. They tunnel in from far away, so you don't even realise they're there.  It seems like the symptoms can be different depending on when during the life cycle if the plant the gophers get into the bed, what type of potato, etc. After a couple months though, I was certain that the curly leaves were from gopher damage underground.

“Problem” solved. It is 100% herbicide residue. I’m assuming my compost is garbage too?

Joe Hallmark wrote:“Problem” solved. It is 100% herbicide residue. I’m assuming my compost is garbage too?

Was the residue found on the plants or in the soil?  Was it determined to be from spray drift or something that accompanied the compost and other amendments into which the tubers were planted?

It’s the hay. I was mistaken by something hay guy said to me before and assumed he only used fertilizer based on his response. Neighbors tomatoes are doing it now. So I confirmed with hay guy. He uses the worst of the worst :(

Thankfully my compost was not finished yet. No other beds of mine have I used any of the hay so at least there’s that.

Still pretty bummed out.