Is this blight on my potatoes?

[Andyt880]

New to growing potatoes here.
We noticed a few plants with black stalks and black on the leaves tonight.
Is this blight?
They are British Queens and are ready to dig. They were sprayed with Infneto 48hrs before these photos were taken.
Spoke to the spray supplier over the phone and he thought it sounded more like black leg. We have never heard of black leg in potatoes.

 

[ridger]

Blackleg I think, picture isn't showing enough leaves

 

[deleted user 837354]

Maybe a touch of blight on the leaves here and there but nothing serious. Shouldn't make any odds now if they are being dug up. Flail off or remove foliage anyway.

If it's blackleg the spuds go all wilty long before the tubers are ready and the plants will be stunted, you will see a few individuals get it amongst other healthy plants. I've never actually seen it in a field scale crop.

 

[JLLM]

Looks like a bit of wind damage as well, black slimy stems is probably blackleg.

 

[Andyt880]

If it is blackleg will it effect the tubers? It seems to only be on the queens. The main crop are Maris Piper and they are all in the same plot but so far they look healthy

 

[Bogweevil]

New to growing potatoes here.
We noticed a few plants with black stalks and black on the leaves tonight.
Is this blight?
They are British Queens and are ready to dig. They were sprayed with Infneto 48hrs before these photos were taken.
Spoke to the spray supplier over the phone and he thought it sounded more like black leg. We have never heard of black leg in potatoes.

I am with the blackleggers, it is sporadic and associated with infected seed tubers, which fits with the queen's being affected and Piper not.

There are signs of senescence, as you might expect in a second early in August, but not blight imho.

Hope there are is a bumper crop down below...

 

[Andyt880]

I am with the blackleggers, it is sporadic and associated with infected seed tubers, which fits with the queen's being affected and Piper not.

There are signs of senescence, as you might expect in a second early in August, but not blight imho.

Hope there are is a bumper crop down below...

The queens seed wouldn’t have been certified seed so it’s quite possible that’s the problem. When you say senescence does that just mean the tops are dying off?
The crop seems to be good so far, only started to dig a few at the end of 2 drills to get the farm gate sales up and going.

 

[deleted user 837354]

Yes, the crop is 'going to sleep' or entering senescence naturally. You will see this in some varieties of potato but not all. The leaves go a bit yellowy and the stems may keel over. The haulm has done it's job and dies back. The tubers underneath are absolutely fine.

 

[jon9000]

Black leg... no dought about it

 

[richard hammond]

Black leg... no dought about it

+1 definitely!