Potato Problems - Brown Spots

Hi there,

I was looking for some advice - I have brown spots on my charlotte potato leaves.

I have used a blight test on the leaves and it has come back negative.

My next guess is capsid bug attack but there are not many holes.

There are other varieties in the ground next to the charlottes, but are not showing any brown spots.

Please see an attached photo of one of the leaves.

Any advice appreciated,

Jamie

Nope - no holes as yet?  But the spots have only really shown up over the last day or two.

And only on the Charlottes?  I wonder if this variety is more susceptible to capsid?