Yellow raspberry leaves

[womble]

My Glen Ample (I think, some sort of Glen) have yellow leaves (green veins) on last years fruiting canes.
The new canes this year are lovely and green.

I sort of remember this happened last year and it fruited enough, but I got a feeling the fruits were smaller than usual.

Is it a virus, or missing some nutrient?

They are on quite poor soil, although I try to get some stuff on now and again. I put some chicken pellets and some comfrey liquid feed on a week or two ago, but it doesn't seem to have helped.
I seem to remember trying all sorts of feeds last year, but nothing worked.

If the new canes were all yellow, I could understand a virus....... maybe this is normal?

[chris]

I had a few yellowing leaves, which I cut off assumed they'd been done and dusted due to lack of nutrients. I mulched them with a *load* of compost in the spring, no signs of yellowing yet.. My chickens poo all around them too, not sure if that's helping them either, but the chickens have only been around since October last year.

[chris]

Oh yes, I noticed it on all my currants too. They're all east-facing. I wonder if it's lack of sunlight?

[purplekat]

Sounds like a magnesium deficiency as it's on the older leaves.

Check this out (go to the bottom)
www.which.co.uk/documents/.../raspberry-cane-diseases-153695.pdf

[womble]

Excellent link, thanks.
Couldn't get yours to work, so if anyone else needs it. Here it is.
http://www.which.co.uk/documents/pdf...ses-153695.pdf

Seems like magnesium could be the culprit. Where do you buy epsom salts from then?

[mdjlucan]

from a chemist

[purplekat]

Garden centres normally stock it too with the plant food and chemicals

[womble]

Cheers, Boots had it, apparently it's used for constipation. Who knew.

[mdjlucan]

let me no how you get on