mattster1 wrote:
Hi, i have an issue with my apple and kiwi vine both planted 4 years
ago in heavy clay soil. they are around 3 metres apart from the
nearest branch. we had a Labrador dog who used the space between them
as his toilet.

What is an 'apple and kiwi vine'? Are you talking about kiwi fruit ?

http://en.wikipedia.org/wiki/Kiwi_fruit

A liitle extra nitrogen on mature vines is probably not the cause of your
problem.

the issue we have is many of the leaves have lost their colour and the
leaves have turned yellow. both were fine in the spring but have had
this issue during the summer. you can see the green veins on the
leaves but the rest is yellow. i found small black bugs on the
underside of the kiwi which i have sprayed.
runner beans are also growing in amongst the kiwi and they are fine.
we also have a grape vine and victoria plum which are also fine. i
fed both with bonemeal in the spring which hasn't been too wet (south
west UK near Bristol)
does anyone have any ideas on what it could be?

This is only a guess but it sounds like a mineral deficiency that the kiwi
is susceptible to that the others are not.

David