Hedge growing near roses - black spot ?

2012paddy2012

Hi a few years ago I planted a couple of rows of laurel hedging and I thought that a few climbing roses here and there in between them might look nice and colourful .... One one wall it looks lovely with roses now but the down side is a lot of my laurel hedging is continually infected from the roses by what may be black spot ... See pics... I have been using a fungal spray and it seems to help a bit I don't want to move the roses or that I just wondered if any one knew of any particular spray or treatment that might do the job a bit better... Thanks ...
Paddy ....
Ps I see some yellow leaves here and there ! Is that usual .. Dos that signify soil imbalance !?

periodictable

I'm pretty sure that the spots on your roses and on your laurel are not related. There's black spot on sycamore leaves but it doesn't come from the pathogen that causes blackspot on roses, nor is your rose infecting your laurel.
There must be at least 100,000 potential infective plant agents out there, and many will present with a similar symptom, or in humans where a lump may either be a tumor or an infection.
Have a look at these pages and you may get some ideas on how to control each disease.

http://apps.rhs.org.uk/advicesearch/Profile.aspx?PID=270

http://apps.rhs.org.uk/advicesearch/profile.aspx?pid=568