By Jmn
Glos,
United Kingdom 
I have noticed a lot of leylandii hedges have turned brown this year and unforutnately some of mine too - any ideas what is causing this?
18 Jul, 2011
possibly the cause is down to the conifer aphid, check for sooty mould aprox three inches in from the tips, if so then spray with ultimate bugclear.
19 Jul, 2011