By Churchbank
Cheshire,
United Kingdom 
Can disease in leylandii be eradicated? If so how please?
4 Aug, 2010
Answers
As is the Cypress aphid, and welcome to GoY Churchbank
4 Aug, 2010
Well that rather depends on what the "disease" is - things like phytophthera are difficult, or next to impossible to treat, for instance.
4 Aug, 2010