Garden Q&A: Can I stop viburnum shrub disease from spreading?

Whether you're a gardening beginner or expert, Irish Examiner columnist Peter Dowdall has the answer to your questions

Viburnum in bloom. File picture

QUESTION

In the past year, some Viburnum tinus shrubbery has begun to die in a corner of my garden. The disease seems to be spreading and I wonder if you can explain the cause. The shrubs were planted the best part of 20 years ago. I am anxious that it may spread further as I would not like to lose a neighbouring magnolia tree. I hope you may be able to give an educated guess.