Box blight: This disease causes leaves to turn brown and fall

摘要

This disease is now widespread in the UK, having been first recognised in the mid 1990s. It affects Buxus sempervirens and its cultivars. These include B. suffruticosa, B. variegata and B. elegantissima among others. Plants can defoliate and show dieback on stems, leading to large, brown dead sections.The disease favours humid and dry weather—infections can establish within 48 hours and can peak in the autumn months. Spores can overwinter and are not affected by frost but in the summer, spores can be affected by temperatures higher than 30°C.