Asian Longhorn Beetle 04/06/2019

Asian Longhorn Beetle Anoplophora glabripennis This beetle native origin is found in parts of Asia. It has caused extensive damage to trees in North America, through accidental introduction in 1990. Since 2000 parts of mainland Europe have been effected, Italy is...

Emerald Ash Borer 14/04/2019

Emerald Ash Borer Agrilus planipennis This is not yet present in the UK but has had devastating effects in North America and Russia. What is it? it is a small insect that bores into the tree. Cause – The insects larvae is what causes the devastating damage, as...

Acute Oak Decline 09/03/2019

Acute Oak Decline This is a bacterial infection The disease was believed to be first established in Britain around 30 years ago. The disease effects mainly English and Sessile Oak The disease causes tissue decay. Symptoms include vertical weeping fissures which seep...

Massaria Disease in Plane Trees 14-11-2018

Massaria (S. platani) This disease was noted in London 2009 by people who manage trees. London Plane trees were displaying large lesions, and branches would unexpectedly drop. The cause of this condition is assumed to be spores from the fungal pathogen Splanchnonema...

Disease Watch September 2018 Inonotus hispidus

Inonotus hispidus This disease can be found on mainly living trees, very rarely dead trees. Its common hosts are the following: (Broad leaved trees) especially apple, walnut, plane, and ash. Description – this is an annual fungal bracket generally up to 35 cm...