Guardian: Members of the public are being asked to spot the "six most unwanted" pests and diseases threatening UK trees, as part of a citizen science survey starting on Thursday.
Recent outbreaks of the oak processionary moth and ash dieback disease have added to the increasing number of pests and diseases that have been attacking trees in the past few years, leading to a decline in tree health and in some cases tree loss.
In order to manage the threat, Open Air Laboratories (Opal) researchers, together...