My new research project at UCL will research how citizen scientists might contribute data on and respond to trees diseases. Another scenario where citizens might act as an early-warning system. Great post – thanks!
It causes wilting, black-brown discolouration and loss of the leaves. Lesions or necrotic spots appear on the bark and enlarge to form perennial cankers. There is wilting of shoots and branches, causing crown dieback. Ultimately it can lead to tree death, with mortality more common in saplings.
This disease is currently spreading across Europe. In the UK it was identified in a shipment of ash trees from the Netherlands to a nursery in Buckinghamshire in February 2012, the trees were destroyed. Then in June it was found in young ash trees planted in a car park in Leicestershire, the origins of this are still under investigation.
So far the disease has not been located in the UK in the wild, but plant nursery and tree-care sectors are being urged to check the health…
View original post 109 more words