Can the UK keep out tree diseases? – a view from Professor Nicola Spence
by Angus, 16 April, 2019, 1 comments
Recently, I met up with Nicola Spence, the UK's Chief Plant Health Officer: her observations took me on a hair-raising tour of the battlements that keep British trees safe from foreign invaders. To give an idea of the importance of plant health she pointed out that in the 1960s and 1970s Dutch Elm Disease from Europe killed between 10 and 20 million trees; the recent Ash Dieback (Hymenoscyphus fraxineus), which also came from continental Europe, is in the process of wiping out about 80% of the UK's ash trees. Consequently her department is very vigilant to stop any further invasions of pathogens or insects that could attack our trees. For example Defra and the Forestry Commission have successfully dealt with localised outbreaks of Sweet chestnut blight and in Kent there was a recent infestation of trees by the Asian Longhorn Beetle which meant cutting down and incinerating all trees within a 100 metre radius.
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