But before the arrival of the sawfly the trees were already struggling as a result of the ash dieback disease. How does ash dieback develop? Just as Dutch elm disease all but eliminated elm trees ...

Some species are more suitable for pollarding, such as ash, elm, or mulberry trees, meanwhile poplar or willows have weaker wood that's likely to branch off uncontrollably. It's also important to ...

Ash trees are also a very prevalent tree in urban canopies. Many were planted after Dutch Elm disease wiped out millions of elm trees in the mid-20th century. Emerald ash borer affects all the ...