Scientists now think the disease is spread by fungus on dead leaves which lie on the ground all winter, then produce spores between July and September which are carried by the wind.
Which makes it deeply unsettling to walk through rustling leaves into a patch of 40 or so dead and dying trunks, most upright, some toppled; the diseased remains of what was only three years ago the biggest stand of healthy ash in a forest of beech and oak.Like their British counterparts when it showed up here, they hadn’t known anything about Chalara fraxinea, and it took years of laboratory work to identify the fungus, which researchers believe probably originated in Asia.When it arrived in Europe some nations tried to stop it. “They tried burning infected trees in Norway but it was very expensive and had no effect,” Mrs Olrik said.They have learnt that once these shoots appear, the tree is doomed.When the dying ashes were first noticed in Denmark in 2003 frost was suspected as the culprit.
Dating app danmark Gribskov
Anders Grube, 53, believes 250 acres of trees have been lost in the 10,600 acre forest he manages a couple of hours drive south of Gribskov.He calculates that the coming of the fungus has cost roughly 10 million Danish krone (£1.1 million), profit lost to the private school which owns the estate.Bark splits, leaves blacken, tiny mushroom-like fungus grows on twigs, and treetops die, even if there are signs of life lower down the trunk. About 90 per cent of Denmark’s ash trees are thought to have the fungus and nearly all the rest are expected to succumb.Farms always have one growing at the front because, according to folklore, they protect against fire.