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Beech bark disease is a disease that causes mortality and defects in beech trees in the eastern United States, Canada and Europe. [ 1 ] [ 2 ] [ 3 ] In North America , the disease occurs after extensive bark invasion by Xylococculus betulae and the beech scale insect , Cryptococcus fagisuga . [ 4 ]
Beech trees make up about 10% to 15% of the state’s total forest trees and up to 50% in some areas in Washington County, according to estimates from Fern Graves, forest stewardship program ...
Beech leaf disease is a newly discovered lethal disease of beech trees believed to be caused by the nematode Litylenchus crenatae mccannii. [1] The symptoms of the disease appear as a dark green, interveinal banding pattern on the lower canopy foliage, eventually spreading throughout the tree.
Cryptococcus fagisuga, commonly known as the beech scale or woolly beech scale, is a felted scale insect in the superfamily Coccoidea that infests beech trees of the genus Fagus. It is associated with the transmission of beech bark disease [ 3 ] because the puncture holes it makes in the bark allow entry of pathogenic fungi which have been ...
Two of my favorite spring plants, almost entirely based upon their progression from bud to leaf, are beech trees and false hellebore.
Copper beech in autumn Shoot with nut cupules. Fagus sylvatica is a large tree, capable of reaching heights of up to 50 metres (160 feet) tall [4] and 3 m (10 ft) trunk diameter, though more typically 25–35 m (82–115 ft) tall and up to 1.5 m (5 ft) trunk diameter.
Neonectria faginata is a species of fungus that affects Beech trees in North America. [1] Neonectria faginata , along with Neonectria ditissima , are the cause of beech bark disease in trees that have already been affected by beech scale Cryptococcus fagisuga .
Several trees normally have marcescent leaves such as oak (Quercus), [5] beech (Fagus) and hornbeam (Carpinus), or marcescent stipules as in some but not all species of willows . [6] All oak trees may display foliage marcescence, even species that are known to fully drop leaves when the tree is mature. [7] Marcescent leaves of pin oak (Quercus ...