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Nectria Coccinea
''Nectria coccinea'' is a fungal plant pathogen. The variant ''Nectria coccinea'' var. ''faginata'' causes beech bark disease, and can infect the tree via the feeding holes made by the beech scale insect ''Cryptococcus fagisuga ''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 disea ...''. References External links Fungal tree pathogens and diseases coccinea {{fungus-tree-disease-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fungus
A fungus (plural, : fungi or funguses) is any member of the group of Eukaryote, eukaryotic organisms that includes microorganisms such as yeasts and Mold (fungus), molds, as well as the more familiar mushrooms. These organisms are classified as a Kingdom (biology), kingdom, separately from the other eukaryotic kingdoms, which by one traditional classification include Plantae, Animalia, Protozoa, and Chromista. A characteristic that places fungi in a different kingdom from plants, bacteria, and some protists is chitin in their cell walls. Fungi, like animals, are heterotrophs; they acquire their food by absorbing dissolved molecules, typically by secreting digestive enzymes into their environment. Fungi do not photosynthesize. Growth is their means of motility, mobility, except for spores (a few of which are flagellated), which may travel through the air or water. Fungi are the principal decomposers in ecological systems. These and other differences place fungi in a single gro ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Beech Bark Disease
Beech bark disease is a disease that causes mortality and defects in beech trees in the eastern United States, Canada and Europe.Houston, David R., and James T. O'Brien. "Beech Bark Disease." Forest Insect and Disease Leaflet 75(1998) 1-7. 17 Mar 2008 . Tainter, Frank H., and Fred A. Baker . Principles of Forest Pathology. New York, NY: John Wiley & Sons, Inc., 1996.Sinclair, Wayne A., and Howard H. Lyon. Diseases of Trees and Shrubs. 2nd ed. Ithaca, NY: Cornell University Press, 2005. In North America, the disease occurs after extensive bark invasion by '' Xylococculus betulae'' and the beech scale insect, ''Cryptococcus fagisuga''. Through a presently unknown mechanism, excessive feeding by this insect causes two different fungi (''Neonectria faginata'' (previously ''Nectria coccinea var. faginata'') and '' Neonectria ditissima'' (previously ''Nectria galligena'')) to produce annual cankers on the bark of the tree. The continuous formation of lesions around the tree eventually ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cryptococcus Fagisuga
''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 because the puncture holes it makes in the bark allow entry of pathogenic fungi which have been identified as '' Nectria coccinea var. faginata'' and sometimes ''Nectria galligena''. History and distribution Cryptococcus fagisuga aka Beech bark disease has been recorded as affecting common beech trees, ''Fagus sylvatica'', in Europe since before 1849. Until 1914 it was thought that the beech scale insect itself was responsible for the disease. Subsequently it was discovered that a fungus, then identified as ''Neonectria ditissima'', was in fact killing the trees infested by the scale. Around 1890 the scale insect was accidentally introduced into Nova Scotia. By 1932, the scale and its associated ''Neonectria'' fungus had spread to many ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fungal Tree Pathogens And Diseases
A fungus ( : fungi or funguses) is any member of the group of eukaryotic organisms that includes microorganisms such as yeasts and molds, as well as the more familiar mushrooms. These organisms are classified as a kingdom, separately from the other eukaryotic kingdoms, which by one traditional classification include Plantae, Animalia, Protozoa, and Chromista. A characteristic that places fungi in a different kingdom from plants, bacteria, and some protists is chitin in their cell walls. Fungi, like animals, are heterotrophs; they acquire their food by absorbing dissolved molecules, typically by secreting digestive enzymes into their environment. Fungi do not photosynthesize. Growth is their means of mobility, except for spores (a few of which are flagellated), which may travel through the air or water. Fungi are the principal decomposers in ecological systems. These and other differences place fungi in a single group of related organisms, named the ''Eumycota'' (''true f ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
