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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] Through a presently unknown mechanism, excessive feeding ...
The disease gets its name from the black patches that grow on the trunks of infected trees. In a newly infected tree, branches become denuded and then die off. Eventually, the entire tree succumbs.
Cryphonectria parasitica is a parasitic fungus of chestnut trees. This disease came to be known as chestnut blight. Naturally found in South East Asia, accidental introductions led to invasive populations of C. parasitica in North America and Europe. In the first half of the 20th century, the fungal disease had a devastating economic and social ...
Pecan scab is the most economically significant disease of pecan trees ( Carya illinoinensis) in the southeastern United States. [1] Venturia effusa is a fungal plant pathogen that causes pecan scab. The fungus causes lesions and tissue death on pecan twigs, petioles, leaves, nuts and shucks beginning in early spring, with multiple cycles of ...
Battelle Memorial Institute (or simply Battelle) is a private nonprofit applied science and technology development company headquartered in Columbus, Ohio. The institute opened in 1929 but traces its origins to the 1923 will of Ohio industrialist Gordon Battelle which provided for its creation and his mother Annie Maude Norton Battelle who left ...
Rhizosphaera needle cast is a common fungal disease of Colorado blue spruce, which eventually kills mature trees. Once the foliage is removed, it will not regrow, even if sunlight now reaches the ...
www .davey .com. The Davey Tree Expert Company, also known as Davey Tree, is a North American employee-owned corporation. The company's main services are research driven tree services, grounds maintenance and environmental consulting services for residential, utility, commercial and environmental partners in the United States and Canada.
Arborist. An arborist, or (less commonly) arboriculturist, is a professional in the practice of arboriculture, which is the cultivation, management, and study of individual trees, shrubs, vines, and other perennial woody plants in dendrology and horticulture . Arborists generally focus on the health and safety of individual plants and trees ...