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Arizona cypress is widely cultivated as an ornamental tree. Unlike Monterey cypress, it has proved highly resistant to cypress canker, caused by the fungus Seiridium cardinale, and growth is reliable where this disease is prevalent. The cultivar 'Pyramidalis' [16] has gained the Royal Horticultural Society's Award of Garden Merit (confirmed ...
Cypress canker is a disease affecting Cupressus species, caused by one of several species of fungus in the genus Seiridium. Infection causes die-back of twigs and branches in susceptible cypress trees, [ 1 ] with rapidly increasing amounts of damage and the death of the tree.
Hesperocyparis glabra, known as the Arizona smooth bark cypress or smooth Arizona cypress, is a conifer native to the American Southwest, with a range stretching over the canyons and slopes in a somewhat wide vicinity around Sedona, Arizona.
Seiridium cardinale is important to gardeners and foresters as they cause the devastating Cypress canker disease on Cupressus, Thuja, and related conifers in Northern Europe, America, Australia, [4] and New Zealand. [5] [6] Seiridium cardinale is from California and was introduced to Europe around the 1930s, probably from infected nursery stock ...
It is the primary cause of Cypress canker, a fungal disease that affects various species of trees in the genus Cupressus, including Cupressus sempervirens, the Provence cypress. This disease leads to the decline of infected trees and has led to the destruction of millions in central Italy in particular. [1] [2] It causes branch and trunk cankers.
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Members of Hesperocyparis were and still are placed in Cupressus by many authorities, but phylogenetic evidence supports a different affinity. A 2021 molecular study found Hesperocyparis to be the sister group to the genus Callitropsis (containing only the Nootka cypress), with this clade being sister to the Asian genus Xanthocyparis, containing only the Vietnamese golden cypress.
In these areas, the canker-resistant Arizona cypress is much more successful. In northern areas where heavy snows occur, this plant is also susceptible to broken branches and uprooting in wet, heavy snow. The tree has also been introduced in Kenya on parts of Mount Kenya. The sap can cause skin irritation in susceptible individuals. [19]
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