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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.
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.
Blight is a rapid and complete chlorosis, browning, then death of plant tissues such as leaves, branches, twigs, or floral organs. [1] Accordingly, many diseases that primarily exhibit this symptom are called blights. Several notable examples are: [citation needed]
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Olive quick decline syndrome (OQDS) (in Italian: Complesso del Disseccamento Rapido dell'Olivo, CDRO or CoDiRo) is a wasting disease of olive trees which causes dieback of the leaves, twigs and branches so that the trees no longer produce crops of olives.
Butternut canker is a lethal disease of butternut trees, and has no cure.. A plant canker is a small area of dead tissue, which grows slowly, often over years. Some cankers are of only minor consequence, but others are ultimately lethal and therefore can have major economic implications for agriculture and horticulture.
Leaves of young cypress trees are spreading and awl-shaped, and are typically small, scale-like formations that tightly adhere to older branches. They are usually aromatic , with glandular pits on the outer surface, and cover the stem in opposite pairs, giving the branchlet a four-sided appearance.