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If symptoms are present it is recommended that the trees are felled, and the plant matter is destroyed by burning. There are no known clones of willow tree that are resistant or immune to the disease. Breeding for resistance is not a control method that is employed due to the limited incidence and impact of watermark disease. [8]
Slime flux, also known as bacterial slime or bacterial wetwood, is a bacterial disease of certain trees, primarily elm, cottonwood, poplar, boxelder, ash, aspen, fruitless mulberry and oak. A wound to the bark, caused by pruning, insects, poor branch angles or natural cracks and splits, causes sap to ooze from the wound. Bacteria may infect ...
Various cultivars of Salix matsudana (Chinese willow) are now often included within Salix babylonica, treated more broadly, including: 'Pendula' is one of the best weeping trees, with a silvery shine, hardier, and more disease resistant. 'Tortuosa' is an upright tree with twisted and contorted branches, marketed as corkscrew willow.
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Entoleuca mammata is a species of fungus in the genus Entoleuca.It is responsible for the plant disease hypoxylon canker in hardwood trees such as quaking aspen (Populus tremuloides) [1] and other aspens and poplars, [2] Salix myrsinifolia [1] and other willow species, [1] [2] rowan (Sorbus aucuparia), [1] Sitka alder (Alnus viridis), [2] birch (Betula spp.), [2] apple (Malus spp.), [2] oak ...
Salix × fragilis is cultivated as a fast-growing ornamental tree. The cultivar 'Russelliana' (syn. S. × fragilis var. russelliana) is by far the most common clone of crack willow in Great Britain and Ireland, very easily propagated by cuttings. It is a vigorous tree commonly reaching 20–25 m (66–82 ft) tall, with leaves up to 15 cm long.
Hypoxylon canker of shade trees is an ascomycete fungal disease. [7] [8] The fungal pathogen must take advantage of wounds in the host tree or unhealthy tree tissue to infect and colonize the host, as normal, robust trees are not very susceptible to infection. [7]
Oak wilt is a devastating exotic disease, killing some trees rapidly in a single season. [7] Oak wilt is an important disease in urban areas where trees are highly valued. . The disease reduces property values because of the loss of trees and is economically costly to the property owner since they or the local government must pay for tree remo