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Chondrostereum purpureum is a fungal plant pathogen which causes Silver leaf disease of trees. It attacks most species of the rose family Rosaceae, particularly the genus Prunus. The disease is progressive and often fatal. The common name is taken from the progressive silvering of leaves on affected branches.
S. purpurea fruit grow on deciduous trees in warm tropical climates. They begin to develop following tiny red flowers, before any leaves appear on the tree. S. purpurea fruit grows along thick, knobby branches in clusters or alone. They are about 2 and a half to 5 centimeters in diameter and are slightly elongated.
Included in this genus are multiple species of trees and shrubs, such as: Dibotryon morbosum infects are Prunus serotina (wild cherry trees), Prunus persica (peach trees), Prunus domestica (plum trees), and Prunus cerasus (sour cherry trees). [3] The main symptom of Dibotryon morbosum is its “knot-like” gall structure. These knots can vary ...
Plum pox = Sharka: genus Potyvirus, Plum pox virus (PPV) Prunus stem pitting genus Nepovirus, Tomato ringspot virus (ToRSV) Purple mosaic GTP Rosette and decline genus Ilarvirus, Prunus necrotic ringspot virus (PNRSV) + genus Ilarvirus, Prune dwarf virus (PDV) Rosette mosaic Peach rosette mosaic virus: Seedling chlorosis GTP
Shot hole disease is a major concern of the stone fruit industry. It is estimated that 80% of the California almond crop may be infested with shot hole disease, resulting in a potential yield loss of 50-75%. [3] In the 1930s, it was found that applications of Bordeaux mixture reduces shot hole disease on peaches from 80% to 9%.
The following is a list of diseases of sweetgum (Liquidambar spp.). Bacterial diseases. Bacterial diseases; Bacterial canker Bacterium (unidentified)
The severity of the disease is very variable from year to year. In 1945 there was a serious outbreak in southern Pennsylvania. Trees began to defoliate early in the spring and eventually 25,000 trees died by the end of the growing season. This was 10 percent of Pennsylvania's cherry tree acreage at the time. [22]
Prunus × cistena (purple leaf sand cherry), a hybrid of Prunus cerasifera and Prunus pumila, the sand cherry, also won the Award of Garden Merit. [16] [17] [18] These purple-foliage forms (often called 'purple-leaf plum'), also have dark purple fruit, which make an attractive, intensely coloured jam. They can have white or pink flowers.
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