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The disease was first described in 1821 in Pennsylvania, but has spread across North America. While it was one of the most destructive diseases of plum and cherry trees in the late 19th century, today it is relatively well controlled in many cultivated areas and seen primarily in poorly managed orchards, or where strongly established, including ...
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.
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 ...
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%.
Prunus necrotic ringspot virus (PNRSV) is a plant pathogenic virus causing ring spot diseases affecting species of the genus Prunus, as well as other species such as rose (Rosa spp.) and hops (Humulus lupulus).
Plum pox, also known as sharka, is the most devastating viral disease of stone fruit from the genus Prunus. The disease is caused by the plum pox virus (PPV), and the different strains may infect a variety of stone fruit species including peaches , apricots , plums , nectarine , almonds , and sweet and tart cherries .
Viral diseases; Bare twig and unfruitfulness genus Nepovirus, Strawberry latent ringspot virus. genus Tobamovirus, Cucumber green mottle mosaic virus. Line pattern & Necrotic ring spot genus Ilarvirus, Prunus necrotic ringspot virus (PNRSV) Peach mosaic genus Trichovirus, Cherry mottle leaf virus (CMLV) Plum pox (= Sharka)
Historically, the disease is believed to have originated in Austria, but is now a minor presence for all peach trees typically east of the Rocky Mountains. As a minor disease, peach scab is most dangerous when the scabs develop—allowing brown rot to infect the plant, which is a far more devastating disease.