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Little cherry disease was first identified in 1933 in the Kootenay region, British Columbia, where the economically important cherry industry was severely affected. Probably introduced to the region with ornamental cherry trees and spread by the large apple mealybug population in the area, the virus infected trees in almost all orchards. Over ...
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]
Weeping Higan Cherry trees are rather prone to problems, particularly in dry soil. A type of bacterium can cause leaf spots and twig cankers. Small, reddish spots dry and drop out. A fungus can cause reddish spots which drop out leaving shot holes. Once the holes appear the leaves may fall from the tree and the disease is worse in wet weather.
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 ...
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%.
It infects the genus Prunus including cherry (Prunus avium) and peach (P. persica) trees. [2] More specifically, CMLV infects both sweet and bitter/wild type (P. emarginata) cherry trees. [3] The most common propagation host is the Chenopodium quinoa [4] and the most common infected trees in the field are Bing and Napoleon trees. [3]
Cherry X disease also known as Cherry Buckskin disease is caused by a plant pathogenic phytoplasma.Phytoplasmas are obligate parasites of plants and insects. They are specialized bacteria, characterized by their lack of a cell wall, often transmitted through insects, and are responsible for large losses in crops, fruit trees, and ornamentals. [1]
Monilinia laxa is an ascomycete fungus that is responsible for the brown rot blossom blight disease that infects many different types of stone fruit trees, such as apricots, cherries and peaches. [2] It can also occasionally affect some pome fruits; for example, apples and pears. [ 3 ]
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