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Apple scab is a common disease of plants in the rose family that is caused by the ascomycete fungus Venturia inaequalis. [1] While this disease affects several plant genera, including Sorbus, Cotoneaster, and Pyrus, it is most commonly associated with the infection of Malus trees, including species of flowering crabapple, as well as cultivated apple.
In regions of apple production where the year's weather is conducive to infection up to 70% of the pesticides applied are used to control for the effects of apple scab. [9] While the main host of economic interest are various apple cultivars the other host species are still affected by the pathogen.
Almond scab was first documented in almond orchards in the 1950s. However it did not become a major disease until sprinkler irrigation became popular in the 1980s. [9] By the early 1990s almond scab could be found throughout California almond orchards. Scab infects leaves, fruit, and twigs in almonds causing dark spots to form.
The SCAB is the smoggiest region of the U.S., and the South Coast AQMD provides hourly reports throughout the district. [4] The South Coast AQMD has jurisdiction over stationary sources of pollution, while the California Air Resources Board has jurisdiction for mobile sources of pollution, including automobiles and trucks.
Pristine apple, is one of the scab-resistant cultivars, to be developed by "PRI", hence its name "PRI"stine. By 2000, the PRI have already released a total of eighteen apple cultivars, containing the scab-resistant Vf gene derived from Malus floribunda 821. Fifty-some PRI germplasm cultivars have also been released worldwide. [2]
The inoculation of Venturia inaequalis, a fungus that causes apple scab on apple tree leaves, with C. cladosporioides led to decreased conidial production in V. inaequalis. [11] As this effect is seen both on younger and older leaves C. cladosporioides is effective in preventing and controlling infections of V. inaequalis in apple trees. [11]
“A scab is a dry crust of serum and blood that forms a protective crust over an injury or wound,” Dr. Thosani says. If you experience eczema or dandruff, excessive scratching on the scalp can ...
Apple scab: AGM RHS Award of Garden Merit: C, VitC Vitamin C mg/100g BB ... California, US Introduced 1944 Flesh is white. Tree is a heavy producer. Eating