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Specific replant disease (also known as sick soil syndrome) is a malady that manifests itself when susceptible plants such as apples, pears, plums, cherries and roses are placed into soil previously occupied by a related species. The exact causes are not known, but in the first year the new plants will grow poorly.
Blue mold Penicillium spp. ... Apple scar skin = apple dapple, apple sabi-ka, apple bumpy fruit ... Genetically predisposed rootstock Fruit cracking Genetic Fruit russet
For commercial purposes, including botanical evaluation, apple cultivars are propagated by clonal grafting onto rootstocks. Apple trees grown without rootstocks tend to be larger and much slower to fruit after planting. Rootstocks are used to control the speed of growth and the size of the resulting tree, allowing for easier harvesting.
Penicillium expansum produces the mycotoxin patulin, a neurotoxin that can enter the food supply via apples and apple products such as juice and cider. [19] Considering the size of the apple product industry and the large number of people that may come into contact with infected fruits, control of P. expansum is vitally important. [20]
Burrknot on apple tree A2 rootstock, after plantation, side view. Burrknot is a tree disorder caused by the formation of adventitious root primordia. Although previously classified as disease, is now classified as a disorder, as it is no longer believed to be pathogenic. [1] It first looks like a smooth orange bulge growing from the stem or a ...
Apple mosaic virus (ApMV) is a plant pathogenic virus of the family Bromoviridae. It is named after its symptoms that were first present on apples. [ 1 ] ApMV is a positive sense RNA based virus. [ 1 ]