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American brown rot ... Apple scar skin = apple dapple, apple sabi-ka, apple bumpy fruit ... Genetically predisposed rootstock Fruit cracking Genetic Fruit russet
The adults of Eriosoma lanigerum are small to medium-sized aphids, [4] up to 2mm long, and have an elliptical shape, are reddish brown to purple in colour but the colour is normally hidden by the white cotton-like secretion from the specialised glands in the aphid's abdomen which gives it the common name of woolly apple aphid.
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.
Related: The Best Way To Keep Apples From Turning Brown. For more Southern Living news, ... Indonesia search resumes after flash flood and landslide leaves 17 dead and 9 missing.
Apple trees are susceptible to many diseases, and because pruning involves leaving open wounds from branch cuts, it's best to do so when the trees are dormant, says Ferguson. Waiting until winter ...
Apple trees may naturally have a rounded to erect crown with a dense canopy of leaves. [6] The bark of the trunk is dark gray or gray-brown, but young branches are reddish or dark-brown with a smooth texture. [1] [7] Young twigs are covered in fine downy hairs; they become hairless when older. [7]
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.
On the apple tree, the infections occur on leaves, fruit and young twigs. [4] The brightly colored spots produced on the leaves make it easy to identify. Small, yellow-orange spots appear on the upper surfaces of the leaves, anytime from April to June. [5] These spots gradually enlarge and turn orange or red and may show concentric rings of color.