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Apple dwarf (Malus platycarpa) Apple stem pitting virus (ASPV) (? not US/CAN) Apple flat apple genus Nepovirus, Cherry rasp leaf virus (CRLV) Apple mosaic genus Ilarvirus, Apple mosaic virus (ApMV) genus Ilarvirus, Tulare apple mosaic virus (TAMV) Apple stem grooving = Apple decline of Virginia crab genus Capillovirus, Apple stem grooving virus ...
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.
Antonovka apples. Antonovka is a cultivar of vernacular selection, which began to spread from the region of Kursk in Russia during the 19th century. [4] While the fruit-bearing trees have not received a wide degree of recognition outside the former Soviet Union, many nurseries do use Antonovka rootstocks, since they impart a degree of winter-hardiness to the grafted varieties.
In southern Germany apple and pear trees have been a part of the landscape for a long time, and are difficult to protect. The decline of apple and pear trees from their landscape can be expensive to replace and could have a negative effect on tourism. In the long-run, fire blight is a very important factor of economy and society. [citation needed]
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.
The Polish apple rootstocks were designed specifically for winter hardiness. [13] "A2": Developed in Sweden for hardiness and strength. [14] Seedling: Very vigorous trees produced on a rootstock grown from seed. There is greater variability than with the vegetatively propagated rootstocks.
Malus (/ ˈ m eɪ l ə s / [3] or / ˈ m æ l ə s /) is a genus of about 32–57 species [4] of small deciduous trees or shrubs in the family Rosaceae, including the domesticated orchard apple, crab apples (sometimes known in North America as crabapples) and wild apples. The genus is native to the temperate zone of the Northern Hemisphere.
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 ]