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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]
Malus × robusta, called Siberian crab apple along with other members of its genus, is a hybrid species of flowering plant in the family Rosaceae. [1] It is the result of a cross between Malus baccata (Siberian crab apple) and Malus prunifolia (plum-leaved crab apple). [2] It is being studied for its resistance potential to fire blight. [3]
Pyrus calleryana, also known as the Callery pear or Bradford pear, is a species of pear tree native to China and Vietnam, [2] in the family Rosaceae. It is most commonly known for its cultivar 'Bradford' and its offensive odor, widely planted throughout the United States and increasingly regarded as an invasive species .
A whole row of these pungent flowering trees in bloom isn’t particularly pleasant. The Bradford pear also has a major structural flaw. “The upright branching habit makes it prone to storm ...
In 1908 he found that Callery pear trees grown from imported Chinese seeds in a test orchard in Oregon resisted the fire blight. These healthy trees produced lots of fruit.
The Callery pear, or Bradford pear, is one of those vampires. Over the years, Callery pear (Pyrus calleryana) has become one of the most widely planted ornamental trees in the US. But over that ...
For some species of pine, such as Aleppo pine (Pinus halepensis), European black pine (Pinus nigra) and lodgepole pine (Pinus contorta), the effects of fire can be antagonistic: if moderate, it helps pine cone bursting, seed dispersion and the cleaning of the underwoods; if intense, it destroys these resinous trees.
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