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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]
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]
Rust, Kern's pear Gymnosporangium kernianum. Rust, Pacific Coast pear Gymnosporangium libocedri. Rust, pear trellis (European pear rust) Gymnosporangium fuscum. Rust, Rocky Mountain pear Gymnosporangium nelsonii. Side rot Phialophora malorum. Silver leaf Chondrostereum purpureum. Sooty blotch Gloeodes pomigena. Thread blight (Hypochnus leaf blight)
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 ...
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According to Campanis, the story began on the West Coast at the turn of the 20th century when fruit trees were dying from a disease called fire blight. Frank Reiber, a plant scientist, searched ...