Search results
Results from the WOW.Com Content Network
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]
In 1908, Bradford Callery pear or Pyrus calleryana "Bradford" was brought to the U.S. to breed fire-blight out of the normal fruiting trees from Korea and China.
We brought the callery pear to the United States in the early 1900s because we were trying to breed a resistance to a disease called fire blight into our native pears, according to Professor Jason ...
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)
The Bradford pear tree is a medium-sized tree that reaches a height of up to 60 feet with bark that is a muted, grayish brown which splits into scales with age. ... Because of fire blight, a ...
A well-known member of this genus is the species E. amylovora, which causes fire blight on apples, pears, and other Rosaceae crops; E. tracheiphila, though, causes bacterial wilt of cucurbits. Other familiar species, such as E. carotovora (another major cause of plant diseases), are more distantly related to the fire blight bacterium, and have ...
Frank Reiber, a plant scientist, searched for fire blight–resistant, fruit-tree seeds. In 1908 he found that Callery pear trees grown from imported Chinese seeds in a test orchard in Oregon ...
Fire blight of pome fruits, caused by the bacterium Erwinia amylovora (Burrill) Winslow et al., is the most severe disease of pear and also is found in apple and raspberry, among others. Bacterial leaf blight of rice , caused by the bacterium Xanthomonas oryzae (Uyeda & Ishiyama) Dowson.