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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)
This wild pear and Pyrus caucasica (syn. P. communis subsp. caucasica) are thought to be the ancestors of the cultivated European pear (Pyrus communis subsp. communis). Both the wild pears are interfertile with domesticated pears. It is sometimes difficult to distinguish Pyrus pyraster from a common pear. Pyrus pyraster can reach an age of 100 ...
Bosc Pear, from The Pears of New York (1921) by Ulysses Prentiss Hedrick [1] The Beurré Bosc or Bosc is a cultivar of the European pear (Pyrus communis), originally from France or Belgium. Also known as the Kaiser, it is grown in Europe, Australia, British Columbia and Ontario, Canada, and the U.S. states of California, Washington, and Oregon.
Cancer symptoms are changes in the body caused by the presence of cancer. They are usually caused by the effect of a cancer on the part of the body where it is growing, although the disease can cause more general symptoms such as weight loss or tiredness. There are more than 100 different types of cancer with a wide range of signs and symptoms ...
Fire blight, also written fireblight, is a contagious disease affecting apples, pears, and some other members of the family Rosaceae. It is a serious concern to apple and pear producers. Under optimal conditions, it can destroy an entire orchard in a single growing season.
It occurs less commonly in pears. The disease was probably first reported in Germany where it was known as Stippen. [1] It was also known as "Baldwin spot" and "blotchy cork" in North America. The name "bitter pit" was first used by Cobb in Australia in 1895. [2] The disease has been shown as non-pathological and is now known as a disorder.
Pyrus communis, the common pear, is a species of pear native to central and eastern Europe, and western Asia. [ 3 ] It is one of the most important fruits of temperate regions, being the species from which most orchard pear cultivars grown in Europe , North America , and Australia have been developed.
Gymnosporangium sabinae is a species of rust fungus in the subdivision Pucciniomycotina.Known as pear rust, European pear rust, or pear trellis rust, it is a heteroecious plant pathogen with Juniperus sabina (savin juniper) as the main primary host and Pyrus communis (common pear) as the main secondary host.