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Black rot, leaf spot and canker Botryosphaeria obtusa Sphaeropsis malorum [anamorph] Black spot (of Japanese pear) Alternaria alternata. Blister canker Helminthosporium papulosum. Blister disease Coniothecium chomatosporum: Blue mold rot Penicillium spp. Penicillium expansum. Botrytis spur and blossom blight Botrytis cinerea
Erwinia pyrifoliae is a Gram-negative bacterium and a phytopathogen of Asian pear trees (Pyrus pyrifolia), causing necrotic disease. [1] Its type strain is Ep16/96 T (=CFBP 4172 T =DSM 12163 T . [ 2 ]
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.
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 .
Like many rusts, G. sabinae requires two different hosts to complete its life cycle from year to year. Juniper is the winter host and pear is the summer host. Spores (called aeciospores) are produced from the fungal lantern-shaped growths which protrude from the blisters on the underside of the pear leaf which become airborne and infect junipers.
In the European pear, it is the cause of the disease known as late leaf spot. [1] The geographic distribution includes India , South America , and the south-eastern United States . [ 2 ]
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.
Pyrus pyrifolia is a species of pear tree native to southern China and northern Indochina that has been introduced to Korea, Japan and other parts of the world. [1] The tree's edible fruit is known by many names, including Asian pear, [2] Persian pear, Japanese pear, [2] Chinese pear, [2] [3] Korean pear, [4] [5] [6] Taiwanese pear, apple pear, [7] zodiac pear, three-halves pear, papple ...