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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
The black Worcester pear (also known as Parkinson's Warden and the Worcester Black Pear) is a cultivar of the European pear (Pyrus communis), it may have come to the British Isles via the Romans, but also has been used in heraldry and around the city of Worcester. The dark fruit is mainly used for cooking or culinary uses.
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.
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 .
Over 3000 cultivars of the pear are known. [1] The following is a list of the more common and important cultivars, with the year and place of origin (where documented) and an indication of whether the pears are for cooking, eating, canning, drying or making perry.
Pyrus elaeagrifolia, the oleaster-leaved pear, is a species of wild pear plant in the genus Pyrus , the specific name referring to the similarity of its foliage to that of Elaeagnus angustifolia - the so-called 'wild olive' or oleaster. It is native to Albania, Bulgaria, Greece, Romania, Turkey, and Crimea. [2]
[7] [8] [2] Many of both black and white inhabitants of the areas in which the prickly pear was prominent came to rely on the plant as a useful asset to be eaten, prepared, sold or used as fodder and, consequently, there were groups of people who had a very positive attitude towards the plant, with one farmer of the time going so far as to say ...
Chondrostereum purpureum is a fungal plant pathogen which causes Silver leaf disease of trees. It attacks most species of the rose family Rosaceae, particularly the genus Prunus. The disease is progressive and often fatal. The common name is taken from the progressive silvering of leaves on affected branches.