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The leaves are compound with up to 10 pairs of leaflets, which are elliptic about 5–7 centimetres (2.0–2.8 in) long and 2–3 cm (0.79–1.18 in) wide. Its highly ornamental seeds mean it's sometimes referred to as the black pearl tree or velvet-seed tree.
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
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.
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. But over that ...
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 .
Pyrus betulifolia, known as the birchleaf pear in English and tang li in Chinese, [2] is a deciduous wild pear tree native to the leafy forests of northern and central China and Tibet. It can grow 10 meters high in optimal conditions. Formidable thorns (which are modified stems) protect its leaves from predation.
Print/export Download as PDF; Printable version; ... It causes leaf blisters on pear trees. [1] [2] References This page was last edited on 10 January 2024 ...
Printable version; In other projects Wikidata item; Appearance. move to sidebar hide. Help. Pages in category "Pear tree diseases" The following 21 pages are in this ...