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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 .
It had glossy, dark green leaves, brilliant fall foliage color, a uniform branching habit, and most notably, a massive spring crop of white flowers. He named his selection Bradford. And the rest ...
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.
Late leaf spot Cercospora minima. Mucor fruit rot Mucor spp. Mucor piriformis. Mycosphaerella leaf spot (ashy leaf spot and fruit spot) Mycosphaerella pyri = Mycosphaerella sentina Septoria pyricola [anamorph] Nectria twig blight (coral spot) Nectria cinnabarina Tubercularia vulgaris [anamorph] Pear scab Venturia pyrina Fusicladium pyrorum ...
The Bradford pear (Pyrus calleryana 'Bradford') is widespread as an ornamental tree in North America, where it has become invasive in regions. [39] [40] [41] It is also used as a blight-resistant rootstock for Pyrus communis fruit orchards. [38] [39] The Willow-leaved pear (Pyrus salicifolia) is grown for its silvery leaves, flowers, and its ...
The Fix: If the leaves are falling over because of root rot or the plant is root-bound, repotting it is the best solution. "Snake plants should be repotted every three or four years," says Langelo.
The reduction of chlorophyll production in leaves due to decreased sunlight in the autumn explains why some leaves turn yellow. However, the yellow color can attract aphids, so some trees turn the leaves red instead by injecting a bright pigment. [8] The loss of chlorophyll may also contribute to the abscission process. [citation needed]
Semi-deciduous or semi-evergreen is a botanical term which refers to plants that lose their foliage for a very short period, when old leaves fall off and new foliage growth is starting. This phenomenon occurs in tropical and sub-tropical woody species, for example in Dipteryx odorata . [ 1 ]