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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
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.
Symptoms can overlap across causal agents, however differing signs and symptoms of certain pathogens can lead to the diagnosis of the type of leaf spot disease. Prolonged wet and humid conditions promote leaf spot disease and most pathogens are spread by wind, splashing rain or irrigation that carry the disease to other leaves. [2]
Common English names for the plant and its fruit are Indian fig opuntia, Barbary fig, cactus pear, prickly pear, and spineless cactus, among many others. [3] In Mexican Spanish, the plant is called nopal, a name that may be used in American English as culinary terms. Peninsular Spanish mostly uses higo chumbo for the fruit and chumbera for the ...
Pages in category "Pear tree diseases" The following 21 pages are in this category, out of 21 total. This list may not reflect recent changes. * List of pear diseases; C.
Opuntia engelmannii is a prickly pear common across the south-central and Southwestern United States and northern Mexico.It goes by a variety of common names, including desert prickly pear, discus prickly pear, Engelmann's prickly pear [2] in the US, and nopal, abrojo, joconostle, and vela de coyote in Mexico.
Opuntia, commonly called the prickly pear cactus, is a genus of flowering plants in the cactus family Cactaceae, many known for their flavorful fruit and showy flowers. [1] Cacti are well-adapted to aridity; however, they are still vulnerable to alterations in precipitation and temperature driven by climate change. [ 2 ]
Opuntia fragilis is a small, prostrate plant, rarely more than 10 cm (4 in) high: joints tumid, fragile, easily detached, oval, elliptical, or subglobose, 3–5 cm (1–2 in) long and nearly as thick as broad, bright green: areoles 0.6–1.3 cm (1 ⁄ 4 – 1 ⁄ 2 in) apart, with whitish wool and a few white to yellow bristles, which are much longer and more abundant on older joints; spines 1 ...