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List Of Persian Walnut Diseases ...
This article is a list of diseases of Persian Walnuts (''Juglans regia''). Bacterial diseases Fungal diseases Nematodes, parasitic Viral diseases Miscellaneous diseases and disorders References Common Names of Diseases, The American Phytopathological Society {{Reflist +diseases Persian walnut Persian walnut ''Juglans regia'', the Persian walnut, English walnut, Carpathian walnut, Madeira walnut, or especially in Great Britain, common walnut, is an Old World walnut tree species native to the region stretching from the Balkans eastward to the Himala ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Persian Walnut
''Juglans regia'', the Persian walnut, English walnut, Carpathian walnut, Madeira walnut, or especially in Great Britain, common walnut, is an Old World walnut tree species native to the region stretching from the Balkans eastward to the Himalayas and southwest China. It is widely cultivated across Europe. It is the origin of cultivated varieties which produce the edible walnut, consumed around the world. China is the major commercial producer of walnuts. Description ''Juglans regia'' is a large deciduous tree, attaining heights of , and a trunk up to 2 m (6 ft) in diameter, commonly with a short trunk and broad crown. The bark is smooth, olive-brown when young and silvery-grey on older branches, and features scattered broad fissures with a rougher texture. Like all walnuts, the pith of the twigs contains air spaces; this chambered pith is brownish in color. The leaves are alternately arranged, 25–40 cm (10 to 16 in) long, odd-pinnate with 5–9 leaflets, pair ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Phytophthora Cactorum
''Phytophthora cactorum'' is a fungal-like plant pathogen belonging to the Oomycota phylum. It is the causal agent of root rot on rhododendron and many other species, as well as leather rot of strawberries. . Hosts, symptoms, and diagnosis ''Phytophthora cactorum'' has an extremely wide host range, and can infect over 200 species or 160 genera of trees, ornamentals, and fruit crops.Rivard, Cary. "''Phytophthora Cactorum''." ''Phytophthora Cactorum''. North Carolina State University, May 2007. Web. In general, ''P. cactorum'' is capable of infecting both young and old plants, and causes root rots and crown rots of the many genera it infects. Although the symptoms this pathogen produces varies between the types of organisms it infects, in general disease occurs during periods that are both wet and warm. Furthermore, most infections are caused by zoospores entering the plant through wounds. On older trees, ''P. cactorum'' causes the formation of sap exuding dark colored cankers on t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nepovirus
''Nepovirus'' is a genus of viruses in the order ''Picornavirales'', in the family ''Secoviridae'', in the subfamily ''Comovirinae''. Plants serve as natural hosts. There are 40 species in this genus. Nepoviruses, unlike the other two genera (''Comovirus'' and ''Fabavirus'') in the subfamily ''Comovirinae'', are transmitted by nematodes. Taxonomy The genus contains the following species: *'' Aeonium ringspot virus'' *'' Apricot latent ringspot virus'' *'' Arabis mosaic virus'' *'' Arracacha virus A'' *'' Artichoke Aegean ringspot virus'' *'' Artichoke Italian latent virus'' *'' Artichoke yellow ringspot virus'' *'' Beet ringspot virus'' *'' Blackcurrant reversion virus'' *'' Blueberry latent spherical virus'' *'' Blueberry leaf mottle virus'' *'' Cassava American latent virus'' *'' Cassava green mottle virus'' *'' Cherry leaf roll virus'' *'' Chicory yellow mottle virus'' *'' Cocoa necrosis virus'' *'' Crimson clover latent virus'' *'' Cycas necrotic stunt virus'' *'' Grapevin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Meloidogyne
Root-knot nematodes are plant-parasitic nematodes from the genus ''Meloidogyne''. They exist in soil in areas with hot climates or short winters. About 2000 plants worldwide are susceptible to infection by root-knot nematodes and they cause approximately 5% of global crop loss. Root-knot nematode larvae infect plant roots, causing the development of root-knot galls that drain the plant's photosynthate and nutrients. Infection of young plants may be lethal, while infection of mature plants causes decreased yield. Economic impact Root-knot nematodes (''Meloidogyne'' spp.) are one of the three most economically damaging genera of plant-parasitic nematodes on horticultural and field crops. Root-knot nematodes are distributed worldwide, and are obligate parasites of the roots of thousands of plant species, including monocotyledonous and dicotyledonous, herbaceous and woody plants. The genus includes more than 90 species, with some species having several races. Four ''Meloidogyne'' spe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pratylenchus Vulnus
''Pratylenchus vulnus'' (also known by the common names Walnut meadow nematode and Walnut root-lesion nematode) is a species of plant pathogenic nematode best known for infecting Persian walnut. It is also known to infest potatoes, apricots, peaches and nectarines, holiday cacti, grape A grape is a fruit, botanically a berry, of the deciduous woody vines of the flowering plant genus ''Vitis''. Grapes are a non- climacteric type of fruit, generally occurring in clusters. The cultivation of grapes began perhaps 8,000 years ago, ... and citruses. References External links Nemaplex, University of California - ''Pratylenchus vulnus'' vulnus Plant pathogenic nematodes Grape pest nematodes {{plant-disease-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mesocriconema Xenoplax
''Mesocriconema xenoplax'' is a species of plant parasitic nematodes. Nematodes of this particular species are collectively called ring nematodes. Hosts and symptoms It has a wide host range, infecting many woody plants, and it is known to infect all species of the genus ''Prunus'', which includes peach, almond, apricot, cherry, and plum. It also infects various other fruit trees, and grapes, in particular. There have been studies that have shown large concentrations of ring nematodes in peppermint, as well. Symptoms can include, but are not limited to: root-pruning, decreased nutrient uptake, vascular damage, possible death of shoots and limbs, and stunted plant growth. With the reduced nutrient uptake, some cases have shown that the change in ratio if carbon:nitrogen can make plants infected by ring nematodes more susceptible to bacterial canker cause by ''Pseudomonas syringae''(Lownsberry, et al. 1977). Anatomy and morphology Ring nematodes are easily distinguished by di ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Paratylenchus
''Paratylenchus'' is a genus of nematodes (round worms). Many of the species in this genus are plant pathogens Plant pathology (also phytopathology) is the scientific study of diseases in plants caused by pathogens (infectious organisms) and environmental conditions (physiological factors). Organisms that cause infectious disease include fungi, oomyc .... References Tylenchida Secernentea genera {{Secernentea-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Phytophthora Parasitica
''Phytophthora nicotianae'' or black shank is an oomycete belonging to the order Peronosprales and family Peronosporaceae. Hosts and symptoms ''Phytophthora nicotianae'' has a broad host range comprising 255 genera from 90 families. Hosts include tobacco, onion, tomato, ornamentals, cotton, pepper, and citrus plants. This pathogen can cause root rot, crown rot, fruit rot, leaf infection, and stem infection. Root rot symptoms are observed on tobacco, poinsettia, tomato, pineapple, watermelon, and as well as African violet. Fruit rots occur on tomato, papaya, and eggplant. Onion shows a leaf and stem infection. In tobacco Black Shank affects the roots and basal stem area, but all parts of the plant can become infected. Damping off symptoms can be observed in young seedlings. The first above ground symptom that will be observed is the wilting of plants, which leads to stunting. Roots will be blackened and decayed. In final stages of the disease the stem begins to turn black, hence ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Phytophthora Nicotianae
''Phytophthora nicotianae'' or black shank is an oomycete belonging to the order Peronosprales and family Peronosporaceae. Hosts and symptoms ''Phytophthora nicotianae'' has a broad host range comprising 255 genera from 90 families. Hosts include tobacco, onion, tomato, ornamentals, cotton, pepper, and citrus plants. This pathogen can cause root rot, crown rot, fruit rot, leaf infection, and stem infection. Root rot symptoms are observed on tobacco, poinsettia, tomato, pineapple, watermelon, and as well as African violet. Fruit rots occur on tomato, papaya, and eggplant. Onion shows a leaf and stem infection. In tobacco Black Shank affects the roots and basal stem area, but all parts of the plant can become infected. Damping off symptoms can be observed in young seedlings. The first above ground symptom that will be observed is the wilting of plants, which leads to stunting. Roots will be blackened and decayed. In final stages of the disease the stem begins to turn black, hence ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Phytophthora Megasperma
''Phytophthora megasperma'' is a species of water mould in the family Peronosporaceae. It is well known as a plant pathogen with many hosts. It often causes a plant disease called root rot.''Phytophthora megasperma''. Plantwise Knowledge Bank. Taxonomy This is a poorly defined species which is generally called a . Its name applies to water moulds of many forms, functions, and host preferences, many of which are actually different species which have not yet been separated and described.Wilcox, W. F. and S. M. Mircetich. (1987)[...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Phytophthora Drechsleri
''Phytophthora drechsleri'' is a plant pathogen with many hosts. Affected plants See: * List of potato diseases * List of maize diseases * List of almond diseases * List of apricot diseases * List of beet diseases * List of caneberries diseases * List of cassava diseases * List of tomato diseases * List of sunflower diseases * List of safflower diseases * List of poinsettia diseases * List of pigeonpea diseases * List of peach and nectarine diseases * List of Persian walnut diseases * List of chickpea diseases This is a list of diseases of chickpeas (''Cicer arietinum'') Nematodes, parasitic Viral diseases Phytoplasmal diseases {, class="wikitable" style="clear" ! colspan=2, Phytoplasmal diseases , - , Phyllody , , Phytoplasma Phytoplas ... References External linksIndex Fungorum [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Phytophthora Cryptogea
''Phytophthora cryptogea'' is a species of Oomycete, water mould in the family Pythiaceae. It is a plant pathology, plant pathogen that infects several species of cultivated plants, including over 40 species of cultivated flowers.Olson, H. A., et al. (2011)Phylogenetic history of ''Phytophthora cryptogea'' and ''P. drechsleri'' isolates from floriculture crops in North Carolina greenhouses.''Phytopathology'' 101(11) 1373-84. It was first described as the cause of tomato foot rot in tomatoes Host Range and Symptoms This species is reported to be pathogenic on Petunia × atkinsiana, grandiflora petunia (''Petunia'' × ''atkinsiana''). It causes root rot, shoot rot and shanking in tulips. It also infects blue daze (''Evolvulus glomeratus''), dusty miller (''Jacobaea maritima''), Barberton daisy (''Gerbera jamesonii''), and garden verbena (Verbena × hybrida, ''Verbena'' × ''hybrida''). Like its relative ''Phytophtora cambivora'', it can cause ink disease of Castanea sativa, chestn ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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