John Colhoun (plant Pathologist)
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John Colhoun (plant Pathologist)
John Colhoun (born 15 May 1913, Castlederg, County Tyrone, Northern Ireland – 5 January 2002, Stockport, Cheshire, England) was a British mycologist, phytopathologist, and professor of cryptogamic botany. (with a comprehensive list of Colhoun's publications) For a one-year term from 1963 to 1964 he was the president of the British Mycological Society. Life Born into a farming family, John Colhoun preferred an academic approach to agriculture. In 1930 he matriculated at Queen's University Belfast (QUB). There he graduated in 1933 with a B.Sc. in botany, in 1934 with a degree in agricultural botany with first class honours, and in 1937 with an M.Agr. in mycology and plant pathology. His M.Agr. thesis is entitled ''Biological Studies on the Apple Fruit Crop''. Supported by research assistantships at QUB and at the Ministry of Agriculture for Northern Ireland, he did research from 1934 to 1940 at Imperial College London and at QUB. The research concerned how nutrition and nitrog ...
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Castlederg
Castlederg (earlier Caslanadergy, ) is a town in County Tyrone, Northern Ireland. It lies on the River Derg and is near the border with County Donegal, Ireland. It stands in the townlands of Castlesessagh and Churchtown, in the historic barony of Omagh West and the civil parish of Urney. The village has a ruined castle and two ancient tombs known as the Druid's Altar and Todd's Den. It had a population of 2,976 people at the 2011 Census. This article contains quotations from this source, which is available under th Open Government Licence v3.0 © Crown copyright. The village hosts some of the district's key events each year, including the Derg Vintage Rally, Dergfest music festival, Red River Festival and the traditional Apple Fair. Castlederg was a traveller's stop along the ancient pilgrimage route to Station Island on Lough Derg. The town boasts ancient ruins and monastic settlements. History Early history Historically the area around the town was a site of contestatio ...
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International Society For Plant Pathology
The International Society for Plant Pathology is a global nonprofit institution dedicated to ''“promoting world-wide plant health and food security.”'' It was founded in 1968 and the first President of the society was the pioneer British plant pathologist, Ronald Karslake Starr Wood. The International Society for Plant Pathology is a member of the International Union of Biological Sciences (IUBS), the International Union of Microbiological Societies (IUMS), in liaison with the UN Food and Agriculture Organization (FAO). History The aim of its founders in 1968 was to disseminate knowledge about plant development and plant diseases and their management. The ISPP also organises the International Congress of Plant Pathology every half-decade which is sponsored by its executive committee. The constituent bodies of the ISPP include a general assembly that convenes every five years during the congress, a council, an executive committee, a secretariat and subject matter commit ...
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1913 Births
Events January * January 5 – First Balkan War: Battle of Lemnos – Greek admiral Pavlos Kountouriotis forces the Turkish fleet to retreat to its base within the Dardanelles, from which it will not venture for the rest of the war. * January 13 – Edward Carson founds the (first) Ulster Volunteer Force, by unifying several existing loyalist militias to resist home rule for Ireland. * January 23 – 1913 Ottoman coup d'état: Ismail Enver comes to power. * January – Stalin (whose first article using this name is published this month) travels to Vienna to carry out research. Until he leaves on February 16 the city is home simultaneously to him, Hitler, Trotsky and Tito alongside Berg, Freud and Jung and Ludwig and Paul Wittgenstein. February * February 1 – New York City's Grand Central Terminal, having been rebuilt, reopens as the world's largest railroad station. * February 3 – The 16th Amendment to the United S ...
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Farmers Club
The Farmers Club is a London private members' club based at Whitehall Court, founded in 1842. Members are required to have an association with farming, agriculture or food. History The club was founded in 1842 by the agricultural writer William Shaw, who invited the founder members from the newly formed Royal Agricultural Society of England, and the Smithfield Club. Shaw's letter set out that the club would be "a gathering place for farmers which could also serve as a platform, from which would go out to England news of all that was good in farming, with reports of any discussions about those things that needed to be done." The club's membership experienced periodic shifts with the changing prosperity of British farmers over the years - there were 700 members in 1876, 275 in 1892, but the club has grown in the 20th century, claiming 1,500 members in the 1920s, and just under 6,000 today. The club frequently moved premises in its first 60 years. Its inaugural meeting on 9 Decem ...
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Authors' Club
The Authors' Club is a British membership organisation established as a place where writers could meet and talk. It was founded by the novelist and critic Walter Besant in 1891. It is headquartered at the National Liberal Club. The Authors' Club was based for many years next door to its present site, on Whitehall Court, first moving into the National Liberal Club in 1966. After ten years there, in 1976 the Authors' Club joined forces with The Arts Club in Dover Street, London W1. In 2011 it moved to Blacks, a Grade 2* listed building by John Meard in Dean Street, Soho — a house that was once home to a club run by Samuel Johnson and Thomas Gainsborough — where it remained for three years. It has now returned to its old home in the National Liberal Club. The Club welcomes both men and women as members, and is open to all those "professionally engaged with literature". It was at a dinner at the Authors’ Club that Oscar Wilde denounced the censorship of his play '' Salome'' ...
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Athenaeum Club, London
The Athenaeum is a private members' club in London, founded in 1824. It is primarily a club for men and women with intellectual interests, and particularly (but not exclusively) for those who have attained some distinction in science, engineering, literature or the arts. Humphry Davy and Michael Faraday were the first chairman and secretary and 51 Nobel Laureates have been members. The clubhouse is located at 107 Pall Mall at the corner of Waterloo Place. It was designed by Decimus Burton in the Neoclassical style, and built by the company of Decimus's father, James Burton, the pre-eminent London property developer. Decimus was described by architectural scholar Guy Williams as "the designer and prime member of the Athenaeum, one of London's grandest gentlemens' sic.html"_;"title="'sic">'sic''clubs". The_clubhouse_has_a_Doric_portico.html" ;"title="sic">'sic''.html" ;"title="sic.html" ;"title="'sic">'sic''">sic.html" ;"title="'sic">'sic''clubs". The clubhouse has a Doric port ...
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Date Palm
''Phoenix dactylifera'', commonly known as date or date palm, is a flowering plant species in the palm family, Arecaceae, cultivated for its edible sweet fruit called dates. The species is widely cultivated across northern Africa, the Middle East, and South Asia, and is naturalized in many tropical and subtropical regions worldwide. ''P. dactylifera'' is the type species of genus ''Phoenix'', which contains 12–19 species of wild date palms. Date trees reach up to in height, growing singly or forming a clump with several stems from a single root system. Slow-growing, they can reach over 100 years of age when maintained properly. Date fruits (dates) are oval-cylindrical, long, and about in diameter, with colour ranging from dark brown to bright red or yellow, depending on variety. Containing 61–68 percent sugar by mass when dried, dates are very sweet and are enjoyed as desserts on their own or within confections. Dates have been cultivated in the Middle East and the ...
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Wilt Disease
A wilt disease is any number of diseases that affect the vascular system of plants. Attacks by fungi, bacteria, and nematodes can cause rapid killing of plants, large tree branches or even entire trees. Wilt diseases in woody plants tend to fall into two major categories, those that start with the branches and those that start with the roots. Those that start with the branches most often start with pathogens that feed on the leaves or bark, those that start with the roots start with wounding or direct entry by the pathogen into the roots, some are spread from one plant to another by way of root grafts. Pathogens that cause wilting diseases invade the vascular vessels and cause the xylem to fail to transport water to the foliage, thus causing wilting of stems and leaves. Wilt diseases Wilt diseases include: Bacterial wilt of cucurbits Bacterial wilt of cucurbits is cause by the bacteria ''Erwinia tracheiphila'', it affects cucumber, squash, muskmelon, pumpkin, gourds; certain ...
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Oil Palm
''Elaeis'' () is a genus of palms containing two species, called oil palms. They are used in commercial agriculture in the production of palm oil. The African oil palm ''Elaeis guineensis'' (the species name ''guineensis'' referring to its country of origin) is the principal source of palm oil. It is native to west and southwest Africa, occurring between Angola and Gambia. The American oil palm ''Elaeis oleifera'' () is native to tropical Central and South America, and is used locally for oil production. Description Mature palms are single-stemmed, and can grow well over tall. The leaves are pinnate, and reach between long. The flowers are produced in dense clusters; each individual flower is small, with three sepals and three petals. The palm fruit is reddish, about the size of a large plum, and grows in large bunches. Each fruit is made up of an oily, fleshy outer layer (the pericarp), with a single seed (the palm kernel), also rich in oil. Species The two species, '' ...
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Phoma
''Phoma'' is a genus of common coelomycetous soil fungi. It contains many plant pathogenic species. Description Spores are colorless and unicellular. The pycnidia are black and depressed in the tissues of the host. ''Phoma'' is arbitrarily limited to those species in which the spores are less than 15  µm as the larger spored forms have been placed in the genus ''Macrophoma''. The most important species include ''Phoma beta'' which is the cause of the heart rot and blight of beets, ''Phoma batata'' that produces a dry rot of sweet potato, and ''Phoma solani''. Taxonomy About 140 ''Phoma'' taxa have been defined and recognized which may be divided into two large groups: (i) plurivorous fungi, generally saprobic or weakly parasitic, mainly from temperate regions in Eurasia, but occasionally also found in other parts of the world (including areas with cool or warm climates); and (ii) specific pathogens of cultivated plants. However other estimates place the number of taxa ...
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Septoria
''Septoria'' are ascomycete pycnidia-producing fungi that cause numerous leaf spot diseases on field crops, forages and many vegetables including tomatoes which are known to contract ''Septoria musiva'' from nearby cottonwood trees, and is responsible for yield losses. The genus is widespread, and estimated to contain 1072 species. Pycnidia produce needle-like pycnidiospores. ''Septoria apiicola'' is the cause of late blight of celery. It is characterized by the production of conidia within pycnidia. The symptoms include chlorotic spots that turn brown and necrotic. ''Septoria apiicola'' can survive on seeds. Several species of passion flower are infected by several species of ''Septoria'', and a fungus, which has been going by the name ''Septoria passiflorae'' but which is probably an undescribed species, has been used to control the invasive ''Passiflora tarminiana ''Passiflora tarminiana'' (or banana passionfruit) is a species of passionfruit. The yellow fruits are edi ...
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