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Stephen Wilhelm
Stephen Wilhelm (19 April 1919, Imperial, California – 15 July 2002, Walnut Creek, California) was a professor of plant pathology, known for his success in controlling ''Verticillium ''Verticillium'' is a genus of fungi in the division Ascomycota, and are an anamorphic form of the family Plectosphaerellaceae. The genus used to include diverse groups comprising saprobes and parasites of higher plants, insects, nematodes, mo ...'' wilt. His research on plant hybridization and soil fumigation contributed to revolutionary developments in the strawberry and raspberry industries. Biography Wilhelm matriculated in 1941 at the University of California, Los Angeles and graduated there with bachelor's degree in 1944. During WW II, he served in the U.S. Army. He received his Ph.D. in 1948 from the University of California, Berkeley (UC Berkeley). In 1949 he was an assistant professor of plant pathology and an assistant plant pathologist at the Experiment Station, Berkeley. Wilhelm r ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Imperial, California
Imperial is a city in Imperial County, California, north of El Centro. As of the 2010 census, the city had a population of 14,758. It is part of the El Centro metropolitan area. In 2016, Imperial was the fourth fastest-growing city in the state, gaining 4.1 percent more residents from January 1, 2015, to January 1, 2016. It compares to Imperial County's growth of 1.3 percent and Brawley's growth of 1.2 percent. History Imperial was created by the Imperial Land Company and was named by George Chaffey. Imperial's first post office opened in 1901. Imperial incorporated in 1904. The first mayor of Imperial was Allison Peck. The town-site of Imperial was plotted in 1902 for home and commercial businesses. Its first buildings included a printing press, drug store, grocery store, brick building, and church. The city can also boast of having the first school in the valley and the first Chamber of Commerce. The City of Imperial was incorporated July 12, 1904 thus being the fi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Walnut Creek, California
Walnut Creek is a city in Contra Costa County, California, United States, located in the East Bay region of the San Francisco Bay Area, about east of the city of Oakland. With a total population of 70,127 per the 2020 census, Walnut Creek serves as a vibrant hub for its neighboring cities because of its location at the junction of the highways from Sacramento and San Jose (I-680) and San Francisco/Oakland ( SR-24), and its accessibility by BART. Its active downtown neighborhood features hundred-year-old buildings and extensive high-end retail establishments. The city shares its borders with Clayton, Lafayette, Alamo, Pleasant Hill, and Concord. History There are three bands of Bay Miwok Native Americans associated with the area of Walnut Creek (the stream for which the city is named):Forester, 2006.Milliken, 1995 the '' Saclan'', whose territory extended through the hills east of present-day cities of Oakland, Rossmoor, Lafayette, Moraga and Walnut Creek; the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Verticillium
''Verticillium'' is a genus of fungi in the division Ascomycota, and are an anamorphic form of the family Plectosphaerellaceae. The genus used to include diverse groups comprising saprobes and parasites of higher plants, insects, nematodes, mollusc eggs, and other fungi, thus the genus used to have a wide-ranging group of taxa characterised by simple but ill-defined characters. The genus, currently thought to contain 51 species, may be broadly divided into three ecologically based groups - mycopathogens, entomopathogens, and plant pathogens and related saprotrophs. However, the genus has undergone recent revision into which most entomopathogenic and mycopathogenic isolates fall into a new group called ''Lecanicillium''. At least five species are known to cause a wilt disease in plants called verticillium wilt: ''V. dahliae'', ''V. longisporum'', ''V. albo-atrum'', ''V. nubilum'', and ''V. tricorpus''. A sixth species, ''V. theobromae'', causes fruit or crown rot, a non-wiliti ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
University Of California, Los Angeles
The University of California, Los Angeles (UCLA) is a public university, public Land-grant university, land-grant research university in Los Angeles, California. UCLA's academic roots were established in 1881 as a Normal school, teachers college then known as the southern branch of the California State Normal School (now San Jose State University, San José State University). This school was absorbed with the official founding of UCLA as the Southern Branch of the University of California in 1919, making it the second-oldest of the 10-campus University of California system (after UC Berkeley). UCLA offers 337 undergraduate and graduate degree programs in a wide range of disciplines, enrolling about 31,600 undergraduate and 14,300 graduate and professional students. UCLA received 174,914 undergraduate applications for Fall 2022, including transfers, making the school the most applied-to Higher education in the United States, university in the United States. The university is or ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
University Of California, Berkeley
The University of California, Berkeley (UC Berkeley, Berkeley, Cal, or California) is a public land-grant research university in Berkeley, California. Established in 1868 as the University of California, it is the state's first land-grant university and the founding campus of the University of California system. Its fourteen colleges and schools offer over 350 degree programs and enroll some 31,800 undergraduate and 13,200 graduate students. Berkeley ranks among the world's top universities. A founding member of the Association of American Universities, Berkeley hosts many leading research institutes dedicated to science, engineering, and mathematics. The university founded and maintains close relationships with three national laboratories at Berkeley, Livermore and Los Alamos, and has played a prominent role in many scientific advances, from the Manhattan Project and the discovery of 16 chemical elements to breakthroughs in computer science and genomics. Berkeley i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chloropicrin
Chloropicrin, also known as PS and nitrochloroform, is a chemical compound currently used as a broad-spectrum antimicrobial, fungicide, herbicide, insecticide, and nematicide. It was used as a poison gas in World War I. Its chemical structural formula is Cl3CNO2. Synthesis Chloropicrin was discovered in 1848 by Scottish chemist John Stenhouse. He prepared it by the reaction of sodium hypochlorite with picric acid: : HOC6H2(NO2)3 + 11 NaOCl → 3 Cl3CNO2 + 3 Na2CO3 + 3 NaOH + 2 NaCl Because of the precursor used, Stenhouse named the compound chloropicrin, although the two compounds are structurally dissimilar. Today, chloropicrin is manufactured by the reaction of nitromethane with sodium hypochlorite: : H3CNO2 + 3 NaOCl → Cl3CNO2 + 3 NaOH or by the reaction of chloroform with nitric acid: : CHCl3 + HNO3 → CCl3NO2 + H2O Properties Chloropicrin's chemical formula is CCl3NO2 and its molecular weight is 164.38 grams/mole. Pure chloropicrin is a colorless liquid, with a boiling po ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rhizosphere
The rhizosphere is the narrow region of soil or substrate that is directly influenced by root secretions and associated soil microorganisms known as the root microbiome. Soil pores in the rhizosphere can contain many bacteria and other microorganisms that feed on sloughed-off plant cells, termed ''rhizodeposition'', and the proteins and sugars released by roots, termed root exudates. This symbiosis leads to more complex interactions, influencing plant growth and competition for resources. Much of the nutrient cycling and disease suppression by antibiotics required by plants, occurs immediately adjacent to roots due to root exudates and metabolic products of symbiotic and pathogenic communities of microorganisms. The rhizosphere also provides space to produce allelochemicals to control neighbours and relatives. The ''rhizoplane'' refers to the root surface including its associated soil particles which closely interact with each other. The plant-soil feedback loop and other ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Driscoll's
Driscoll's is a California-based seller of fresh strawberries and other berries. It is a fourth-generation family business that has been in the Reiter and Driscoll families since the late 1800s. In 2017, it controlled roughly one-third of the $6 billion U.S. berry market. Headquartered in Watsonville, California, Driscoll's develops proprietary breeds of berries and then licenses them exclusively through approved growers. History Early 1900s, foundation and the Banner Strawberry The origin of Driscoll's dates back to the late 1800s. In 1849, a butcher from Alsace settled in California and eventually farmed near Watsonville. The butcher's son, J.E. "Ed" Reiter and Reiter's brother-in-law, R.F. "Dick" Driscoll, began growing strawberries in the region. It was the beginning of what has been referred to as "the California strawberry gold rush." During a meeting between Thomas Loftus, Driscoll, and Reiter, the three formed a partnership to protect and promote strawberries in the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1919 Births
Events January * January 1 ** The Czechoslovak Legions occupy much of the self-proclaimed "free city" of Pressburg (now Bratislava), enforcing its incorporation into the new republic of Czechoslovakia. ** HMY ''Iolaire'' sinks off the coast of the Hebrides; 201 people, mostly servicemen returning home to Lewis and Harris, are killed. * January 2– 22 – Russian Civil War: The Red Army's Caspian-Caucasian Front begins the Northern Caucasus Operation against the White Army, but fails to make progress. * January 3 – The Faisal–Weizmann Agreement is signed by Emir Faisal (representing the Arab Kingdom of Hejaz) and Zionist leader Chaim Weizmann, for Arab–Jewish cooperation in the development of a Jewish homeland in Palestine, and an Arab nation in a large part of the Middle East. * January 5 – In Germany: ** Spartacist uprising in Berlin: The Marxist Spartacus League, with the newly formed Communist Party of Germany and the Independent Social D ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
American Phytopathologists
American(s) may refer to: * American, something of, from, or related to the United States of America, commonly known as the "United States" or "America" ** Americans, citizens and nationals of the United States of America ** American ancestry, people who self-identify their ancestry as "American" ** American English, the set of varieties of the English language native to the United States ** Native Americans in the United States, indigenous peoples of the United States * American, something of, from, or related to the Americas, also known as "America" ** Indigenous peoples of the Americas * American (word), for analysis and history of the meanings in various contexts Organizations * American Airlines, U.S.-based airline headquartered in Fort Worth, Texas * American Athletic Conference, an American college athletic conference * American Recordings (record label), a record label previously known as Def American * American University, in Washington, D.C. Sports teams Soccer * ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
University Of California, Los Angeles Alumni
A university () is an institution of higher (or tertiary) education and research which awards academic degrees in several academic disciplines. ''University'' is derived from the Latin phrase ''universitas magistrorum et scholarium'', which roughly means "community of teachers and scholars". Universities typically offer both undergraduate and postgraduate programs. The first universities in Europe were established by Catholic Church monks. The University of Bologna (), Italy, which was founded in 1088, is the first university in the sense of: *being a high degree-awarding institute. *using the word ''universitas'' (which was coined at its foundation). *having independence from the ecclesiastic schools and issuing secular as well as non-secular degrees (with teaching conducted by both clergy and non-clergy): grammar, rhetoric, logic, theology, canon law, notarial law.Hunt Janin: "The university in medieval life, 1179–1499", McFarland, 2008, , p. 55f.de Ridder-Symoens, Hil ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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