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Celery Mosaic Virus
Celery mosaic virus (CeMV) is a Plant virus, plant pathogenic virus in the genus'' Potyvirus '' and the virus family '' Potyviridae ''. In California, mosaic diseases of celery (''Apium graveolens'') were reported as early as 1922. After some time, it became clear that there were at least two different viruses causing mosaic diseases with similar symptoms in celery. These two viruses were first differentiated by host range. One of the viruses had a wide host range and was named ''Southern celery mosaic''. The second had a host range restricted to the family Umbelliferae (Apiaceae) and was called ''Western celery mosaic''. Continued research showed that the ''Southern mosaic virus'' was actually an isolate of ''Cucumber mosaic virus'' and '' Western celery mosaic'' eventually became known simply as ''Celery mosaic virus''. Symptoms and host range Symptoms of celery mosaic virus include a distinct mottled pattern on the leaves, distorted leaf growth with exaggerated rosette for ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ontario Sessional Papers, 1917, No
Ontario ( ; ) is one of the thirteen provinces and territories of Canada.Ontario is located in the geographic Eastern Canada, eastern half of Canada, but it has historically and politically been considered to be part of Central Canada. Located in Central Canada, it is Canada's Population of Canada by province and territory, most populous province, with 38.3 percent of the country's population, and is the second-largest province by total area (after Quebec). Ontario is Canada's List of Canadian provinces and territories by area, fourth-largest jurisdiction in total area when the territories of the Northwest Territories and Nunavut are included. It is home to the nation's capital city, Ottawa, and the nation's list of the largest municipalities in Canada by population, most populous city, Toronto, which is Ontario's provincial capital. Ontario is bordered by the province of Manitoba to the west, Hudson Bay and James Bay to the north, and Quebec to the east and northeast, and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Parsnip
The parsnip (''Pastinaca sativa'') is a root vegetable closely related to carrot and parsley, all belonging to the flowering plant family Apiaceae. It is a biennial plant usually grown as an annual. Its long taproot has cream-colored skin and flesh, and, left in the ground to mature, it becomes sweeter in flavor after winter frosts. In its first growing season, the plant has a rosette of pinnate, mid-green leaves. If unharvested, in its second growing season it produces a flowering stem topped by an umbel of small yellow flowers, later producing pale brown, flat, winged seeds. By this time, the stem has become woody and the tap root inedible. The parsnip is native to Eurasia; it has been used as a vegetable since antiquity and was cultivated by the Romans, although some confusion exists between parsnips and carrots in the literature of the time. It was used as a sweetener before the arrival of cane sugar in Europe. Parsnips are usually cooked, but can also be eaten raw. T ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Viral Plant Pathogens And Diseases
Viral means "relating to viruses" (small infectious agents). Viral may also refer to: Viral behavior, or virality Memetic behavior likened that of a virus, for example: * Viral marketing, the use of existing social networks to spread a marketing message * Viral phenomenon, relating to contagion theory or the "virality" of network culture, such as a meme * Viral video, a video that quickly attains a high popularity Titled works * ''Viral'' (2016 American film), a 2016 American science fiction horror drama * ''Viral'' (2016 Hindi film), an Indian Bollywood film based on social media * ''Viral'' (web series), a 2014 Brazilian comedy web series * '' V/H/S: Viral'', an American anthology horror film * '' Viral: The Search for the Origin of COVID-19'', a book by Alina Chand and Matt Ridley See also * ''Virals'', a novel series by Kathy Reichs * Virulence Virulence is a pathogen's or microorganism's ability to cause damage to a host. In most, especially in animal system ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mulch
A mulch is a layer of material applied to the surface of soil. Reasons for applying mulch include conservation of soil moisture, improving fertility and health of the soil, reducing weed growth and enhancing the visual appeal of the area. A mulch is usually, but not exclusively, organic in nature. It may be permanent (e.g. plastic sheeting) or temporary (e.g. bark chips). It may be applied to bare soil or around existing plants. Mulches of manure or compost will be incorporated naturally into the soil by the activity of worms and other organisms. The process is used both in commercial crop production and in gardening, and when applied correctly, can improve soil productivity. Living mulches include moss lawns and other ground covers. Uses Many materials are used as mulches, which are used to retain soil moisture, regulate soil temperature, suppress weed growth, and for aesthetics. They are applied to the soil surface, around trees, paths, flower beds, to prevent soil erosio ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stylet (anatomy)
A stylet is a hard, sharp, anatomical structure found in some invertebrates. For example, the word ''stylet'' or stomatostyle is used for the primitive piercing mouthparts of some nematodes and some nemerteans. In these groups the stylet is a hardened protrusible opening to the stomach. These stylets are adapted for the piercing of cell walls and usually function by providing the operative organism with access to the nutrients contained within the prey cell. The mouthparts of tardigrades, diptera and aphid Aphids are small sap-sucking insects and members of the superfamily Aphidoidea. Common names include greenfly and blackfly, although individuals within a species can vary widely in color. The group includes the fluffy white woolly aphids. A t ...s are also called stylets. In octopodes, the stylets are internal, needle-like bent rods within the mantle, the vestigial remnants of an external shell. References Nematode anatomy {{Animal-anatomy-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aphids
Aphids are small sap-sucking insects and members of the superfamily Aphidoidea. Common names include greenfly and blackfly, although individuals within a species can vary widely in color. The group includes the fluffy white woolly aphids. A typical life cycle involves flightless females giving live birth to female nymphs—who may also be already pregnant, an adaptation scientists call telescoping generations—without the involvement of males. Maturing rapidly, females breed profusely so that the number of these insects multiplies quickly. Winged females may develop later in the season, allowing the insects to colonize new plants. In temperate regions, a phase of sexual reproduction occurs in the autumn, with the insects often overwintering as eggs. The life cycle of some species involves an alternation between two species of host plants, for example between an annual crop and a woody plant. Some species feed on only one type of plant, while others are generalists, coloni ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Apium Virus Y
''Apium virus Y'' (ApVY) is a plant pathogenic virus in the genus ''Potyvirus'' and the virus family ''Potyviridae''. Apium virus Y is a recently described member of the potyvirus family. It was first found in Australia in 2002 in poison hemlock (''Conium maculatum'': an immigrant weed in Australia). A survey of native and weed species in the family Apiaceae found ApVY to be widespread in Australia. In addition, this survey and others found two other potyviruses. One was a well-known potyvirus infecting the Apiaceae, ''Celery mosaic virus'' (CeMV). CeMV has been found in celery (''Apium graveolens'') crops worldwide, including Australia, New Zealand and the US. The third potyvirus found in these surveys was another previously unknown potyvirus, ''Carrot virus Y'' (CarVY). Geographic distribution Since its sequence was first deposited in GenBank, ApVY has been found in New Zealand,J. Tang, G. R. G. Clover, and B. J. R. Alexander 2007. First Report of ''Apium virus Y'' in Cele ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chenopodiaceae
Amaranthaceae is a family of flowering plants commonly known as the amaranth family, in reference to its type genus ''Amaranthus''. It includes the former goosefoot family Chenopodiaceae and contains about 165 genera and 2,040 species, making it the most species-rich lineage within its parent order, Caryophyllales. Description Vegetative characters Most species in the Amaranthaceae are annual or perennial herbs or subshrubs; others are shrubs; very few species are vines or trees. Some species are succulent. Many species have stems with thickened nodes. The wood of the perennial stem has a typical "anomalous" secondary growth; only in subfamily Polycnemoideae is secondary growth normal. The leaves are simple and mostly alternate, sometimes opposite. They never possess stipules. They are flat or terete, and their shape is extremely variable, with entire or toothed margins. In some species, the leaves are reduced to minute scales. In most cases, neither basal nor terminal aggrega ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Apium Leptophyllum
''Cyclospermum leptophyllum'' (also, ''Ciclospermum l.'') is a species of plant in the family Apiaceae known by the common names marsh parsley, slender celery and fir-leaved celery. This is a plant found worldwide at warm temperate to tropical latitudes and is considered a noxious weed in many areas. It is a taprooted branching herb reaching just over half a meter in height at maximum. It has threadlike green leaves a few centimeters long and small umbel In botany, an umbel is an inflorescence that consists of a number of short flower stalks (called pedicels) that spread from a common point, somewhat like umbrella ribs. The word was coined in botanical usage in the 1590s, from Latin ''umbella'' "p ...s of spherical flowers. The 1889 book 'The Useful Native Plants of Australia’ records that a common name included "Wild Parsley" and that "It is worthy of note that this plant (in common with others of the genus) is sometimes acrid and injurious when grown in damp soils. It is, do ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ptilimnium
''Ptilimnium'' is a group of plants in the family Apiaceae described as a genus in 1819. The common name is mock bishopweed or mock bishop's weed. It is endemic to the United States, primarily in the Southeast, the Lower Mississippi Valley, and the Lower Great Plains. Species , Plants of the World Online accepted five species: * '' Ptilimnium ahlesii'' Weakley & G.L.Nesom * '' Ptilimnium capillaceum'' (Michx.) Raf. - SE + SC + NE USA * '' Ptilimnium costatum'' (Elliott) Raf. - SC USA * '' Ptilimnium nuttallii'' (DC.) Britton - SC USA * '' Ptilimnium texense'' J.M. Coult. & Rose - Texas, Louisiana, Florida ''Ptilimnium nodosum'' (Rose) Mathias, native to Georgia and South Carolina, is treated as ''Harperella nodosa ''Harperella'' is a monotypic genus of flowering plants in the family Apiaceae. Its only species is ''Harperella nodosa'' (synonym ''Ptilimnium nodosum''), known as piedmont mock bishopweed and harperella. It is native to riparian environments in t ...'' by Plants of t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Poison Hemlock
''Conium maculatum'', colloquially known as hemlock, poison hemlock or wild hemlock, is a highly poisonous biennial herbaceous flowering plant in the carrot family Apiaceae, native to Europe and North Africa. A hardy plant capable of living in a variety of environments, hemlock is widely naturalized in locations outside its native range, such as parts of Australia, West Asia, and North and South America, to which it has been introduced. It is capable of spreading and thereby becoming an invasive weed. All parts of the plant are toxic, especially the seeds and roots, and especially when ingested. Under the right conditions the plant grows quite rapidly during the growing season and can reach heights of , with a long penetrating root. The plant has a distinctive odour usually considered unpleasant that carries with the wind. The hollow stems are usually spotted with a dark maroon colour before the plant dies and becomes dry and brown after completing its biennial lifecycle. The ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dill
Dill (''Anethum graveolens'') is an annual herb in the celery family Apiaceae. It is the only species in the genus ''Anethum''. Dill is grown widely in Eurasia, where its leaves and seeds are used as a herb or spice for flavouring food. Growth Dill grows up to , with slender hollow stems and alternate, finely divided, softly delicate leaves long. The ultimate leaf divisions are broad, slightly broader than the similar leaves of fennel, which are threadlike, less than broad, but harder in texture. The flowers are white to yellow, in small umbels diameter. The seeds are long and thick, and straight to slightly curved with a longitudinally ridged surface. Etymology The word ''dill'' and its close relatives are found in most of the Germanic languages; its ultimate origin is unknown. The generic name ''Anethum'' is the Latin form of Greek ἄνῑσον / ἄνησον / ἄνηθον / ἄνητον, which meant both 'dill' and 'anise'. The form ''anīsum'' came to be used fo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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