Cassava (''Manihot esculenta''), also called yuca or manioc, a woody shrub of the Euphorbiaceae (spurge family) native to South America, is extensively cultivated as an annual crop in tropical and subtropical regions for its edible starchy tuberous root, a major source of carbohydrates. It differs from the similarly-spelled yucca, an unrelated fruit-bearing plant.
Cassava is the third-largest source of carbohydrates for meals in the world. Nigeria is the world's largest producer of cassava. It is classified as sweet or bitter, depending on the level of toxic cyanogenic glucosides. (However, bitter taste is not always a reliable measure.) Improper preparation of cassava can leave enough residual cyanide to cause acute cyanide intoxication and goiters, and has been linked to ataxia or partial paralysis. Nevertheless, farmers often prefer the bitter varieties because they deter pests, animals, and thieves. In some locations the more toxic varieties serve as a fall-back resource (a "food security crop") in times of famine.
Cassava is sometimes spelled cassaba or cassada. In English-language publications, the plant may be occasionally called by local names, such as ''mandioca'', ''aipim'', or ''macaxeira'' (Brazil), ''yuca'' (Cuba, Haiti, the Dominican Republic, Puerto Rico, El Salvador, Costa Rica, Panama, Venezuela, Colombia, Ecuador, Peru, Bolivia), ''mandi´o'' (Paraguay), ''akpu'', ''ege'' , ''rogo'', ''ugburu'', ''iwa'', ''nto-roro'' or ''ukuduk'' (Nigeria), ''banku'' (Ghana), ''bananku'' (Mali and other parts of West Africa), ''mogo'' or ''mihogo'' (Swahili-speaking Africa), ''pondu'' in (Lingala-speaking Africa), ''maravaLLi kilangu'' : மரவள்ளி கிழங்கு (Tamil), ''kappa'' (Malayalam), ''magngnokka'' : මඤ්ඤොක්කා (Sri Lanka), ''singkong'' (Indonesia), ''ubi kayu'' (Malaysia), ''kamoteng kahoy'' or ''balanghoy'' (Philippines), ''mushu'' (China), ''man sampalang'' (Thailand), ''karapendalam'' (Telegu), ''củ sắn'' or ''khoai mì'' (Vietnam), ''man thon'' (ມັນຕົ້ນ) (Laos), and ''manioke'' , ''tapioka'' or ''manioka'' (Polynesia).
Wild populations of ''M. esculenta'' subspecies ''flabellifolia'', shown to be the progenitor of domesticated cassava, are centered in west-central Brazil, where it was likely first domesticated no more than 10,000 years BP. By 6,600 BC, manioc pollen appears in the Gulf of Mexico lowlands, at the San Andrés archaeological site. The oldest direct evidence of cassava cultivation comes from a 1,400 year old Maya site, Joya de Cerén, in El Salvador. Although the species ''Manihot esculenta'' likely originated further south in Brazil and Paraguay. With its high food potential, it had become a staple food of the native populations of northern South America, southern Mesoamerica, and the Caribbean by the time of the Spanish conquest, and its cultivation was continued by the colonial Portuguese and Spanish. Forms of the modern domesticated species can be found growing in the wild in the south of Brazil. While there are several wild ''Manihot'' species, all varieties of ''M. esculenta'' are cultigens.
Cassava was a staple food for pre-Columbian peoples in the Americas, and is often portrayed in indigenous art. The Moche people often depicted yuca in their ceramics.
Since being introduced by Portuguese traders from Brazil in the 16th century, maize and cassava have replaced traditional African crops as the continent’s most important staple food crops. Cassava is sometimes described as the ‘bread of the tropics'.
Cassava, together with yams (''Dioscorea'' spp.) and sweet potatoes (''Ipomea batatas'') are important sources of food in the tropics. The cassava plant gives the highest yield of food energy per cultivated area per day among crop plants, except possibly for sugarcane. Cassava plays a particularly important role in agriculture in developing countries—especially in sub-Saharan Africa—because it does well on poor soils and with low rainfall, and because it is a perennial that can be harvested as required. Its wide harvesting window allows it to act as a famine reserve and is invaluable in managing labor schedules. It also offers flexibility to resource-poor farmers because it serves as either a subsistence or a cash crop.
While underground storage of cassava is advantageous for managing work schedules, it may also lead to reduced quality of the roots, sometimes leaving them unsuitable for many types of processing. In some areas, farmers have come to increasingly rely on dried cassava chips. A 1992 study (Nweke et al.) revealed about 42% of harvested cassava roots in West and East Africa are processed into dried chips and flour.
No continent depends as much on root and tuber crops in feeding its population as does Africa. In the humid and subhumid areas of tropical Africa, it is either a primary staple food or a secondary costaple. In Ghana, for example, cassava and yams occupy an important position the agricultural economy, and contribute about 46% of the agricultural gross domestic product (GDP). Cassava accounts for a daily caloric intake of 30% in Ghana, and is grown by nearly every farming family. The importance of cassava to many Africans is epitomised in the Ewe (a language spoken in Ghana, Togo and Benin) name for the plant, ''agbeli'', meaning "there is life." However, the price of cassava has risen significantly in the last half decade, and lower-income people have turned to other carbohydrate-rich foods such as rice.
In Tamil Nadu, one of the 28 states of India, the National Highway 68 between Thalaivasal and Attur has many cassava-processing factories alongside it—indicating an abundance of it in the neighborhood. Cassava is widely cultivated and eaten as a staple food in Andhra Pradesh and in Kerala.
In the subtropical region of southern China, cassava is the fifth largest crop in term of production, after rice, sweet potato, sugar cane, and maize. China is also the largest export market for cassava produced in Vietnam and Thailand. Over 60% of cassava production in China is concentrated in a single province, Guangxi, averaging over seven million tons annually.
Cassava can be cooked in various ways. The soft-boiled root has a delicate flavor and can replace boiled potatoes in many uses: as an accompaniment for meat dishes, or made into purées, dumplings, soups, stews, gravies, etc. Deep fried (after boiling or steaming), it can replace fried potatoes, with a distinctive flavor. ''Fufu'' is made from the starchy cassava-root flour. Tapioca (or fecula), essentially a flavourless starchy ingredient produced from treated and dried cassava (manioc) root, is used in cooking. It is similar to sago and is commonly used to make a milky pudding similar to rice pudding. ''Boba'' tapioca pearls are made from cassava root. It is also used in cereals for which several tribes in South America have used it extensively. It is also used in making cassava cake, a popular pastry. Cassava is used in making ''eba'', a popular food in Nigeria. ''Gari'' soakings is a delicacy in Ghana that cost less than US$1. One can simply soak ''gari'' in cold water, add a bit of sugar and roasted groundnut (peanut) to taste, and add whatever quantity of evaporated milk one desires. ''Gari'' soakings prepared with coconut water may taste better.
The juice of the bitter cassava, boiled to the consistency of thick syrup and flavored with spices, is called ''cassareep''. It is used as a basis for various sauces and as a culinary flavoring, principally in tropical countries. It is exported chiefly from Guyana.
The leaves can be pounded to a fine chaff and cooked as a palaver sauce (as is done in Liberia and Sierra Leone), usually with palm oil, but other vegetable oils can also be used. Palaver sauces contain meat and fish as well. It is necessary to wash the leaf chaff several times to remove the bitterness.
In Indonesia, cassava is an important food material. It can be cooked by frying or boiling or processed by fermentation to make ''tapai'' and ''getuk'' cake, while the starch is made into ''krupuk'' crackers. In time of famine or food shortage, cassava is used to replace rice.
In DR Congo, the leaves are used in a stew called ''pondu'' in Lingala, ''sombe'' in Swahili or ''sakasaka'' in Kikongo. The cassava root flour is also used to make a cassava bread by boiling flour until it is a thick, rubbery ball (''bukari'' in Swahili or ''luku'' in Kikongo. This cassava bread is often affectionately known as ''la boule nationale'' (the national ball) in French. The flour is also made into a paste and fermented before boiling after wrapping in banana or other forest leaves. This fermented state is called ''chikwangue'' in French or ''kwanga'' or ''nkwanga'' in Lingala and Kikongo. This last form has a long shelf life and is a preferred food to take on long trips where refrigeration is not possible.
Cassava was also used to make alcoholic beverages. The English explorer and naturalist Charles Waterton reported in ''Wanderings in South America'' (1836) that the natives of Guyana used cassava to make liquor, which they abandoned when rum became available. Hamilton Rice, in 1913, also remarked on liquor being made from cassava in the Brazilian rainforest.
The Indian tribes in northern Brazil and Surinam – Tiriós and Erwarhoyanas – make a beverage called ''sakurá'' with the sweet manioc variety of cassava, yuca. The same beverage is made by the Jivaro in Ecuador and Peru (the Shuara, Achuara, Aguaruna and Mayna people); they call it ''nijimanche''. As Michael Harner describes it:
The sweet manioc beer (''nihamanci'' or ''nijiamanchi''), is prepared by first peeling and washing the tubers in the stream near the garden. Then the water and manioc are brought to the house, where the tubers are cut up and put in a pot to boil. … The manioc is then mashed and stirred to a soft consistency with the aid of a special wooden paddle. While the woman stirs the mash, she chews handfuls [sic] of and spits them back into the pot, a process that may take half an hour or longer.
After the mash has been prepared it is transferred to a beer storage jar and left to ferment. … The resultant liquid tastes somewhat like a pleasingly alcoholic buttermilk and is most refreshing. The Jivaros consider it to be far superior to plain water, which they drink only in emergencies.
Societies that traditionally eat cassava generally understand some processing (soaking, cooking, fermentation, etc.) is necessary to avoid getting sick.
Symptoms of acute cyanide intoxication appear four or more hours after ingesting raw or poorly processed cassava: vertigo; vomiting; collapse. In some cases death may result within one or two hours. It can be treated easily with a shot of thiosulphate (which makes sulfur available for the patient's body to detoxify by converting the poisonous cyanide into thiocyanate).
"Chronic, low-level cyanide exposure is associated with the development of goiter and with tropical ataxic neuropathy, a nerve-damaging disorder that renders a person unsteady and uncoordinated. Severe cyanide poisoning, particularly during famines, is associated with outbreaks of a debilitating, irreversible paralytic disorder called konzo and, in some cases, death. The incidence of konzo and tropical ataxic neuropathy can be as high as 3 percent in some areas."
Brief soaking (4 hours) of cassava is not sufficient, but soaking for 18–24 hours can remove up to half the level of cyanide. Drying may not be sufficient, either.
For some smaller-rooted sweet varieties, cooking is sufficient to eliminate all toxicity. The cyanide is carried away in the processing water and the amounts produced in domestic consumption are too small to have environmental impact. The larger-rooted, bitter varieties used for production of flour or starch must be processed to remove the cyanogenic glucosides. and then ground into flour, which is then soaked in water, squeezed dry several times, and toasted. The starch grains that float to the surface during the soaking process are also used in cooking. The flour is used throughout South America and the Caribbean. Industrial production of cassava flour, even at the cottage level, may generate enough cyanide and cyanogenic glycosides in the effluents to have a severe environmental impact.
A safe processing method used by the pre-Columbian indigenous people of the Americas is to mix the cassava flour with water into a thick paste and then let it stand in the shade for five hours in a thin layer spread over a basket. In that time, about 5/6 of the cyanogenic glycosides are broken down by the linamarase; the resulting hydrogen cyanide escapes to the atmosphere, making the flour safe for consumption the same evening.
The traditional method used in West Africa is to peel the roots and put them into water for three days to ferment. The roots then are dried or cooked. In Nigeria and several other west African countries, including Ghana, Benin, Togo, Ivory Coast, and Burkina Faso, they are usually grated and lightly fried in palm oil to preserve them. The result is a foodstuff called ''gari''. Fermentation is also used in other places such as Indonesia (''see Tapai''). The fermentation process also reduces the level of antinutrients, making the cassava a more nutritious food.
The reliance on cassava as a food source and the resulting exposure to the goitrogenic effects of thiocyanate has been responsible for the endemic goiters seen in the Akoko area of southwestern Nigeria.
People dependent on cassava risk cyanide poisoning and malnutrition diseases such as kwashiorkor and endemic goiter.
A project called "BioCassava Plus" is developing a cassava with lower cyanogen glucosides and fortified with Vitamin A, iron and protein to help the nutrition of people in sub-saharan Africa. In 2011 the director of the program said he hoped to obtain regulatory approvals by 2017.
PPD is one of the main obstacles currently preventing farmers from exporting cassavas abroad and generating income. Cassava can be preserved in various ways such as coating in wax or freezing.
The major cause of losses during cassava chip storage is infestation by insects. A wide range of species that feed directly on the dried chips have been reported as the cause of weight loss in the stored produce. Some loss assessment studies and estimations on dried cassava chips have been carried out in different countries. Hiranandan and Advani (1955) measured 12 - 14% post-harvest weight losses in India for chips stored for about five months. Killick (1966) estimated for Ghana that 19% of the harvest cassava roots are lost annually, and Nicol (1991) estimated a 15 - 20% loss of dried chips stored for eight months. Pattinson (1968) estimated for Tanzania a 12% weight loss of cassava chips stored for five months, and Hodges et al. (1985) assessed during a field survey postharvest losses of up to 19% after 3 months and up to 63% after four to five months due to the infestation of ''Prostephanus truncatus'' (Horn). In Togo, Stabrawa (1991) assessed postharvest weight losses of 5% after one month of storage and 15% after three months of storage due to insect infestation, and Compton (1991) assessed weight losses of about 9% for each store in the survey area in Togo. Wright et al. (1993) assessed postharvest losses of chips of about 14% after four months of storage, about 20% after seven month of storage and up to 30% when ''P. truncatus'' attacked the dried chips. In addition, Wright et al. (1993) estimated about 4% of the total national cassava production in Togo is lost during the chip storage. This was about equivalent to 0.05% of the GNP in 1989.
Plant breeding has resulted in cassava that is tolerant to PPD. Sánchez et al. identified four different sources of tolerance to PPD. One comes from Walker's Manihot (''M. walkerae'') of southern Texas in the United States and Tamaulipas in Mexico. A second source was induced by mutagenic levels of gamma rays, which putatively silenced one of the genes involved in PPD genesis. A third source was a group of high-carotene clones. The antioxidant properties of carotenoids are postulated to protect the roots from PPD (basically an oxidative process). Finally, tolerance was also observed in a waxy-starch (amylose-free) mutant. This tolerance to PPD was thought to be cosegregated with the starch mutation, and is not a pleiotropic effect of the latter.
In Africa, the cassava mealybug (''Phenacoccus manihoti'') and cassava green mite (''Mononychellus tanajoa'') can cause up to 80% crop loss, which is extremely detrimental to the production of subsistence farmers. These pests were rampant in the 1970s and 1980s, but were brought under control following the establishment of the Biological Control Center for Africa of the IITA under the leadership of Dr. Hans Rudolf Herren. The Centre investigated biological control for cassava pests; two South American natural enemies ''Apoanagyrus lopezi'' (a parasitoid wasp) and ''Typhlodromalus aripo'' (a predatory mite) were found to effectively control the cassava mealybug and the cassava green mite, respectively.
The cassava mosaic virus causes the leaves of the cassava plant to wither, limiting the growth of the root. The virus caused a major African famine in the 1920s. The virus is spread by the whitefly and by the transplanting of diseased plants into new fields. Sometime in the late 1980s, a mutation occurred in Uganda that made the virus even more harmful, causing the complete loss of leaves. This mutated virus has been spreading at a rate of 50 miles per year, and as of 2005 may be found throughout Uganda, Rwanda, Burundi, the Democratic Republic of the Congo and the Republic of the Congo.
Recently, brown streak disease has been identified as a major threat to cassava cultivation worldwide.
A wide range of plant parasitic nematodes have been reported associated with cassava worldwide. These include ''Pratylenchus brachyurus''., ''Rotylenchulus reniformis'', ''Helicotylenchus.spp'', ''Scutellonema spp.'' and ''Meloidogyne spp.'', of which ''Meloidogyne incognita'' and ''Meloidogyne javanica'' are the most widely reported and economically important. ''Meloidogyne spp.'' feeding produces physically damaging galls with eggs inside them. Galls later merge as the females grow and enlarge, they interfere with water and nutrient supply. Cassava roots become tough with age and restrict the movement of the juveniles and the egg release. It is therefore possible that extensive galling can be observed even at low densities following infection. Other pest and diseases can gain entry through the physical damage caused by gall formation leading to rots.They have not been shown to cause direct damage to the enlarged storage roots, but plants can have reduced height if there was loss of enlarged root weight.
Research on nematode pests of cassava is still in the early stages, results on the response of cassava is therefore not consistent, ranging from negligible to seriously damaging. Since nematodes have such a seemingly erratic distribution in cassava agricultural fields, it is not easy to clearly define the level of direct damage attributed to nematodes and thereafter quantify the success of a chosen management method. It has been found that the use of nematicides results in a lower number of galls per feeder root compared to a control, coupled with a lower number of rots in the storage roots. The nematicide (Femaniphos) when used did not affect crop growth and yield parameter variables measured at harvest. Nematicide use in cassava is neither practical nor sustainable, currently the use of tolerant and resistant varieties is the most practical and sustainable management method.
Category:Crops originating from the Americas Category:Euphorbiaceae Category:Flora of Jamaica Category:Flora of South America Category:Jamaican cuisine Category:Puerto Rican ingredients Category:Root vegetables Category:Staple foods Category:Tropical agriculture Category:Tubers
ar:كاسافا gn:Mandi'o bjn:Jawaw zh-min-nan:Chhiū-chî bg:Маниока ca:Tapioca cs:Maniok jedlý ny:Chinangwa da:Kassava de:Maniok es:Manihot esculenta eo:Manioko eu:Manioka fr:Manioc ko:카사바 ha:Rogo hsb:Prawy maniok hr:Manioka io:Manioko ilo:Balinghoy id:Singkong it:Manihot esculenta he:מניהוט מצוי jv:Ketéla pohung kg:Mandioko ht:Manyòk dous la:Mandioca lv:Manioka lt:Valgomasis manijokas ln:Manyɔ́kɔ ms:Ubi kayu nah:Cuauhcamohtli nl:Cassave ja:キャッサバ no:Maniok pl:Maniok jadalny pt:Mandioca qu:Rumu ru:Маниок simple:Manioc sh:Manioka su:Sampeu fi:Maniokki sv:Maniok ta:மரவள்ளி th:มันสำปะหลัง to:Mānioke tr:Manyok uk:Маніок vi:Sắn yo:Ẹ̀gẹ́ zh:木薯
This text is licensed under the Creative Commons CC-BY-SA License. This text was originally published on Wikipedia and was developed by the Wikipedia community.
name | Augustus Pablo |
---|---|
background | non_performing_personnel |
birth name | Horace Swaby |
birth date | June 21, 1954 |
death date | May 18, 1999 |
origin | St. Andrew, Jamaica |
instrument | Keyboard, melodica |
genre | Roots reggae, dub |
occupation | Record producer, instrumentalist |
years active | 1970s–1999 |
associated acts | Now Generation |
notable instruments | }} |
Horace Swaby (June 21, 1954 – May 18, 1999), better known as Augustus Pablo, was a Jamaican roots reggae and dub record producer, melodica player and keyboardist, active from the 1970s onwards. He popularized the use of the melodica (an instrument at that time primarily used to teach children music in the Jamaican public schools) in reggae music. He was a committed Rastafarian.
"East of the River Nile", a unique blend of East Asian and Jamaican sounds, became a moderate hit. He soon joined Now Generation (Mikey Chung's band) and played the keyboard with them while his friend Clive Chin began his own career as a record producer. Pablo and Chin recorded "Java" (1972) together, as soon as Pablo quit Now Generation and Clive was able to get the studio time. This instrumental was a massive hit and launched Pablo's solo career. He recorded with Chin and various others, including Leonard Chin, his uncle, and Lee Perry. He scored another smash hit with "My Desire" (John Holt).
Pablo formed the labels Hot Stuff, Message and Rockers (named after his brother's soundsystem, Rockers), and released a steady stream of well-received instrumentals, mostly versions of older hits from Studio One. In spite of his success with Rockers, Pablo's 1974 album, ''This Is Augustus Pablo'' was recorded with Clive and Pat Chin. This was followed by a collaboration with the legendary reggae engineer King Tubby, 1975's ''Ital Dub''.
In the later 1970s, Pablo produced a steady stream of hits, including the hit "Black Star Liner" (Fred Locks). He also worked with Dillinger, Norris Reid, I-Roy, Jacob Miller, Te -Track, The Immortals, Paul Blackman, Earl Sixteen, Roman Stewart, Lacksley Castell, The Heptones, Bob Marley, Ricky Grant, Delroy Wilson, Junior Delgado, Horace Andy and Freddy McKay. This period was eventually commemorated with critically acclaimed LPs including ''King Tubby Meets Rockers Uptown'' (1976) and Hugh Mundell's classic ''Africa Must be Free by 1983''. This was followed by ''East of the River Nile'' (1978), ''Original Rockers'' (1979) and ''Rockers Meets King Tubby in a Firehouse'', another acclaimed hit album.
In the 1980s, Pablo's career slowed significantly. In 1980, he appeared on the soundtrack of the documentary ''D.O.A''. He had begun to establish an American audience and released ''Rising Sun'' in 1986 to good reviews and sales. Pablo also produced memorable hits, including "Ragamuffin Year" (Junior Delgado), "Humble Yourself" (Asher & Tremble) and "Far Far Away" (Ricky Grant). In addition, he toured extensively throughout the world, making a memorable live album in Tokyo in 1987. That same year, ''Rockers Come East'' re-established his career and he began to release a series of critically acclaimed though somewhat inaccessible albums in the 1990s, including ''Blowing With the Wind'' and also producing several, such as "Night & Day" (single)'' (Dawn Penn) and "Jah Made Them All" (Yami Bolo).
Augustus Pablo died as a result of a collapsed lung on 18 May 1999. He had been suffering for some time from the nerve disorder Myasthenia gravis.
Category:1953 births Category:1999 deaths Category:Dub musicians Category:Keyboardists Category:Melodica players Category:People from Saint Andrew Parish, Jamaica Category:Jamaican reggae musicians Category:Jamaican record producers Category:Jamaican Rastafarians Category:Deaths from respiratory failure
de:Augustus Pablo es:Augustus Pablo eu:Augustus Pablo fr:Augustus Pablo it:Augustus Pablo ht:Augustus Pablo hu:Augustus Pablo nl:Augustus Pablo nds-nl:Augustus Pablo ja:オーガスタス・パブロ no:Augustus Pablo pl:Augustus Pablo pt:Augustus Pablo sl:Augustus Pablo sv:Augustus PabloThis text is licensed under the Creative Commons CC-BY-SA License. This text was originally published on Wikipedia and was developed by the Wikipedia community.
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