Orange ( fruit ) - Wikipedia Orange ( fruit ) This article is about the fruit. For the colour, see Orange ( colour ). For the painting also called `` Orange Trees '', see Les Orangers. For other meanings, see Orange ( disambiguation ). An orange, whole and split Orange blossoms and oranges on tree Oranges and orange juice The orange is the fruit of the citrus species Citrus × sinensis in the family Rutaceae. It is also called sweet orange, to distinguish it from the related Citrus × aurantium, referred to as bitter orange. The sweet orange reproduces asexually ( apomixis through nucellar embryony ) ; varieties of sweet orange arise through mutations. The orange is a hybrid between pomelo ( Citrus maxima ) and mandarin ( Citrus reticulata ). It has genes that are ~ 25 % pomelo and ~ 75 % mandarin ; however, it is not a simple backcrossed BC1 hybrid, but hybridized over multiple generations. The chloroplast genes, and therefore the maternal line, seem to be pomelo. The sweet orange has had its full genome sequenced. Earlier estimates of the percentage of pomelo genes varying from ~ 50 % to 6 % have been reported. Sweet oranges were mentioned in Chinese literature in 314 BC. As of 1987, orange trees were found to be the most cultivated fruit tree in the world. Orange trees are widely grown in tropical and subtropical climates for their sweet fruit. The fruit of the orange tree can be eaten fresh, or processed for its juice or fragrant peel. As of 2012, sweet oranges accounted for approximately 70 % of citrus production. In 2014, 70.9 million tonnes of oranges were grown worldwide, with Brazil producing 24 % of the world total followed by China and India. Contents 1 Botanical information and terminology 2 Etymology 3 History 4 Varieties 4.1 Common oranges 4.1. 1 Valencia 4.1. 2 Hart 's Tardiff Valencia 4.1. 3 Hamlin 4.1. 4 Other varieties of common oranges 4.2 Navel oranges 4.2. 1 Cara cara navels 4.2. 2 Other varieties of navels 4.3 Blood oranges 4.3. 1 Other varieties of blood oranges 4.4 Acidless oranges 5 Attributes 5.1 Sensory factors 5.2 Nutritional value and phytochemicals 5.3 Grading 6 Cultivation 6.1 Climate 6.2 Propagation 6.3 Harvest 6.4 Degreening 6.5 Storage 6.6 Pests and diseases 6.6. 1 Cottony cushion scale 6.6. 2 Citrus greening disease 6.6. 3 Greasy spot 7 Production 8 Juice and other products 8.1 Products made from oranges 9 See also 10 References 11 External links Botanical Information and terminology Main article : Citrus taxonomy All citrus trees belong to the single genus Citrus and remain almost entirely interfertile. This includes grapefruits, lemons, limes, oranges, and various other types and hybrids. As the interfertility of oranges and other citrus has produced numerous hybrids and cultivars, and bud mutations have also been selected, their taxonomy is fairly controversial, confusing or inconsistent. The fruit of any citrus tree is considered a hesperidium, a kind of modified berry ; it is covered by a rind originated by a rugged thickening of the ovary wall. Different names have been given to the many varieties of the genus. Orange applies primarily to the sweet orange -- Citrus sinensis ( L. ) Osbeck. The orange tree is an evergreen, flowering tree, with an average height of 9 to 10 m ( 30 to 33 ft ), although some very old specimens can reach 15 m ( 49 ft ). Its oval leaves, alternately arranged, are 4 to 10 cm ( 1.6 to 3.9 in ) long and have crenulate margins. Sweet oranges grow in a range of different sizes, and shapes varying from spherical to oblong. Inside and attached to the rind is a porous white tissue, the white, bitter mesocarp or albedo ( pith ). The orange contains a number of distinct carpels ( segments ) inside, typically about ten, each delimited by a membrane, and containing many juice - filled vesicles and usually a few seeds ( pips ). When unripe, the fruit is green. The grainy irregular rind of the ripe fruit can range from bright orange to yellow - orange, but frequently retains green patches or, under warm climate conditions, remains entirely green. Like all other citrus fruits, the sweet orange is non-climacteric. The Citrus sinensis group is subdivided into four classes with distinct characteristics : common oranges, blood or pigmented oranges, navel oranges, and acidless oranges. Other citrus groups also known as oranges are : Bitter orange ( Citrus aurantium ), also known as Seville orange, sour orange ( especially when used as rootstock for a sweet orange tree ), bigarade orange and marmalade orange. Like the sweet orange, it is a pomelo x mandarin hybrid. Bergamot orange ( Citrus bergamia Risso ), grown mainly in Italy for its peel, producing a primary essence for perfumes, also used to flavor Earl Grey tea. It is a hybrid, probably bitter orange x limetta. Trifoliate orange ( Poncirus trifoliata ), sometimes included in the genus ( classified as Citrus trifoliata ). It often serves as a rootstock for sweet orange trees and other Citrus cultivars. Mandarin orange ( Citrus reticulata ) is an original species of citrus, and is a progenitor of the common orange. An enormous number of cultivars have, like the sweet orange, a mix of pomelo and mandarin ancestry. Some cultivars are mandarin - pomelo hybrids, bred from the same parents as the sweet orange ( e.g. the tangor and ponkan tangerine ). Other cultivars are sweet orange x mandarin hybrids ( e.g. clementines ). Mandarin traits generally include being smaller and oblate, easier to peel, and less acidic. Pomelo traits include a thick white albedo ( rind pith, mesocarp ) that is more closely attached to the segments. Orange trees generally are grafted. The bottom of the tree, including the roots and trunk, is called rootstock, while the fruit - bearing top has two different names : budwood ( when referring to the process of grafting ) and scion ( when mentioning the variety of orange ). Etymology Main article : Orange ( word ) The word orange derives from the Sanskrit word for `` orange tree '' ( नारङ्ग nāraṅga ), which in turn derives from a Dravidian root word ( from நரந்தம் narandam which refers to Bitter orange in Tamil ). The Sanskrit word reached European languages through Persian نارنگ ( nārang ) and its Arabic derivative نارنج ( nāranj ). The word entered Late Middle English in the fourteenth century via Old French orenge ( in the phrase pomme d'orenge ). The French word, in turn, comes from Old Provençal auranja, based on Arabic nāranj. In several languages, the initial n present in earlier forms of the word dropped off because it may have been mistaken as part of an indefinite article ending in an n sound -- in French, for example, une norenge may have been heard as une orenge. This linguistic change is called juncture loss. The color was named after the fruit, and the first recorded use of orange as a color name in English was in 1512. A closeup of an orange blossom As Portuguese merchants were presumably the first to introduce the sweet orange to some regions of Europe, in several modern Indo - European languages the fruit has been named after them. Some examples are Albanian portokall, Bulgarian портокал ( portokal ), Greek πορτοκάλι ( portokali ), Macedonian portokal, Persian پرتقال ( porteghal ), Turkish portakal and Romanian portocală. Related names can be found in other languages, such as Arabic البرتقال ( bourtouqal ), Georgian ფორთოხალი ( phorthoxali ), Turkish portakal and Amharic birtukan. Also, in some of the Italian regional languages ( e.g. Neapolitan ), an orange is portogallo or purtuallo, literally `` ( the ) Portuguese ( one ) '', in contrast to the Italian arancia. In other Indo - European languages, the words for orange allude to the eastern origin of the fruit and can be translated literally as `` apple from China ''. Some examples are German Apfelsine ( alternative name for Orange and common in northern Germany ), Dutch appelsien and sinaasappel, Swedish apelsin, and Norwegian appelsin. A similar case is Puerto Rican Spanish china. Various Slavic languages use the variants pomaranč ( Slovak ), pomeranč ( Czech ), pomaranča ( Slovene ), and pomarańcza ( Polish ), all from Old French pomme d'orenge. History Yellow Oranges and Green Tangerines by Zhao Lingrang, Chinese fan painting from the Song dynasty ( NPM ) The orange is unknown in the wild state ; it is assumed to have originated in southern China, northeastern India, and perhaps southeastern Asia, and that they were first cultivated in China around 2500 BC. In Europe, the Moors introduced the orange to Spain which was known as Al - Andalus, modern Andalusia, with large scale cultivation starting in the 10th century as evidenced by complex irrigation techniques specifically adapted to support orange orchards. Citrus fruits -- among them the bitter orange -- were introduced to Sicily in the 9th century during the period of the Emirate of Sicily, but the sweet orange was unknown until the late 15th century or the beginnings of the 16th century, when Italian and Portuguese merchants brought orange trees into the Mediterranean area. Shortly afterward, the sweet orange quickly was adopted as an edible fruit. It also was considered a luxury item and wealthy people grew oranges in private conservatories, called orangeries. By 1646, the sweet orange was well known throughout Europe. Louis XIV of France had a great love of orange trees, and built the grandest of all royal Orangeries at the Palace of Versailles. At Versailles potted orange trees in solid silver tubs were placed throughout the rooms of the palace, while the Orangerie allowed year - round cultivation of the fruit to supply the court. When Louis condemned his finance minister, Nicolas Fouquet, in 1664, part of the treasures which he confiscated were over 1,000 orange trees from Fouquet 's estate at Vaux - le - Vicomte. Spanish travelers introduced the sweet orange into the American continent. On his second voyage in 1493, Christopher Columbus may have planted the fruit in Hispaniola. Subsequent expeditions in the mid-1500s brought sweet oranges to South America and Mexico, and to Florida in 1565, when Pedro Menéndez de Avilés founded St Augustine. Spanish missionaries brought orange trees to Arizona between 1707 and 1710, while the Franciscans did the same in San Diego, California, in 1769. An orchard was planted at the San Gabriel Mission around 1804 and a commercial orchard was established in 1841 near present - day Los Angeles. In Louisiana, oranges were probably introduced by French explorers. Archibald Menzies, the botanist and naturalist on the Vancouver Expedition, collected orange seeds in South Africa, raised the seedlings onboard and gave them to several Hawaiian chiefs in 1792. Eventually, the sweet orange was grown in wide areas of the Hawaiian Islands, but its cultivation stopped after the arrival of the Mediterranean fruit fly in the early 1900s. As oranges are rich in vitamin C and do not spoil easily, during the Age of Discovery, Portuguese, Spanish, and Dutch sailors planted citrus trees along trade routes to prevent scurvy. Florida farmers obtained seeds from New Orleans around 1872, after which orange groves were established by grafting the sweet orange on to sour orange rootstocks. Varieties Common oranges Common oranges ( also called `` white '', `` round '', or `` blond '' oranges ) constitute about two - thirds of all the orange production. The majority of this crop is used mostly for juice extraction. Valencia Main article : Valencia orange An orange grove in Florida The Valencia orange is a late - season fruit, and therefore a popular variety when navel oranges are out of season. This is why an anthropomorphic orange was chosen as the mascot for the 1982 FIFA World Cup, held in Spain. The mascot was named Naranjito ( `` little orange '' ) and wore the colors of the Spanish national football team. Hart 's tardiff Valencia Thomas Rivers, an English nurseryman, imported this variety from the Azores Islands and catalogued it in 1865 under the name Excelsior. Around 1870, he provided trees to S.B. Parsons, a Long Island nurseryman, who in turn sold them to E.H. Hart of Federal Point, Florida. Hamlin This cultivar was discovered by A.G. Hamlin near Glenwood, Florida, in 1879. The fruit is small, smooth, not highly colored, and juicy, with a pale yellow colored juice, especially in fruits that come from lemon rootstock. The fruit may be seedless, or may contain a number of small seeds. The tree is high - yielding and cold - tolerant and it produces good quality fruit, which is harvested from October to December. It thrives in humid subtropical climates. In cooler, more arid areas, the trees produce edible fruit, but too small for commercial use. Trees from groves in hammocks or areas covered with pine forest are budded on sour orange trees, a method that gives a high solids content. On sand, they are grafted on rough lemon rootstock. The Hamlin orange is one of the most popular juice oranges in Florida and replaces the Parson Brown variety as the principal early - season juice orange. This cultivar is now the leading early orange in Florida and, possibly, in the rest of the world. Other varieties of common oranges Bali : grown in Bali, Indonesia. Larger than other orange Belladonna : grown in Italy Berna : grown mainly in Spain Biondo Comune ( `` ordinary blond '' ) : widely grown in the Mediterranean basin, especially in North Africa, Egypt, Greece ( where it is called `` koines '' ), Italy ( where it is also known as `` Liscio '' ), and Spain ; it also is called `` Beledi '' and `` Nostrale '' ; in Italy, this variety ripens in December, earlier than the competing Tarocco variety Biondo Riccio : grown in Italy Cadanera : a seedless orange of excellent flavor grown in Algeria, Morocco, and Spain ; it begins to ripen in November and is known by a wide variety of trade names, such as Cadena Fina, Cadena sin Jueso, Precoce de Valence ( `` early from Valencia '' ), Precoce des Canaries, and Valence san Pepins ( `` seedless Valencia '' ) ; it was first grown in Spain in 1870 Calabrese or Calabrese Ovale : grown in Italy Carvalhal : grown in Portugal Castellana : grown in Spain Cherry Orange : grown in southern China and Japan Clanor : grown in South Africa Dom João : grown in Portugal Fukuhara : grown in Japan Gardner : grown in Florida, this mid-season orange ripens around the beginning of February, approximately the same time as the Midsweet variety ; Gardner is about as hardy as Sunstar and Midsweet Homosassa : grown in Florida Jaffa orange : grown in the Middle East, also known as `` Shamouti '' Jincheng : the most popular orange in China Joppa : grown in South Africa and Texas Khettmali : grown in Israel and Lebanon Play media A cross cutting scan of the interior of an orange Kona : a type of Valencia orange introduced in Hawaii in 1792 by Captain George Vancouver ; for many decades in the nineteenth century, these oranges were the leading export from the Kona district on the Big Island of Hawaii ; in Kailua - Kona, some of the original stock still bears fruit Lue Gim Gong : grown in Florida, is an early scion developed by Lue Gim Gong, a Chinese immigrant known as the `` Citrus Genius '' ; in 1888, Lue cross-pollinated two orange varieties -- the Hart 's late Valencia and the Mediterranean Sweet -- and obtained a fruit both sweet and frost - tolerant ; this variety was propagated at the Glen St. Mary Nursery, which in 1911 received the Silver Wilder Medal by the American Pomological Society ; originally considered a hybrid, the Lue Gim Gong orange was later found to be a nucellar seedling of the Valencia type, which is properly called Lue Gim Gong ; since 2006, the Lue Gim Gong variety is grown in Florida, although sold under the general name Valencia Macetera : grown in Spain, it is known for its unique flavor Orange seedling -- although a hybrid, orange usually comes true from seed, through maternal apomixis Malta : grown in Pakistan Maltaise Blonde : grown in north Africa Maltaise Ovale : grown in South Africa and in California under the names of Garey 's or California Mediterranean Sweet Marrs : grown in Texas, California and Iran, it is relatively low in acid Medan : grown in Medan, Indonesia Midsweet : grown in Florida, it is a newer scion similar to the Hamlin and Pineapple varieties, it is hardier than Pineapple and ripens later ; the fruit production and quality are similar to those of the Hamlin, but the juice has a deeper color Moro Tarocco : grown in Italy, it is oval, resembles a tangelo, and has a distinctive caramel - colored endocarp ; this color is the result of a pigment called anthocarpium, not usually found in citruses, but common in red fruits and flowers ; the original mutation occurred in Sicily in the seventeenth century Mosambi : grown in India and Pakistan, it is so low in acid and insipid that it might be classified as acidless Narinja : grown in Andhra, South India Parson Brown : grown in Florida, Mexico, and Turkey, it once was a widely grown Florida juice orange, its popularity has declined since new varieties with more juice, better yield, and higher acid and sugar content have been developed ; it originated as a chance seedling in Florida in 1865 ; its fruits are round, medium large, have a thick, pebbly peel and contain 10 to 30 seeds ; it still is grown because it is the earliest maturing fruit in the United States, usually maturing in early September in the Valley district of Texas, and from early October to January in Florida ; its peel and juice color are poor, as is the quality of its juice Pera : grown in Brazil, it is very popular in the Brazilian citrus industry and yielded 7.5 million metric tons in 2005 Pera Coroa : grown in Brazil Pera Natal : grown in Brazil Pera Rio : grown in Brazil Pineapple : grown in North and South America and India Pontianak : oval - shaped orange grown especially in Pontianak, Indonesia Premier : grown in South Africa Rhode Red : is a mutation of the Valencia orange, but the color of its flesh is more intense ; it has more juice, and less acidity and vitamin C than the Valencia ; it was discovered by Paul Rhode in 1955 in a grove near Sebring, Florida Roble : it was first shipped from Spain in 1851 by Joseph Roble to his homestead in what is now Roble 's Park in Tampa, Florida ; it is known for its high sugar content Queen : grown in South Africa Salustiana : grown in North Africa Sathgudi : grown in Tamil Nadu, South India Seleta, Selecta : grown in Australia and Brazil, it is high in acid Shamouti Masry : grown in Egypt ; it is a richer variety of Shamouti Sunstar : grown in Florida, this newer cultivar ripens in mid-season ( December to March ) and it is more resistant to cold and fruit - drop than the competing Pineapple variety ; the color of its juice is darker than that of the competing Hamlin Tomango : grown in South Africa Verna : grown in Algeria, Mexico, Morocco, and Spain Vicieda : grown in Algeria, Morocco, and Spain Westin : grown in Brazil Xã Đoài orange : grown in Vietnam Navel oranges A navel orange, peeled and sectioned ; the underdeveloped twin fruit is located on the bottom right Navel oranges are characterized by the growth of a second fruit at the apex, which protrudes slightly and resembles a human navel. They are primarily grown for human consumption for various reasons : their thicker skin makes them easy to peel, they are less juicy and their bitterness -- a result of the high concentrations of limonin and other limonoids -- renders them less suitable for juice. Their widespread distribution and long growing season have made navel oranges very popular. In the United States, they are available from November to April, with peak supplies in January, February, and March. In this navel orange, the second fruit can clearly be seen at the base. According to a 1917 study by Palemon Dorsett, Archibald Dixon Shamel and Wilson Popenoe of the United States Department of Agriculture ( USDA ), a single mutation in a Selecta orange tree planted on the grounds of a monastery near Bahia, Brazil, probably yielded the first navel orange between 1810 and 1820. Nevertheless, a researcher at the University of California, Riverside, has suggested that the parent variety was more likely the Portuguese navel orange ( Umbigo ), described by Antoine Risso and Pierre Antoine Poiteau in their book Histoire naturelle des orangers ( `` Natural History of Orange Trees '', 1818 -- 1822 ). The mutation caused the orange to develop a second fruit at its base, opposite the stem, embedded within the peel of the primary orange. Navel oranges were introduced in Australia in 1824 and in Florida in 1835. In 1870, twelve cuttings of the original tree were transplanted to Riverside, California, where the fruit became known as `` Washington ''. This cultivar was very successful, and rapidly spread to other countries. Because the mutation left the fruit seedless and, therefore, sterile, the only method to cultivate navel oranges was to graft cuttings onto other varieties of citrus trees. The California Citrus State Historic Park and the Orcutt Ranch Horticulture Center preserve the history of navel oranges in Riverside. Today, navel oranges continue to be propagated through cutting and grafting. This does not allow for the usual selective breeding methodologies, and so all navel oranges can be considered fruits from that single, nearly two - hundred - year - old tree : they have exactly the same genetic make - up as the original tree and are, therefore, clones. This case is similar to that of the common yellow seedless banana, the Cavendish, or that of the Granny Smith apple. On rare occasions, however, further mutations can lead to new varieties. Cara cara navels Cara cara orange slices ( left ) Cara cara oranges ( also called `` red navel '' ) are a type of navel orange grown mainly in Venezuela, South Africa and in California 's San Joaquin Valley. They are sweet and comparatively low in acid, with a bright orange rind similar to that of other navels, but their flesh is distinctively pinkish red. It is believed that they have originated as a cross between the Washington navel and the Brazilian Bahia navel, and they were discovered at the Hacienda Cara Cara in Valencia, Venezuela, in 1976. South African cara caras are ready for market in early August, while Venezuelan fruits arrive in October and Californian fruits in late November. Other varieties of navels Bahianinha or Bahia Dream Navel Late Navel Washington or California Navel Blood oranges Comparison between the inside and the outside of regular and blood oranges ( two segments at upper left ) Main article : Blood orange Blood oranges are a natural mutation of C. sinensis, although today the majority of them are hybrids. High concentrations of anthocyanin give the rind, flesh, and juice of the fruit their characteristic dark red color. Blood oranges were first discovered and cultivated in Sicily in the fifteenth century. Since then they have spread worldwide, but are grown especially in Spain and Italy under the names of sanguina and sanguinella, respectively. The blood orange, with its distinct color and flavor, is generally considered favorably as a juice, and has found a niche as an ingredient variation in traditional Seville marmalade. Other varieties of blood oranges Maltese : a small and highly colored variety, generally thought to have originated in Italy as a mutation and cultivated there for centuries. It also is grown extensively in southern Spain and Malta. It is used in sorbets and other desserts due to its rich burgundy color. Moro : originally from Sicily, it is common throughout Italy. This medium - sized fruit has a relatively long harvest, which lasts from December to April. Sanguinelli : a mutant of the Doble Fina, discovered in 1929 in Almenara, in the Castellón province of Spain. It is cultivated in Sicily. Scarlet navel : a variety with the same mutation as the navel orange. Tarocco : a relatively new variety developed in Italy. It begins to ripen in late January. Acidless oranges Acidless oranges are an early - season fruit with very low levels of acid. They also are called `` sweet '' oranges in the United States, with similar names in other countries : douce in France, sucrena in Spain, dolce or maltese in Italy, meski in North Africa and the Near East ( where they are especially popular ), şeker portakal ( `` sugar orange '' ) in Turkey, succari in Egypt, and lima in Brazil. The lack of acid, which protects orange juice against spoilage in other groups, renders them generally unfit for processing as juice, so they are primarily eaten. They remain profitable in areas of local consumption, but rapid spoilage renders them unsuitable for export to major population centres of Europe, Asia, or the United States. Attributes Sensory factors Octyl acetate, a volatile compound contributing to the fragrance of oranges The taste of oranges is determined mainly by the relative ratios of sugars and acids, whereas orange aroma derives from volatile organic compounds, including alcohols, aldehydes, ketones, terpenes, and esters. Bitter limonoid compounds, such as limonin, decrease gradually during development, whereas volatile aroma compounds tend to peak in mid -- to late -- season development. Taste quality tends to improve later in harvests when there is a higher sugar / acid ratio with less bitterness. As a citrus fruit, the orange is acidic, with pH levels ranging from 2.9 to 4.0. Sensory qualities vary according to genetic background, environmental conditions during development, ripeness at harvest, postharvest conditions, and storage duration. Oranges, raw, all commercial varieties Nutritional value per 100 g ( 3.5 oz ) Energy 197 kJ ( 47 kcal ) Carbohydrates 11.75 g Sugars 9.35 g Dietary fiber 2.4 g Fat 0.12 g Protein 0.94 g Vitamins Vitamin A equiv. ( 1 % ) 11 μg Thiamine ( B1 ) ( 8 % ) 0.087 mg Riboflavin ( B2 ) ( 3 % ) 0.04 mg Niacin ( B3 ) ( 2 % ) 0.282 mg Pantothenic acid ( B5 ) ( 5 % ) 0.25 mg Vitamin B6 ( 5 % ) 0.06 mg Folate ( B9 ) ( 8 % ) 30 μg Choline ( 2 % ) 8.4 mg Vitamin C ( 64 % ) 53.2 mg Vitamin E ( 1 % ) 0.18 mg Minerals Calcium ( 4 % ) 40 mg Iron ( 1 % ) 0.1 mg Magnesium ( 3 % ) 10 mg Manganese ( 1 % ) 0.025 mg Phosphorus ( 2 % ) 14 mg Potassium ( 4 % ) 181 mg Zinc ( 1 % ) 0.07 mg Other constituents Water 86.75 g Link to USDA Database entry Units μg = micrograms mg = milligrams IU = International units Percentages are roughly approximated using US recommendations for adults. Source : USDA Nutrient Database Nutritional Value and phytochemicals As with other citrus fruits, orange pulp is an excellent source of vitamin C, providing 64 % of the Daily Value in a 100 g serving ( right table ). Numerous other essential nutrients are present in low amounts ( right table ). Oranges contain diverse phytochemicals, including carotenoids ( beta - carotene, lutein and beta - cryptoxanthin ), flavonoids ( e.g. naringenin ) and numerous volatile organic compounds producing orange aroma, including aldehydes, esters, terpenes, alcohols, and ketones. Orange squeezer to make juice Grading See also : Food grading The United States Department of Agriculture ( USDA ) has established the following grades for Florida oranges, which primarily apply to oranges sold as fresh fruit : US Fancy, US No. 1 Bright, US No. 1, US No. 1 Golden, US No. 1 Bronze, US No. 1 Russet, US No. 2 Bright, US No. 2, US No. 2 Russet, and US No. 3. The general characteristics graded are color ( both hue and uniformity ), firmness, maturity, varietal characteristics, texture, and shape. Fancy, the highest grade, requires the highest grade of color and an absence of blemishes, while the terms Bright, Golden, Bronze, and Russet concern solely discoloration. Grade numbers are determined by the amount of unsightly blemishes on the skin and firmness of the fruit that do not affect consumer safety. The USDA separates blemishes into three categories : General blemishes : ammoniation, buckskin, caked melanose, creasing, decay, scab, split navels, sprayburn, undeveloped segments, unhealed segments, and wormy fruit Injuries to fruit : bruises, green spots, oil spots, rough, wide, or protruding navels, scale, scars, skin breakdown, and thorn scratches Damage caused by dirt or other foreign material, disease, dryness, or mushy condition, hail, insects, riciness or woodiness, and sunburn. The USDA uses a separate grading system for oranges used for juice because appearance and texture are irrelevant in this case. There are only two grades : US Grade AA Juice and US Grade A Juice, which are given to the oranges before processing. Juice grades are determined by three factors : The juiciness of the orange The amount of solids in the juice ( at least 10 % solids are required for the AA grade ) The proportion of anhydric citric acid in fruit solids Still life with oranges on a plate, 1640 Jean - Baptiste Oudry, The Orange Tree, 1740 Cultivation Climate An orange tree covered and damaged from snow, in the Netherlands Orange grove in California Like most citrus plants, oranges do well under moderate temperatures -- between 15.5 and 29 ° C ( 59.9 and 84.2 ° F ) -- and require considerable amounts of sunshine and water. It has been suggested the use of water resources by the citrus industry in the Middle East is a contributing factor to the desiccation of the region. Another significant element in the full development of the fruit is the temperature variation between summer and winter and, between day and night. In cooler climates, oranges can be grown indoors. As oranges are sensitive to frost, there are different methods to prevent frost damage to crops and trees when subfreezing temperatures are expected. A common process is to spray the trees with water so as to cover them with a thin layer of ice that will stay just at the freezing point, insulating them even if air temperatures drop far lower. This is because water continues to lose heat as long as the environment is colder than it is, and so the water turning to ice in the environment can not damage the trees. This practice, however, offers protection only for a very short time. Another procedure is burning fuel oil in smudge pots put between the trees. These devices burn with a great deal of particulate emission, so condensation of water vapour on the particulate soot prevents condensation on plants and raises the air temperature very slightly. Smudge pots were developed for the first time after a disastrous freeze in Southern California in January 1913 destroyed a whole crop. Propagation See also : Fruit tree propagation and Citrus rootstock It is possible to grow orange trees directly from seeds, but they may be infertile or produce fruit that may be different from its parent. For the seed of a commercial orange to grow, it must be kept moist at all times. One approach is placing the seeds between two sheets of damp paper towel until they germinate and then planting them, although many cultivators just set the seeds straight into the soil. Commercially grown orange trees are propagated asexually by grafting a mature cultivar onto a suitable seedling rootstock to ensure the same yield, identical fruit characteristics, and resistance to diseases throughout the years. Propagation involves two stages : first, a rootstock is grown from seed. Then, when it is approximately one year old, the leafy top is cut off and a bud taken from a specific scion variety, is grafted into its bark. The scion is what determines the variety of orange, while the rootstock makes the tree resistant to pests and diseases and adaptable to specific soil and climatic conditions. Thus, rootstocks influence the rate of growth and have an effect on fruit yield and quality. Rootstocks must be compatible with the variety inserted into them because otherwise, the tree may decline, be less productive, or die. Among the several advantages to grafting are that trees mature uniformly and begin to bear fruit earlier than those reproduced by seeds ( 3 to 4 years in contrast with 6 to 7 years ), and that it makes it possible to combine the best attributes of a scion with those of a rootstock. Harvest Canopy - shaking mechanical harvesters are being used increasingly in Florida to harvest oranges. Current canopy shaker machines use a series of six - to - seven - foot - long tines to shake the tree canopy at a relatively constant stroke and frequency. Normally, oranges are picked once they are pale orange. Degreening Oranges must be mature when harvested. In the United States, laws forbid harvesting immature fruit for human consumption in Texas, Arizona, California and Florida. Ripe oranges, however, often have some green or yellow - green color in the skin. Ethylene gas is used to turn green skin to orange. This process is known as `` degreening '', also called `` gassing '', `` sweating '', or `` curing ''. Oranges are non-climacteric fruits and can not post-harvest ripen internally in response to ethylene gas, though they will de-green externally. Storage A stand with oranges at a market in Morocco Commercially, oranges can be stored by refrigeration in controlled - atmosphere chambers for up to 12 weeks after harvest. Storage life ultimately depends on cultivar, maturity, pre-harvest conditions, and handling. In stores and markets, however, oranges should be displayed on non-refrigerated shelves. At home, oranges have a shelf life of about one month. In either case, optimally, they are stored loosely in an open or perforated plastic bag. Pests and diseases See also : List of citrus diseases Cottony cushion scale The first major pest that attacked orange trees in the United States was the cottony cushion scale ( Icerya purchasi ), imported from Australia to California in 1868. Within 20 years, it wiped out the citrus orchards around Los Angeles, and limited orange growth throughout California. In 1888, the USDA sent Alfred Koebele to Australia to study this scale insect in its native habitat. He brought back with him specimens of Novius cardinalis, an Australian ladybird beetle, and within a decade the pest was controlled. Citrus greening disease The citrus greening disease, caused by the bacterium Liberobacter asiaticum, has been the most serious threat to orange production since 2010. It is characterized by streaks of different shades on the leaves, and deformed, poorly colored, unsavory fruit. In areas where the disease is endemic, citrus trees live for only five to eight years and never bear fruit suitable for consumption. In the western hemisphere, the disease was discovered in Florida in 1998, where it has attacked nearly all the trees ever since. It was reported in Brazil by Fundecitrus Brasil in 2004. As from 2009, 0.87 % of the trees in Brazil 's main orange growing areas ( São Paulo and Minas Gerais ) showed symptoms of greening, an increase of 49 % over 2008. The disease is spread primarily by two species of psyllid insects. One of them is the Asian citrus psyllid ( Diaphorina citri Kuwayama ), an efficient vector of the Liberobacter asiaticum. Generalist predators such as the ladybird beetles Curinus coeruleus, Olla v - nigrum, Harmonia axyridis, and Cycloneda sanguinea, and the lacewings Ceraeochrysa spp. and Chrysoperla spp. make significant contribution to the mortality of the Asian citrus psyllid, which results in 80 -- 100 % reduction in psyllid populations. In contrast, parasitism by Tamarixia radiata, a species - specific parasitoid of the Asian citrus psyllid, is variable and generally low in southwest Florida : in 2006, it amounted to a reduction of less than 12 % from May to September and 50 % in November. In 2007, foliar applications of insecticides reduced psyllid populations for a short time, but also suppressed the populations of predatory ladybird beetles. Soil application of aldicarb provided limited control of Asian citrus psyllid, while drenches of imidacloprid to young trees were effective for two months or more. Management of citrus greening disease is difficult and requires an integrated approach that includes use of clean stock, elimination of inoculum via voluntary and regulatory means, use of pesticides to control psyllid vectors in the citrus crop, and biological control of psyllid vectors in non-crop reservoirs. Citrus greening disease is not under completely successful management. Greasy spot Greasy spot, a fungal disease caused by the Mycosphaerella citri, produces leaf spots and premature defoliation, thus reducing the tree 's vigour and yield. Ascospores of M. citri are generated in pseudothecia in decomposing fallen leaves. Once mature, ascospores are ejected and subsequently dispersed by air currents. Production Main article : Citrus production Further information : Orange production in Brazil Production of oranges -- 2014 Country Production ( millions of tonnes ) Brazil 16.9 People 's Republic of China 7.8 India 7.3 United States 6.1 Spain 3.5 Egypt 3.1 World 70.9 Source : FAOSTAT of the United Nations Brazil is the world 's leading orange producer, with an output of 17 million tonnes, followed by China, India, and the United States as the four major producers. Orange groves are located mainly in the state of São Paulo, in the southeastern region of Brazil, and account for approximately 80 % of the national production. As almost 99 % of the fruit is processed for export, 53 % of total global frozen concentrated orange juice production comes from this area and the western part of the state of Minas Gerais. In Brazil, the four predominant orange varieties used for obtaining juice are Hamlin, Pera Rio, Natal, and Valencia. In the United States, groves are located mainly in Florida, California, and Texas. The majority of California 's crop is sold as fresh fruit, whereas Florida 's oranges are destined to juice products. The Indian River area of Florida is known for the high quality of its juice, which often is sold fresh in the United States and frequently blended with juice produced in other regions because Indian River trees yield very sweet oranges, but in relatively small quantities. Production of orange juice between the São Paulo and mid-south Florida areas makes up roughly 85 % of the world market. Brazil exports 99 % of its production, while 90 % of Florida 's production is consumed in the United States. Orange juice is traded internationally in the form of frozen, concentrated orange juice to reduce the volume used so that storage and transportation costs are lower. Juice and other products Oranges, whose flavor may vary from sweet to sour, are commonly peeled and eaten fresh or squeezed for juice. The thick bitter rind is usually discarded, but can be processed into animal feed by desiccation, using pressure and heat. It also is used in certain recipes as a food flavoring or garnish. The outermost layer of the rind can be thinly grated with a zester to produce orange zest. Zest is popular in cooking because it contains oils and has a strong flavor similar to that of the orange pulp. The white part of the rind, including the pith, is a source of pectin and has nearly the same amount of vitamin C as the flesh and other nutrients. Although not as juicy or tasty as the flesh, orange peel is edible and has significant contents of vitamin C, dietary fiber, total polyphenols, carotenoids, limonene and dietary minerals, such as potassium and magnesium. Products made from oranges Jar of marmalade Orange juice is obtained by squeezing the fruit on a special tool ( a juicer or squeezer ) and collecting the juice in a tray underneath. This can be made at home or, on a much larger scale, industrially. Brazil is the largest producer of orange juice in the world, followed by the United States, where it is one of the commodities traded on the New York Board of Trade. Frozen orange juice concentrate is made from freshly squeezed and filtered orange juice. Sweet orange oil is a by - product of the juice industry produced by pressing the peel. It is used for flavoring food and drinks and also in the perfume industry and aromatherapy for its fragrance. Sweet orange oil consists of approximately 90 % D - limonene, a solvent used in various household chemicals, such as wood conditioners for furniture and -- along with other citrus oils -- detergents and hand cleansers. It is an efficient cleaning agent with a pleasant smell, promoted for being environmentally friendly and therefore, preferable to petrochemicals. D - limonene is, however, classified from slightly toxic to humans, to very toxic to marine life in different countries. Marmalade preserves are traditionally made with Seville oranges, which are less sweet. All parts of the fruit are used : the pith and pips ( separated and placed in a muslin bag ) are boiled in a mixture of juice, slivered peel, sliced - up flesh, sugar, and water to extract their pectin, which helps the conserve to set. Orange peel is used by gardeners as a slug repellent. See also Eliza Tibbets ( for the history of orange groves in California, United States ) List of citrus fruits List of culinary fruits References Jump up ^ `` Citrus × sinensis ( L. ) Osbeck ( pro sp. ) ( maxima × reticulata ) sweet orange ''. Plants.USDA.gov. Archived from the original on May 12, 2011. ^ Jump up to : Xu, Q ; Chen, LL ; Ruan, X ; Chen, D ; Zhu, A ; Chen, C ; Bertrand, D ; Jiao, WB ; Hao, BH ; Lyon, MP ; Chen, J ; Gao, S ; Xing, F ; Lan, H ; Chang, JW ; Ge, X ; Lei, Y ; Hu, Q ; Miao, Y ; Wang, L ; Xiao, S ; Biswas, MK ; Zeng, W ; Guo, F ; Cao, H ; Yang, X ; Xu, XW ; Cheng, YJ ; Xu, J ; Liu, JH ; Luo, OJ ; Tang, Z ; Guo, WW ; Kuang, H ; Zhang, HY ; Roose, ML ; Nagarajan, N ; Deng, XX ; Ruan, Y ( Jan 2013 ). `` The draft genome of sweet orange ( Citrus sinensis ) ''. Nature Genetics. 45 : 59 -- 66. doi : 10.1038 / ng. 2472. PMID 23179022. ^ Jump up to : Andrés García Lor ( 2013 ). Organización de la diversidad genética de los cítricos ( PDF ) ( Thesis ). p. 79. Jump up ^ Velasco, R ; Licciardello, C. `` A genealogy of the citrus family ''. Nature Biotechnology. 32 : 640 -- 642. doi : 10.1038 / nbt. 2954. PMID 25004231. ^ Jump up to : Morton, J ( 1987 ). `` Orange, Citrus sinensis. In : Fruits of Warm Climates ''. NewCROP, New Crop Resource Online Program, Center for New Crops & Plant Products, Purdue University. pp. 134 -- 142. Jump up ^ `` Citrus sinensis ''. Germplasm Resources Information Network ( GRIN ). Agricultural Research Service ( ARS ), United States Department of Agriculture ( USDA ). Retrieved 10 December 2017. ^ Jump up to : Organisms. Citrus Genome Database ^ Jump up to : `` Top Production of Oranges, 2014 -- choose `` Production, Crops, World '' in the left margin and picklist ``. United Nations, Food and Agricultural Organization, FAO Statistics. 2014. Retrieved 1 April 2017. Jump up ^ Nicolosi, E. ; Deng, Z.N. ; Gentile, A. ; La Malfa, S. ; Continella, G. ; Tribulato, E. ( 2000 ). `` Citrus phylogeny and genetic origin of important species as investigated by molecular markers ''. TAG Theoretical and Applied Genetics. 100 ( 8 ) : 1155 -- 1166. doi : 10.1007 / s001220051419. Jump up ^ Bailey, H. and Bailey, E. ( 1976 ). Hortus Third. Cornell University MacMillan. N.Y. p. 275. Jump up ^ `` Seed and Fruits ''. esu.edu. ^ Jump up to : Willard Hodgson ( 1967 -- 1989 ) ( 1943 ). `` 4 ''. In Webber, Herbert John ; rev Walter Reuther and Harry W. Lawton. The Citrus Industry, Horticultural Varieties of Citrus. Riverside, California : University of California Division of Agricultural Sciences. Archived from the original on 2012 - 02 - 05. Jump up ^ `` Sweet Orange -- Citrus sinensis ( L. ) Osbeck ( pro. sp. ) -- Overview -- Encyclopedia of Life ''. Encyclopedia of Life. Jump up ^ `` Pith dictionary definition -- pith defined ''. www.yourdictionary.com. Jump up ^ `` Pip dictionary definition -- pip defined ''. www.yourdictionary.com. ^ Jump up to : Kimball, Dan A. ( June 30, 1999 ). `` Citrus processing : a complete guide '' ( 2d ed. ). New York : Springer : 450. ISBN 0 - 8342 - 1258 - 7. Jump up ^ Webber, Herbert John ; Reuther, Walter & Lawton, Harry W. ( 1967 -- 1989 ) ( 1903 ). `` The Citrus Industry ''. Riverside, California : University of California Division of Agricultural Sciences. Archived from the original on 2004 - 06 - 04. ^ Jump up to : Home Fruit Production -- Oranges, Julian W. Sauls, Ph. D., Professor & Extension Horticulturist, Texas Cooperative Extension ( December, 1998 ), aggie-horticulture.tamu.edu Jump up ^ `` Plant Profile for Citrus × aurantium L. ( pro sp. ), http://plants.usda.gov/java/profile?symbol=CIAU8 Jump up ^ RFLP Analysis of the Origin of Citrus Bergamia, Citrus Jambhiri, and Citrus Limonia Jump up ^ Gerald Klingaman. `` Plant of the Week. Hardy Orange or Trifoliate Orange. Latin : Poncirus trifoliat ''. University of Arkansas. Division of Agriculture. Jump up ^ `` Tangerines ( mandarin oranges ) nutrition facts and health benefits ''. nutrition-and-you.com. Jump up ^ `` Definition of SCION ''. www.merriam-webster.com. ^ Jump up to : `` Definition of orange ''. Collins English Dictionary ( collinsdictionary.com ). Jump up ^ `` Definition of orange ''. OED online ( www.oxforddictionaries.com ). Jump up ^ Paterson, Ian ( 2003 ). A Dictionary of Colour : A Lexicon of the Language of Colour ( 1st paperback ed. ). London : Thorogood ( published 2004 ). p. 280. ISBN 1 - 85418 - 375 - 3. OCLC 60411025. Jump up ^ `` orange colour -- orange color, n. ( and adj. ) ''. Oxford English Dictionary. OED. Retrieved 19 April 2011. Jump up ^ Maerz, Aloys John ; Morris, Rea Paul ( 1930 ), A Dictionary of Color, New York : McGraw - Hill, p. 200 ^ Jump up to : `` Multilingual Multiscript Plant Name Database : Sorting Citrus Names ''. University of Melbourne ( www.search.unimelb.edu.au ). Retrieved 11 December 2012. ^ Jump up to : Ostergren, Robert C. & Le Bosse, Mathias ( 2011 ). The Europeans, Second Edition : A Geography of People, Culture, and Environment. Guilford Press. p. 129. ISBN 978 - 1 - 60918 - 140 - 6. Jump up ^ Charles Duff ( 1971 ). Spanish for beginners. HarperCollins. p. 191. ISBN 978 - 0 - 06 - 463271 - 3. Jump up ^ See also List of Puerto Rican slang words and phrases Jump up ^ `` What is the meaning of the Slovak word pomaranč ? ''. WordHippo. Jump up ^ Hoad, T.F. ( 1996 ). `` orange ''. The Concise Oxford Dictionary of English Etymology. HighBeam Research. Retrieved May 19, 2010. Jump up ^ Webber, Herbert John ( 1967 -- 1989 ). Chapter I. History and Development of the Citrus Industry in ORIGIN OF CITRUS, Vol. 1. University of California Jump up ^ Trillo San José, Carmen ( 1 September 2003 ). `` Water and landscape in Granada ''. Universidad de Granada. Jump up ^ Jean - Baptiste Leroux ( 2002 ). The Gardens of Versailles. Thames & Hudson. p. 368. Jump up ^ Nancy Mitford ( 1966 ). The Sun King. Sphere Books Ltd. p. 11. Jump up ^ Sauls, Julian W. ( December 1998 ). `` HOME FRUIT PRODUCTION - ORANGES ''. The Texas A&M University System. Retrieved 30 November 2012. Jump up ^ Mau, Ronald & Kessing, Jayma Martin ( April 2007 ). `` Ceratitis capitata ( Wiedemann ) ''. Knowledge Master, University of Hawaii. Retrieved 5 December 2012. ^ Jump up to : Coit, John Eliot ( 1915 ). Citrus fruits : an account of the citrus fruit industry, with special reference to California requirements and practices and similar conditions. The Macmillan Company. Retrieved 2 October 2011. ^ Jump up to : Material Identification Sheet. Webcapua.com. Retrieved on 2011 - 10 - 02 ( in French ). Jump up ^ Citrus Pages / Sweet oranges. Users.kymp.net. Retrieved on 2011 - 10 - 02. ^ Jump up to : Ferguson, James J. Your Florida Dooryard Citrus Guide -- Appendices, Definitions and Glossary. edis.ifas.ufl.edu Jump up ^ `` The Life of Lue Gim Gong ''. West Volusia Historical Society. Retrieved 5 December 2012. Jump up ^ `` Orange ''. www.hort.purdue.edu. Jump up ^ `` Home ''. Sunkist. ^ Jump up to : Staff of the Citrus Experiment Station, College of Natural and Agricultural Sciences ( 1910 -- 2011 ). `` Sweet Oranges and Their Hybrids ''. Citrus Variety Collection. University of California ( Riverside ). Retrieved January 19, 2011. Jump up ^ `` Commodity Fact Sheet : Citrus Fruits '' ( PDF ). California Foundation for Agriculture in the Classroom. Retrieved 2012 - 03 - 06. Jump up ^ Saunders, William `` Experimental Gardens and Grounds '', in USDA, Yearbook of Agriculture 1897, 180 ff ; USDA, Yearbook of Agriculture 1900, 64. ^ Jump up to : `` UBC Botanical Garden, Botany Photo of the Day ''. ^ Jump up to : Susser, Allen ( 1997 ). The Great Citrus Book : A Guide with Recipes. Ten Speed Press. ISBN 978 - 0 - 89815 - 855 - 7. Jump up ^ Cara Cara navel orange. University of California, Riverside Jump up ^ Portakal Çeşitleri : Seker portakal ( in Turkish ) ^ Jump up to : Tietel, Z ; Plotto, A ; Fallik, E ; Lewinsohn, E ; Porat, R ( 2011 ). `` Taste and aroma of fresh and stored mandarins ''. Journal of the Science of Food and Agriculture. 91 ( 1 ) : 14 -- 23. doi : 10.1002 / jsfa. 4146. PMID 20812381. ^ Jump up to : El Hadi, M.A. ; Zhang, F.J. ; Wu, F.F. ; Zhou, C.H. ; Tao, J ( 2013 ). `` Advances in fruit aroma volatile research ''. Molecules. 18 ( 7 ) : 8200 -- 29. doi : 10.3390 / molecules18078200. PMID 23852166. ^ Jump up to : Bai, J ; Baldwin, E.A. ; McCollum, G ; Plotto, A ; Manthey, J.A. ; Widmer, W.W. ; Luzio, G ; Cameron, R ( 2016 ). `` Changes in Volatile and Non-Volatile Flavor Chemicals of `` Valencia '' Orange Juice over the Harvest Seasons ``. Foods. 5 ( 1 ) : 4. doi : 10.3390 / foods5010004. PMC 5224568. PMID 28231099. ^ Jump up to : Sinclair, Walton B. ; Bartholomew, E.T. & Raamsey, R.C. ( 1945 ). `` Analysis of the organic acids of orange juice '' ( PDF ). Plant Physiology. 20 ( 1 ) : 3 -- 18. doi : 10.1104 / pp. 20.1. 3. PMC 437693. PMID 16653966. Jump up ^ Centers for Disease Control and Prevention ( CDC ) ( July 16, 1999 ). `` Outbreak of Salmonella Serotype Muenchen Infections Associated with Unpasteurized Orange Juice -- United States and Canada, June 1999 ''. Morbidity and Mortality Weekly Report. Centers for Disease Control. 48 ( 27 ) : 582 -- 585. PMID 10428096. Jump up ^ Aschoff JK, Kaufmann S, Kalkan O, Neidhart S, Carle R, Schweiggert RM ( 2015 ). `` In Vitro Bioaccessibility of Carotenoids, Flavonoids, and Vitamin C from Differently Processed Oranges and Orange Juices ( Citrus sinensis ( L. ) Osbeck ) ''. J Agric Food Chem. 63 ( 2 ) : 578 -- 87. doi : 10.1021 / jf505297t. PMID 25539394. CS1 maint : Uses authors parameter ( link ) Jump up ^ Perez - Cacho PR, Rouseff RL ( 2008 ). `` Fresh squeezed orange juice odor : a review ''. Crit Rev Food Sci Nutr. 48 ( 7 ) : 681 -- 95. doi : 10.1080 / 10408390701638902. PMID 18663618. CS1 maint : Uses authors parameter ( link ) ^ Jump up to : United States Standards for Grades of Florida Oranges and Tangelos ( USDA ; February, 1997 ) Jump up ^ `` How Cold Can Water Get ? ''. NEWTON BBS. Argonne National Laboratory. 2002 - 09 - 08. Retrieved 2009 - 04 - 16. Jump up ^ Moore, Frank Ensor ( 1995 ). `` Redlands Astride the Freeway : The Development of Good Automobile Roads ''. Redlands, California : Moore Historical Foundation : 9. ISBN 0 - 914167 - 07 - 3. ^ Jump up to : Lacey, Kevin ( July 2012 ). `` Citrus rootstocks for WA '' ( PDF ). Government of WA. Department of Agriculture and Food. Archived from the original ( PDF ) on 2013 - 11 - 12. Retrieved 30 November 2012. Jump up ^ Dr Price, Martin. `` Citrus Propagation and Rootstocks ''. ultimatecitrus.com. Retrieved 30 November 2012. Jump up ^ Citrus Propagation. Research Program on Citrus Rootstock Breeding and Genetics. ars-grin.gov Jump up ^ Ehsani, R. et al. ( June 2007 ) `` In - situ Measurement of the Actual Detachment Force of Oranges Harvested by a Canopy Shaker Harvesting Machine ''. Abstracts for the 2007 Joint Annual Meeting of the Florida State Horticulture Society. Jump up ^ `` Fresh Citrus Direct ''. freshcitrusdirect.wordpress.com. ^ Jump up to : Wagner, Alfred B. & Sauls, Julian W. `` Harvesting and Pre-pack Handling ''. The Texas A&M University System. Retrieved 29 November 2012. Jump up ^ Arpaia, Mary Lu & Kader, Adel A. `` Orange : Recommendations for Maintaining Postharvest Quality ''. UCDavis Postharvest Technology Center. Jump up ^ Ritenour, M.A. Orange. From The Commercial Storage of Fruits, Vegetables, and Florist and Nursery Stocks. USDA ( 2004 ) ^ Jump up to : `` Home Storage Guide for Fresh Fruits & Vegetables. Canadian Produce Marketing Association '' ( PDF ). cpma.ca. ^ Jump up to : Asian Citrus Psllids ( Sternorryncha : Psyllidae ) and Greening Disease of Citrus, by Susan E. Halbert and Keremane L. Manjunath, Florida Entomologist ( Abstract. September 2004 ) p. 330 FCLA.edu Jump up ^ GAIN Report Number : BR9006, USDA Foreign Agricultural Service ( June, 2009 ) Jump up ^ Qureshi, Jawwad A. and Stansly, Philip A. ( June 2007 ) `` Integrated approaches for managing the Asian citrus psyllid ( Homoptera : Psyllidae ) in Florida ''. Abstracts for the 2007 Joint Annual Meeting of the Florida State Horticulture Society Jump up ^ Mondal, S.N. et al. ( June 2007 ) `` Effect of Water Management and Soil Application of Nitrogen Fertilizers, Petroleum Oils, and Lime on Inoculum Production by Mycosphaerella citri, the Cause of Citrus Greasy Spot ''. Abstracts for the 2007 Joint Annual Meeting of the Florida State Horticulture Society Jump up ^ GAIN Report Number : BR10005, USDA Foreign Agricultural Service ( 6 / 15 / 2010 ) Jump up ^ `` Frozen Concentrated Orange Juice ( FCOJ ) Commodity Market -- Credit and Finance Risk Analysis ''. credfinrisk.com. Archived from the original on 17 March 2012. Jump up ^ `` Oranges : Production Map by State ''. US Department of Agriculture. 1 March 2017. Retrieved 1 April 2017. Jump up ^ `` History of the Indian River Citrus District ''. Indian River Citrus League ( ircitrusleague.org ). Retrieved 27 November 2012. Jump up ^ USDA Foreign Agricultural Service. `` USDA -- U.S and the World Situation : Citrus '' ( PDF ). Archived from the original ( PDF ) on June 4, 2012. Jump up ^ Spreen, Thomas H. Projections of World Production and Consumption of Citrus to 2010. Archived from the original on 2006 - 02 - 07. CS1 maint : BOT : original - url status unknown ( link ) Jump up ^ Barros HR, Ferreira TA, Genovese MI ( 2012 ). `` Antioxidant capacity and mineral content of pulp and peel from commercial cultivars of citrus from Brazil ''. Food Chem. 134 ( 4 ) : 1892 -- 8. doi : 10.1016 / j. foodchem. 2012.03. 090. PMID 23442635. CS1 maint : Uses authors parameter ( link ) Jump up ^ Townsend, Chet. `` The Story of Florida Orange Juice : From the Grove to Your Glass ''. Jump up ^ Kegley SE, Hill BR, Orme S, Choi AH. `` Limonene ''. PAN Pesticide Database. Pesticide Action Network. Jump up ^ `` D - LIMONENE ''. International Programme on Chemical Safety. April 2005. External links Wikiquote has quotations related to : Oranges Look up orange ( fruit ) in Wiktionary, the free dictionary. Media related to Citrus sinensis at Wikimedia Commons Data related to Citrus sinensis at Wikispecies Citrus sinensis List of Chemicals ( Dr. Duke 's Phytochemical and Ethnobotanical Databases ), USDA, Agricultural Research Service. Oranges : Safe Methods to Store, Preserve, and Enjoy. ( 2006 ). University of California Agriculture and Natural Resources. Accessed May 23, 2014. Citrus True species Australian and Papuan wild limes Byeonggyul Citron Clymenia Indian wild orange Kumquat Mandarin Mangshanyegan Papeda Pomelo Yuzu Major hybrids Grapefruit Lemon Lime Orange True and hybrid cultivars Alemow Amanatsu Bergamot orange Bizzaria Bitter orange Blood lime Blood orange Buddha 's hand Cam sành Cara cara navel Cherry orange Citrange Citrumelo Clementine Daidai Dekopon Fairchild tangerine Florentine citron Hassaku orange Hebesu Hyuganatsu Imperial lemon Iyokan Jabara Jaffa orange Kabbad Kabosu Kaffir lime Kakadu lime Kalpi Key lime Khasi papeda Kinnow Kishumikan Kiyomi Komikan Laraha Lumia Mandelo Mandora Melanesian papeda Melogold Meyer lemon Murcott Myrtle - leaved orange tree Ōgonkan Orangelo / Chironja Oroblanco Palestinian sweet lime Persian lime Pixie mandarin Ponderosa lemon Ponkan Rangpur Reikou Rhobs el Arsa Rough lemon Sanboken Satsuma mandarin Setoka Shangjuan Shonan Gold Sudachi Sweet lemon Sweet limetta Tangelo Tangerine Tangor Ugli fruit Valencia orange Variegated pink lemon Winged lime Xã Đoài orange Yuukou mandarin Non-hybrid citrons Balady citron Corsican citron Diamante citron Fingered citron Greek citron Moroccan citron Yemenite citron Non-hybrid mandarin oranges Nanfengmiju Cleopatra mandarin Shīkwāsā Non-hybrid papedas Ichang papeda Citrus halimii or Mountain `` citron '' Non-hybrid pomelos Banpeiyu Dangyuja Australian and Papuan citrus ( Microcitrus, Eromocitrus, and Clymenia subgenera ) Australian outback lime Australian round lime Brown River finger lime Desert lime Mount white lime ( Microcitrus ) New Guinea wild lime Russell River lime Clymenia Kumquat / Fortunella hybrids ( × Citrofortunella ) Calamondin Citrangequat Limequat Orangequat Procimequat Sunquat Yuzuquat Related genera Citrus glauca Poncirus / Trifoliate orange Triphasia Brassii Grandifolia Trifolia Drinks Chūhai Curaçao Grapefruit juice Lemonade Limeade Orange juice Yuja - hwachae Yuja - cha Products Calcium citrate Citric acid Lemonene Limonene Neroli Orange flower water Orange oil Succade Zest Diseases Black spot CTV / Tristeza Exocortis Greening Mal secco Phytophthora citricola Related topics The Citrus Industry Citrus production Citrus rootstock Citrus taxonomy Cold - hardy citrus Hesperidium Japanese citrus List of citrus fruits Mother Orange Tree Orangery University of California Citrus Experiment Station University of California, Riverside Citrus Variety Collection Book Production Commons Retrieved from `` https://en.wikipedia.org/w/index.php?title=Orange_(fruit)&oldid=816885016 '' Categories : Oranges Cocktail garnishes Crops originating from China Fruits originating in Asia Symbols of California Symbols of Florida Tropical agriculture Hidden categories : CS1 maint : Uses authors parameter CS1 maint : BOT : original - url status unknown Wikipedia indefinitely semi-protected pages Wikipedia indefinitely move - protected pages Articles containing potentially dated statements from before 1990 All articles containing potentially dated statements Articles containing potentially dated statements from 2012 Wikipedia articles in need of updating from November 2012 All Wikipedia articles in need of updating All articles with unsourced statements Articles with unsourced statements from April 2017 Articles containing video clips Talk View source Contents About Wikipedia Wikiquote አማርኛ Aragonés অসমীয়া Asturianu Basa Banyumasan भोजपुरी བོད ་ ཡིག Brezhoneg Català Чӑвашла Čeština ChiShona ChiTumbuka Davvisámegiella ދިވެހިބަސް Diné bizaad Eesti Ελληνικά Emiliàn e rumagnòl Эрзянь Español Esperanto Euskara فارسی Føroyskt Français Gaelg Galego ગુજરાતી 한국어 हिन्दी Ido Ирон Íslenska עברית Basa Jawa Kapampangan Қазақша Kiswahili Kongo Kreyòl ayisyen Кыргызча Кырык мары Ladino ລາວ Latviešu Lëtzebuergesch Lietuvių Lingála La. lojban. Luganda മലയാളം मराठी Монгол Nāhuatl Nedersaksies Napulitano Nordfriisk Norsk Occitan Oʻzbekcha / ўзбекча ਪੰਜਾਬੀ پښتو Polski Qaraqalpaqsha Reo tahiti Русский Gagana Samoa संस्कृतम् Scots Sesotho sa Leboa Sicilianu Simple English Slovenčina Slovenščina Ślůnski Soomaaliga کوردی Српски / srpski Srpskohrvatski / српскохрватски Suomi Svenska தமிழ் ไทย ᏣᎳᎩ Українська اردو ئۇيغۇرچە / Uyghurche Vahcuengh Tiếng Việt Võro Winaray ייִדיש 粵語 中文 Edit links This page was last edited on 24 December 2017, at 11 : 04. Text is available under the Creative Commons Attribution - ShareAlike License ; additional terms may apply. By using this site, you agree to the Terms of Use and Privacy Policy. Wikipedia ® is a registered trademark of the Wikimedia Foundation, Inc., a non-profit organization. About Wikipedia

Question: where do most of the worlds oranges come from
Answer: Brazil