''Ocimum gratissimum'', also known as clove basil, African basil, and in Hawaii as wild basil,
* Holy basil
''Ocimum tenuiflorum'', commonly known as holy basil, ''tulsi'' or ''tulasi'', is an aromatic perennial plant in the family Lamiaceae. It is native to the Indian subcontinent and widespread as a cultivated plant throughout the Southeast Asian ...
(''Ocimum tenuiflorum
''Ocimum tenuiflorum'', commonly known as holy basil, ''tulsi'' or ''tulasi'', is an aromatic perennial plant in the family Lamiaceae. It is native to the Indian subcontinent and widespread as a cultivated plant throughout the Southeast Asian ...
'', formerly known as ''O. sanctum'')
Cultivation
Growing conditions
Basil is sensitive to cold, with best growth in hot, dry conditions. It behaves as an annual if there is any chance of a frost. However, due to its popularity, basil is cultivated in many countries around the world. Production areas include countries in the Mediterranean area, those in the temperate zone
In geography, the temperate climates of Earth occur in the middle latitudes (23.5° to 66.5° N/S of Equator), which span between the tropics and the polar regions of Earth. These zones generally have wider temperature ranges throughout t ...
, and others in subtropical
The subtropical zones or subtropics are geographical zone, geographical and Köppen climate classification, climate zones to the Northern Hemisphere, north and Southern Hemisphere, south of the tropics. Geographically part of the Geographical z ...
climates.
In Northern Europe, Canada, the northern states of the U.S., and the South Island of New Zealand, basil grows best if sown under glass in a peat
Peat (), also known as turf (), is an accumulation of partially decayed vegetation or organic matter. It is unique to natural areas called peatlands, bogs, mires, moors, or muskegs. The peatland ecosystem covers and is the most efficien ...
pot, then planted out in late spring/early summer (when there is little chance of a frost); however, it can also thrive when planted outside in these climates. Additionally, it may be sown in soil once chance of frost is past. It fares best in well-drained soil with direct exposure to the sun.
Although basil grows best outdoors, it can be grown indoors in a pot and, like most herbs, will do best on a sun-facing windowsill, kept away from extremely cold drafts. A greenhouse
A greenhouse (also called a glasshouse, or, if with sufficient heating, a hothouse) is a structure with walls and roof made chiefly of Transparent ceramics, transparent material, such as glass, in which plants requiring regulated climatic condit ...
or row cover is ideal if available. It can, however, even be grown in a basement under fluorescent lights. Supplemental lighting produces greater biomass and phenol
Phenol (also called carbolic acid) is an aromatic organic compound with the molecular formula . It is a white crystalline solid that is volatile. The molecule consists of a phenyl group () bonded to a hydroxy group (). Mildly acidic, it req ...
production, with red + blue specifically increasing growth and flower bud production. UV-B
Ultraviolet (UV) is a form of electromagnetic radiation with wavelength from 10 nm (with a corresponding frequency around 30 PHz) to 400 nm (750 THz), shorter than that of visible light, but longer than X-rays. UV radiation i ...
increases the volatiles
Volatiles are the group of chemical elements and chemical compounds that can be readily vaporized. In contrast with volatiles, elements and compounds that are not readily vaporized are known as refractory substances.
On planet Earth, the term ' ...
in ''O. basilicum'' essential oil
An essential oil is a concentrated hydrophobic liquid containing volatile (easily evaporated at normal temperatures) chemical compounds from plants. Essential oils are also known as volatile oils, ethereal oils, aetheroleum, or simply as the o ...
, which has not been reproducible in other plants, and so may be unique to the genus or even to this species.
Basil plants require regular watering, but not as much attention as is needed in other climates. If its leaves have wilted from lack of water, it will recover if watered thoroughly and placed in a sunny location. Yellow leaves towards the bottom of the plant are an indication that the plant has been stressed; usually this means that it needs less water, or less or more fertilizer. Basil can be propagated reliably from cuttings with the stems of short cuttings suspended in water for two weeks or until roots develop.
Pruning, flowering, and seeding
Once a stem produces flowers, foliage production stops on that stem, the stem becomes woody, and essential oil production declines. To prevent this, a basil-grower may pinch off any flower stems before they are fully mature. Because only the blooming stem is so affected, some stems can be pinched for leaf production, while others are left to bloom for decoration or seeds. Picking the leaves off the plant helps promote growth, largely because the plant responds by converting pairs of leaflets next to the topmost leaves into new stems.
Once the plant is allowed to flower, it may produce seed pods containing small black seeds, which can be saved and planted the following year. If allowed to go to seed, a basil plant will grow back the next year.
Diseases
Basil suffers from several plant pathogens that can ruin the crop and reduce yield. Fusarium wilt
Fusarium wilt is a common vascular wilt fungal disease, exhibiting symptoms similar to Verticillium wilt. This disease has been investigated extensively since the early years of this century. The pathogen that causes Fusarium wilt is ''Fusarium o ...
is a soil-borne fungal disease that will quickly kill younger basil plants. Seedling
A seedling is a young sporophyte developing out of a plant embryo from a seed. Seedling development starts with germination of the seed. A typical young seedling consists of three main parts: the radicle (embryonic root), the hypocotyl (embry ...
s may be killed by '' Pythium'' damping off. A common foliar
A leaf ( : leaves) is any of the principal appendages of a vascular plant stem, usually borne laterally aboveground and specialized for photosynthesis. Leaves are collectively called foliage, as in "autumn foliage", while the leaves, ste ...
disease of basil is gray mold
''Botrytis cinerea'' is a necrotrophic fungus that affects many plant species, although its most notable hosts may be wine grapes. In viticulture, it is commonly known as "botrytis bunch rot"; in horticulture, it is usually called "grey mould" or ...
caused by ''Botrytis cinerea
''Botrytis cinerea'' is a necrotrophic fungus that affects many plant species, although its most notable hosts may be wine grapes. In viticulture, it is commonly known as "botrytis bunch rot"; in horticulture, it is usually called "grey mould" or ...
''; it can cause infections post-harvest and is capable of killing the entire plant. Black spot can be seen on basil foliage and is caused by the fungi
A fungus ( : fungi or funguses) is any member of the group of eukaryotic organisms that includes microorganisms such as yeasts and molds, as well as the more familiar mushrooms. These organisms are classified as a kingdom, separately from ...
genus
Genus ( plural genera ) is a taxonomic rank used in the biological classification of extant taxon, living and fossil organisms as well as Virus classification#ICTV classification, viruses. In the hierarchy of biological classification, genus com ...
''Colletotrichum
''Colletotrichum'' (sexual stage: ''Glomerella'') is a genus of fungi that are symbionts to plants as endophytes (living within the plant) or phytopathogens. Many of the species in this genus are plant pathogens, but some species may have a mutu ...
''. Downy mildew caused by ''Peronospora belbahrii'' is a significant disease, as first reported in Italy in 2004. It was reported in the U.S. in 2007 and 2008.
Non-pathogenic bacteria found on basil include ''Novosphingobium
''Novosphingobium'' is a genus of Gram-negative bacteria that includes ''N. taihuense'', which can degrade aromatic compounds such as phenol, aniline, nitrobenzene and phenanthrene. The species ''N. aromativorans'', which was first found in Ul ...
'' species.
Uses
Culinary
Basil is most commonly used fresh in recipes. In general, it is added last, as cooking quickly destroys the flavor. The fresh herb can be kept for a short time in plastic bags in the refrigerator, or for a longer period in the freezer, after being blanched quickly in boiling water.
Leaves and flowers
The most commonly used Mediterranean basil cultivars are "Genovese", "Purple Ruffles", "Mammoth", "Cinnamon", "Lemon", "Globe", and " African Blue". Basil is one of the main ingredients in pesto, an Italian sauce with olive oil
Olive oil is a liquid fat obtained from olives (the fruit of ''Olea europaea''; family Oleaceae), a traditional tree crop of the Mediterranean Basin, produced by pressing whole olives and extracting the oil. It is commonly used in cooking: f ...
and basil as its primary ingredients. Many national cuisines use fresh or dried basils in soups and other foods, such as to thicken soups. Basil is commonly steeped in cream or milk to create flavor in ice cream or chocolate truffles.
Lemon basil has a strong lemony smell and flavor due to the presence of citral. It is widely used in Indonesia
Indonesia, officially the Republic of Indonesia, is a country in Southeast Asia and Oceania between the Indian and Pacific oceans. It consists of over 17,000 islands, including Sumatra, Java, Sulawesi, and parts of Borneo and New Guine ...
, where it is called and served raw as an accompaniment to meat or fish.
Seeds
When soaked in water, the seeds of several basil varieties become gelatinous, and are used in Asian drinks and desserts such as the Indian
Indian or Indians may refer to:
Peoples South Asia
* Indian people, people of Indian nationality, or people who have an Indian ancestor
** Non-resident Indian, a citizen of India who has temporarily emigrated to another country
* South Asia ...
''faluda
A ''falooda'' is a Mughlai Indian version of a cold dessert made with noodles. It has origins in the Persian dish '' faloodeh'', variants of which are found across West, Central, and South Asia. Traditionally it is made by mixing rose syrup, ...
'', the Iranian
Iranian may refer to:
* Iran, a sovereign state
* Iranian peoples, the speakers of the Iranian languages. The term Iranic peoples is also used for this term to distinguish the pan ethnic term from Iranian, used for the people of Iran
* Iranian lan ...
, or . In Kashmir, the Ramadan
, type = islam
, longtype = Religious
, image = Ramadan montage.jpg
, caption=From top, left to right: A crescent moon over Sarıçam, Turkey, marking the beginning of the Islamic month of Ramadan. Ramadan Quran reading in Bandar Torkaman, Iran. ...
fast is often broken with ''babre beole'', a sharbat made with basil seeds.
Folk medicine
Basil is used in folk medicine practices, such as those of Ayurveda
Ayurveda () is an alternative medicine system with historical roots in the Indian subcontinent. The theory and practice of Ayurveda is pseudoscientific. Ayurveda is heavily practiced in India and Nepal, where around 80% of the population repo ...
or traditional Chinese medicine
Traditional Chinese medicine (TCM) is an alternative medical practice drawn from traditional medicine in China. It has been described as "fraught with pseudoscience", with the majority of its treatments having no logical mechanism of action ...
.
Toxicity to pests and pathogens
Insecticide and insect repellent
Studies of the essential oil have shown insecticidal and insect-repelling properties, including potential toxicity to mosquitos. The essential oil is found by Huignard et al. 2008 to inhibit electrical activity by decreasing action potential
An action potential occurs when the membrane potential of a specific cell location rapidly rises and falls. This depolarization then causes adjacent locations to similarly depolarize. Action potentials occur in several types of animal cells, ...
amplitude, by shortening the post hyperpolarization phase, and reducing the action frequency of action potentials. In Huignard's opinion this is due to the linalool
Linalool () refers to two enantiomers of a naturally occurring terpene alcohol found in many flowers and spice plants. Linalool has multiple commercial applications, the majority of which are based on its pleasant scent (floral, with a touch of ...
and estagole, the amplitude reduction due to linalool, and the phase shortening due to both.
''Callosobruchus maculatus
''Callosobruchus maculatus'' is a species of beetles known commonly as the cowpea weevil or cowpea seed beetle.Tran, B. M. D. and P. F. Credland. (1995)Consequences of inbreeding for the cowpea seed beetle, ''Callosobruchus maculatus'' (F.) (Cole ...
'', a pest which affects cowpea
The cowpea (''Vigna unguiculata'') is an annual herbaceous legume from the genus ''Vigna''. Its tolerance for sandy soil and low rainfall have made it an important crop in the semiarid regions across Africa and Asia. It requires very few input ...
, is repelled by the essential oil. The essential oil mixed with kaolin
Kaolinite ( ) is a clay mineral, with the chemical composition Al2 Si2 O5( OH)4. It is an important industrial mineral. It is a layered silicate mineral, with one tetrahedral sheet of silica () linked through oxygen atoms to one octahedral ...
is both an adulticide
Insecticides are substances used to kill insects. They include ovicides and larvicides used against insect eggs and larvae, respectively. Insecticides are used in agriculture, medicine, industry and by consumers. Insecticides are claimed to ...
and an ovicide, effective for three months in against ''C. maculatus'' in cowpea. The thrips
Thrips ( order Thysanoptera) are minute (mostly long or less), slender insects with fringed wings and unique asymmetrical mouthparts. Different thrips species feed mostly on plants by puncturing and sucking up the contents, although a few are ...
'''' and '' Thrips tabaci'' are repelled by ''O. basilicum'', making this useful as an insect repellent in other crops. The pests ''Sitophilus oryzae
''Sitophilus'' is a genus of weevils in the tribe Litosomini. Some species are familiar as pests of stored grain, nut, or seed. Notable pest species include the rice weevil (''S. oryzae''), wheat weevil (''S. granarius''), and maize weevil (''S. ...
'', '' Stegobium paniceum'', ''Tribolium castaneum
The red flour beetle (''Tribolium castaneum'') is a species of beetle in the family Tenebrionidae, the darkling beetles. It is a worldwide pest of stored products, particularly food grains, and a model organism for ethological and food safety ...
'', and ''Bruchus chinensis
''Bruchus'' is a genus of beetles in the leaf beetle family, leaf beetle, Chrysomelidae. They are distributed mainly in the Palearctic realm, Palearctic,Kergoat, G. J., et al. (2007)Defining the limits of taxonomic conservatism in host–plant use ...
'' are evaluated by Deshpande et al. 1974 and '77.
Nematicide
The essential oil is found by Malik et al. 1987 and Sangwan et al. 1990 to be nematicidal
A nematicide is a type of chemical pesticide used to kill plant- parasitic nematodes. Nematicides have tended to be broad-spectrum toxicants possessing high volatility or other properties promoting migration through the soil. Aldicarb (Temik), a c ...
against ''Tylenchulus semipenetrans
''Tylenchulus semipenetrans'' (Citrus nematode, Citrus root nematode) is a species of plant pathogenic nematodes and the causal agent of slow decline of citrus. ''T. semipenetrans'' is found in most citrus production areas and diverse soil textu ...
'', '' Meloidogyne javanica'', ''Anguina tritici
''Anguina tritici'' (ear-cockle nematode, seed-gall nematode, seed and leaf gall nematode, wheat gall nematode, wheat seed gall nematode, wheat seed-gall nematode, wheat seed and leaf gall nematode) is a plant pathogenic nematode.
History and ...
'', and '' Heterodera cajani''.
Bacterial and fungal inhibition
The essential oil of the leaf and/or terminal shoot
In botany, a bud is an undeveloped or embryonic shoot and normally occurs in the axil of a leaf or at the tip of a stem. Once formed, a bud may remain for some time in a dormant condition, or it may form a shoot immediately. Buds may be speci ...
is effective against a large number of bacterial species including ''Lactiplantibacillus plantarum
''Lactiplantibacillus plantarum'' (formerly ''Lactobacillus arabinosus'' and ''Lactobacillus plantarum'') is a widespread member of the genus ''Lactiplantibacillus'' and commonly found in many fermented food products as well as anaerobic plant ma ...
'' and '' Pseudomonas'' spp. The essential oil of leaf and/or terminal shoot
In botany, a bud is an undeveloped or embryonic shoot and normally occurs in the axil of a leaf or at the tip of a stem. Once formed, a bud may remain for some time in a dormant condition, or it may form a shoot immediately. Buds may be speci ...
is also effective against a large number of fungal species including '' Aspergillus'' spp., '' Candida'' spp., '' Mucor'' spp., and ''Geotrichum candidum
''Geotrichum candidum'' is a fungus which is a member of the human microbiome, notably associated with skin, sputum, and faeces where it occurs in 25–30% of specimens. It is common in soil and has been isolated from soil collected around the w ...
''.
Culture
There are many rituals and beliefs associated with basil. The ancient Egyptians and ancient Greeks believed basil would open the gates of heaven for a person passing on. Jewish folklore suggests it adds strength while fasting. However, Herbalist Nicholas Culpeper
Nicholas Culpeper (18 October 1616 – 10 January 1654) was an English botanist, herbalist, physician and astrologer.Patrick Curry: "Culpeper, Nicholas (1616–1654)", ''Oxford Dictionary of National Biography'' (Oxford, UK: OUP, 2004) His boo ...
saw basil as a plant of dread and suspicion.
In Portugal
Portugal, officially the Portuguese Republic ( pt, República Portuguesa, links=yes ), is a country whose mainland is located on the Iberian Peninsula of Southwestern Europe, and whose territory also includes the Atlantic archipelagos of ...
, dwarf bush basil is traditionally presented in a pot, together with a poem and a paper carnation, to a sweetheart, on the religious holidays of John the Baptist
John the Baptist or , , or , ;Wetterau, Bruce. ''World history''. New York: Henry Holt and Company. 1994. syc, ܝܘܿܚܲܢܵܢ ܡܲܥܡܕ݂ܵܢܵܐ, Yoḥanān Maʿmḏānā; he, יוחנן המטביל, Yohanān HaMatbil; la, Ioannes Bapti ...
(see ) and Saint Anthony of Padua
Anthony of Padua ( it, Antonio di Padova) or Anthony of Lisbon ( pt, António/Antônio de Lisboa; born Fernando Martins de Bulhões; 15 August 1195 – 13 June 1231) was a Portuguese people, Portuguese Catholic Church, Catholic priesthood (Cath ...
. In Giovanni Boccaccio
Giovanni Boccaccio (, , ; 16 June 1313 – 21 December 1375) was an Italian writer, poet, correspondent of Petrarch, and an important Renaissance humanist. Born in the town of Certaldo, he became so well known as a writer that he was somet ...
's 14th century ''Decameron'', the fifth story of the narrative's fourth day involves a pot of basil as a central plot device. This famous story inspired John Keats
John Keats (31 October 1795 – 23 February 1821) was an English poet of the second generation of Romantic poets, with Lord Byron and Percy Bysshe Shelley. His poems had been in publication for less than four years when he died of tuberculo ...
to write his 1814 poem "Isabella, or the Pot of Basil
''Isabella, or the Pot of Basil'' (1818) is a narrative poem by John Keats adapted from a story in Boccaccio's ''Decameron'' (IV, 5). It tells the tale of a young woman whose family intend to marry her to "some high noble and his olive trees", b ...
", which was in turn the inspiration for two paintings of the Pre-Raphaelite Brotherhood
The Pre-Raphaelite Brotherhood (later known as the Pre-Raphaelites) was a group of English painters, poets, and art critics, founded in 1848 by William Holman Hunt, John Everett Millais, Dante Gabriel Rossetti, William Michael Rossetti, James ...
: John Everett Millais
Sir John Everett Millais, 1st Baronet, ( , ; 8 June 1829 – 13 August 1896) was an English painter and illustrator who was one of the founders of the Pre-Raphaelite Brotherhood. He was a child prodigy who, aged eleven, became the youngest ...
's ''Isabella'' in 1849 and in 1868 the ''Isabella and the Pot of Basil
''Isabella and the Pot of Basil'' is a painting completed in 1868 by William Holman Hunt depicting a scene from John Keats's poem ''Isabella, or the Pot of Basil''. It depicts the heroine Isabella caressing the basil pot in which she had buried ...
'' by William Holman Hunt
William Holman Hunt (2 April 1827 – 7 September 1910) was an English painter and one of the founders of the Pre-Raphaelite Brotherhood. His paintings were notable for their great attention to detail, vivid colour, and elaborate symbolism. ...
.
Basil has religious significance in the Greek Orthodox Church
The term Greek Orthodox Church (Greek: Ἑλληνορθόδοξη Ἐκκλησία, ''Ellinorthódoxi Ekklisía'', ) has two meanings. The broader meaning designates "the entire body of Orthodox (Chalcedonian) Christianity, sometimes also call ...
, where it is used to sprinkle holy water. The Bulgarian Orthodox Church
The Bulgarian Orthodox Church ( bg, Българска православна църква, translit=Balgarska pravoslavna tsarkva), legally the Patriarchate of Bulgaria ( bg, Българска патриаршия, links=no, translit=Balgarsk ...
, Serbian Orthodox Church
The Serbian Orthodox Church ( sr-Cyrl, Српска православна црква, Srpska pravoslavna crkva) is one of the autocephalous (ecclesiastically independent) Eastern Orthodox Christian denomination, Christian churches.
The majori ...
, Macedonian Orthodox Church
The Macedonian Orthodox Church – Archdiocese of Ohrid (MOC-AO; mk, Македонска православна црква – Охридска архиепископија), or simply the Macedonian Orthodox Church (MOC) or the Archdiocese o ...
and Romanian Orthodox Church use basil ( bg, босилек, ; sr, босиљак, ; mk, босилек, ) to prepare holy water and pots of basil are often placed below church altars. Some Greek Orthodox Christians even avoid eating it due to its association with the legend of the Elevation of the Holy Cross.
See also
* Basileus
''Basileus'' ( el, ) is a Greek term and title that has signified various types of monarchs in history. In the English-speaking world it is perhaps most widely understood to mean "monarch", referring to either a "king" or an "emperor" and al ...
* List of basil cultivars
References
External links
Basil: Knowing and Growing from the New York Botanical Garden
{{sister bar, auto=yes, commons=Ocimum basilicum, wikt=basil
Articles containing video clips
Flora of Asia
Flora of New Guinea
Herbs
Indian spices
Insect repellents
Mediterranean cuisine
Medicinal plants of Asia
Ocimum
Taxa named by Carl Linnaeus