Cochineal Female (left) and male (right) Cochineals. Scientific classification Domain: Eukaryota Kingdom: Animalia Phylum: Arthropoda Class: Insecta Order: Homoptera Superfamily: Coccoidea Family: Dactylopiidae Genus: Dactylopius Species: D. coccus Binomial name Dactylopius coccus
Coccus cacti Linnaeus, 1758
Pseudococcus cacti Burmeister, 1839
The cochineal (/kɒtʃɨˈniːl/ koch-i-neel or /ˈkɒtʃɨniːl/ koch-i-neel; Dactylopius coccus) is a scale insect in the suborder Sternorrhyncha, from which the crimson-coloured dye carmine is derived. A primarily sessile parasite native to tropical and subtropical South America and Mexico, this insect lives on cacti from the genus Opuntia, feeding on plant moisture and nutrients.
The insect produces carminic acid that deters predation by other insects. Carminic acid, which occurs as 17-24% of the weight of the dry insects, can be extracted from the insect's body and eggs and mixed with aluminum or calcium salts to make carmine dye (also known as cochineal). Carmine is today primarily used as a food colouring and for cosmetics.
The carmine dye was used in Central America in the 15th century for colouring fabrics and became an important export good during the colonial period. After synthetic pigments and dyes such as alizarin were invented in the late 19th century, natural-dye production gradually diminished. Health fears over artificial food additives, however, have renewed the popularity of cochineal dyes, and the increased demand has made cultivation of the insect profitable again, with Peru being the largest exporter. Some towns in the state of Oaxaca (in Mexico) are still working in hand-made textiles.
There are other species in the genus Dactylopius that can be used to produce cochineal extract, but they are extremely difficult to distinguish from D. coccus, even for expert taxonomists, and the latter scientific name (and the vernacular "cochineal insect") is therefore commonly used when one is actually referring to other biological species. The primary biological distinctions between species are minor differences in host plant preferences, in addition to very different geographic distributions.
Cochineal dye was used by the Aztec and Maya peoples of Central and North America. Eleven cities conquered by Moctezuma in the 15th century paid a yearly tribute of 2000 decorated cotton blankets and 40 bags of cochineal dye each. During the colonial period the production of cochineal (grana fina) grew rapidly. Produced almost exclusively in Oaxaca by indigenous producers, cochineal became Mexico's second most valued export after silver. Soon after the Spanish conquest of the Aztec Empire it began to be exported to Spain, and by the seventeenth century was a commodity traded as far away as India. The dyestuff was consumed throughout Europe and was so highly prized that its price was regularly quoted on the London and Amsterdam Commodity Exchanges. In 1777 the French botanist Nicolas-Joseph Thiéry de Menonville, presenting himself as a botanizing physician, smuggled the insects and pads of the Opuntia cactus to Saint Domingue. This particular collection failed to thrive and ultimately died out, leaving the Mexican monopoly intact. After the Mexican War of Independence in 1810–1821, the Mexican monopoly on cochineal came to an end. Large scale production of cochineal emerged, especially in Guatemala and the Canary Islands; it was also cultivated in Spain and North Africa.
The demand for cochineal fell sharply with the appearance on the market of alizarin crimson and many other artificial dyes discovered in Europe in the middle of the 19th century, causing a significant financial shock in Spain as a major industry almost ceased to exist. The delicate manual labour required for the breeding of the insect could not compete with the modern methods of the new industry, and even less so with the lowering of production costs. The "tuna blood" dye (from the Mexican name for the Opuntia fruit) stopped being used and trade in cochineal almost totally disappeared in the course of the 20th century. The breeding of the cochineal insect has been done mainly for the purposes of maintaining the tradition rather than to satisfy any sort of demand.
It has become commercially valuable again, although most consumers are unaware that the phrases "cochineal extract", "carmine", "crimson lake", "natural red 4", "C.I. 75470", "E120", or even "natural colouring" refer to a dye that is derived from an insect. One reason for its popularity is that many commercial synthetic red dyes were found to be carcinogenic. The dye can, however, induce an anaphylactic shock reaction in rare cases.
The carmine of antiquity (Old World kermes, NR3) also contains carminic acid, and was extracted from a similar insect, Kermes vermilio, that lives on scarlet oaks native to the Near East and the European side of the Mediterranean basin. Kermes carmine was used as a dye and a laked pigment in ancient Egypt, Greece and the near East and is one of the oldest organic pigments; cochineal carmine was used by the Aztecs and was first imported to Europe in the 1530s from Spanish conquests in America. Recipes for artists' use of carmine appear in many early painting and alchemical handbooks throughout the Middle Ages; the laking process for both pigments was improved in the 19th century. Carmine lakes appear frequently in European oil paintings from François Boucher to Raoul Dufy; in watercolors it has extremely poor lightfastness and has not been widely used since alizarin crimson became available in the late 19th century.
Deep brownish red (Indian lake or lac (NR25)) is made from the blood red secretion of female scale insects (Laccifer lacca) that feed on the twigs of various trees native to India, including Butea frondosa and Ficus religiosa. The twigs become encrusted with a reddish, bumpy and glossy resin which is processed to extract the red colorant; lighter grades of the resin are used as the basis for shellac. Used as a silk dye in India and imported to Spain since the early 13th century. Chemically lac is closely related to carmine, and is equally fugitive.
Cochineal insects are soft-bodied, flat, oval-shaped scale insects. The females, wingless and about 5 millimetres (0.20 in) long, cluster on cactus pads. They penetrate the cactus with their beak-like mouthparts and feed on its juices, remaining immobile. After mating, the fertilized female increases in size and gives birth to tiny nymphs. The nymphs secrete a waxy white substance over their bodies for protection from water loss and excessive sun. This substance makes the cochineal insect appear white or grey from the outside, though the body of the insect and its nymphs produces the red pigment, which makes the insides of the insect look dark purple. Adult males can be distinguished from females in that males have wings, and are much smaller in size than females.
It is in the nymph stage (also called the crawler stage) that the cochineal disperses. The juveniles move to a feeding spot and produce long wax filaments. Later they move to the edge of the cactus pad where the wind catches the wax filaments and carries the cochineals to a new host. These individuals establish feeding sites on the new host and produce a new generation of cochineals. Male nymphs feed on the cactus until they reach sexual maturity; when they mature they cannot feed at all and live only long enough to fertilize the eggs. They are therefore seldom observed. In addition, females typically outnumber males, due to environmental factors.
Dactylopius coccus is native to tropical and subtropical South America and Mexico, where their host cacti grow natively. They have been introduced to Spain, the Canary Islands, Algiers, and Australia along with their host cacti; and Eritrea, where their host cacti were already abundant. There are 200 species of Opuntia cacti, and while it is possible to cultivate cochineal on almost all of them, the best to use is Opuntia ficus-indica. All of the host plants of cochineal colonies were identified as species of Opuntia including Opuntia amyclaea, O. atropes, O. cantabrigiensis, O. brasilienis, O. ficus-indica, O. fuliginosa, O. jaliscana, O. leucotricha, O. lindheimeri, O. microdasys, O. megacantha, O. pilifera, O. robusta, O. sarca, O. schikendantzii, O. stricta, O. streptacantha, and O. tomentosa. Feeding cochineals can damage the cacti, sometimes killing their host. Cochineals other than D. coccus will feed on many of the same Opuntia species, and it is likely that the wide range of hosts reported for the former species is because of the difficulty in distinguishing it from these other, less common species.
A nopal cactus farm for the production of cochineal is traditionally known as a nopalry. There are two methods of farming cochineal: traditional and controlled. Cochineals are farmed in the traditional method by planting infected cactus pads or infecting existing cacti with cochineals and harvesting the insects by hand. The controlled method uses small baskets called Zapotec nests placed on host cacti. The baskets contain clean, fertile females that leave the nests and settle on the cactus to await insemination by the males. In both cases the cochineals have to be protected from predators, cold, and rain. The complete cycle lasts 3 months during which the cacti are kept at a constant temperature of 27 °C (81 °F). Once the cochineals have finished the cycle, the new cochineals are ready to begin the cycle again or to be dried for dye production.
To produce dye from cochineals, the insects are collected when they are approximately ninety days old. Harvesting the insects is labour-intensive, as they must be individually knocked, brushed, or picked from the cacti and placed into bags. The insects are gathered by small groups of collectors who sell them to local processors or exporters.
Several natural enemies can reduce the population of the insect on its cacti hosts. Of all the predators, insects seem to be the most important group. Insects and their larvae such as pyralid moths (order Lepidoptera), which destroy the cactus, and predators such as lady bugs (Coleoptera), various Diptera (such as Syrphidae and Chamaemyiidae), lacewings (Neuroptera), and ants (Hymenoptera) have been identified, as well as numerous parasitic wasps. Many birds, human-commensal rodents (especially rats) and reptiles also prey on cochineal insects. In regions dependent on cochineal production, pest control measures have to be taken seriously. For small-scale cultivation, manual methods of control have proved to be the safest and most effective. For large-scale cultivation, advanced pest control methods have to be developed, including alternative bioinsecticides or traps with pheromones.
Farming in Australia
The host cactus Opuntia (also known as "Prickly pear") was first brought to Australia in an attempt to start a cochineal dye industry in 1788, when Captain Arthur Phillip collected a number of cochineal-infested plants from Brazil on his way to establish the first European settlement at Botany Bay (part of which is now Sydney, New South Wales). At that time, Spain and Portugal had a worldwide monopoly (via their New World colonial sources) on the cochineal dye industry, and the British desired a source under their own control, as the dye was important to their clothing and garment industries (it was used to colour the British soldiers' red coats, for example). The attempt was a failure in two ways: the Brazilian cochineal insects soon died off, but the cactus thrived, eventually overrunning about 100,000 square miles (260,000 km2) of eastern Australia. The cacti were eventually brought under control in the 1920s by the deliberate introduction of a South American moth, Cactoblastis cactorum, whose larvae fed on the cactus.
A deep crimson dye is extracted from the female cochineal insects. Cochineal is used to produce scarlet, orange and other red tints. The colouring comes from carminic acid. Cochineal extract's natural carminic-acid content is usually 19–22%. The insects are killed by immersion in hot water (after which they are dried) or by exposure to sunlight, steam, or the heat of an oven. Each method produces a different colour that results in the varied appearance of commercial cochineal. The insects must be dried to about 30 percent of their original body weight before they can be stored without decaying. It takes about 70,000 insects to make one pound of cochineal dye.
There are two principal forms of cochineal dye: cochineal extract is a colouring made from the raw dried and pulverised bodies of insects, and carmine is a more purified colouring made from the cochineal. To prepare carmine, the powdered insect bodies are boiled in ammonia or a sodium carbonate solution, the insoluble matter is removed by filtering, and alum is added to the clear salt solution of carminic acid to precipitate the red aluminium salt. Purity of colour is ensured by the absence of iron. Stannous chloride, citric acid, borax, or gelatin may be added to regulate the formation of the precipitate. For shades of purple, lime is added to the alum.
As of 2005, Peru produced 200 tonnes of cochineal dye per year and the Canary Islands produced 20 tonnes per year. Chile and Mexico have also recently begun to export cochineal. France is believed to be the world's largest importer of cochineal; Japan and Italy also import the insect. Much of these imports are processed and reexported to other developed economies. As of 2005, the market price of cochineal was between 50 and 80 USD per kilogram, while synthetic raw food dyes are available at prices as low as 10–20 USD per kilogram.
Traditionally cochineal was used for colouring fabrics. During the colonial period, with the introduction of sheep to Latin America, the use of cochineal increased, as it provided the most intense colour and it set more firmly on woolen garments than on clothes made of materials of pre-Hispanic origin such as cotton, agave fibers and yucca fibers. In general, cochineal is more successful on protein-based animal fibres (including silk) than plant-based material. Once the European market had discovered the qualities of this product, their demand for it increased dramatically, and by the start of the seventeenth century it was traded internationally. Carmine became strong competition for other colourants such as madder root, kermes, Polish cochineal, brazilwood, and Tyrian purple, as they were used for dyeing the clothes of kings, nobles and the clergy. For the past several centuries it was the most important insect dye used in the production of hand-woven oriental rugs, almost completely displacing lac. It was also used for painting, handicrafts, and tapestries. Cochineal-coloured wool and cotton are still important materials for Mexican folk art and crafts.
Today, it is used as a fabric and cosmetics dye and as a natural food colouring. In artist's paints, it has been replaced by synthetic reds and is largely unavailable for purchase due to poor lightfastness. When used as a food additive the dye must be included on packaging labels. Sometimes carmine is labelled as E120. A small number of people have been found to have allergies to carmine, ranging from mild cases of hives to atrial fibrillation and anaphylactic shock, with 32 cases documented to date. Carmine has been found to cause asthma in some people. Cochineal is one of the colours that the Hyperactive Children's Support Group recommends be eliminated from the diet of hyperactive children. Natural carmine dye used in food and cosmetics can render the product unacceptable to vegetarian or vegan consumers, many Muslims consider carmine-containing food forbidden (haraam) because the dye is extracted from insects, and Jews also avoid food containing this additive (even though it is not treif and some authorities allow its use because the insect is dried and reduced to powder).
Cochineal is one of the few water-soluble colorants that resist degradation with time. It is one of the most light- and heat-stable and oxidation-resistant of all the natural organic colorants and is even more stable than many synthetic food colours. The water-soluble form is used in alcoholic drinks with calcium carmine; the insoluble form is used in a wide variety of products. Together with ammonium carmine they can be found in meat, sausages, processed poultry products (meat products cannot be coloured in the United States unless they are labeled as such), surimi, marinades, alcoholic drinks, bakery products and toppings, cookies, desserts, icings, pie fillings, jams, preserves, gelatin desserts, juice beverages, varieties of cheddar cheese and other dairy products, sauces, and sweets. The average human consumes one to two drops of carminic acid each year with food.
A U.S. Food and Drug Administration rule effective January 5, 2011 requires all foods and cosmetics containing cochineal to declare it on their ingredient labels.
Carmine is considered safe enough for use in eye cosmetics. A significant proportion of the insoluble carmine pigment produced is used in the cosmetics industry for hair- and skin-care products, lipsticks, face powders, rouges, and blushes. A bright red dye and the stain carmine used in microbiology is often made from the carmine extract, too. The pharmaceutical industry uses cochineal to colour pills and ointments.
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Cochineal — Coch i*neal (k[o^]ch [i^]*n[=e]l; 277), [Sp. cochinilla, dim. from L. coccineus, coccinus, scarlet, fr. coccum the kermes berry, G. ko kkos berry, especially the kermes insect, used to dye scarlet, as the cochineal was formerly supposed to be the … The Collaborative International Dictionary of English
cochineal — 1580s, from Fr. cochenille (16c.), perhaps from It. cocciniglia or directly from Mod.L. coccinum scarlet robe, coccineus scarlet colored, from coccum scarlet, lit. grain, berry. Coccum is cognate with Gk. kokkos, which had the same senses. Some… … Etymology dictionary
cochineal — [käch′ə nēl΄, käch΄ə nēl′] n. [Fr cochenille, prob. < L coccinus, scarlet colored < coccum, a berry, scarlet: see COCCUS] a red dye made from the dried bodies of female cochineal insects: used, esp. formerly, in coloring foods, cosmetics,… … English World dictionary
cochineal — ► NOUN ▪ a scarlet dye used for colouring food, made from the crushed dried bodies of a female scale insect. ORIGIN French cochenille or Spanish cochinilla, from Latin coccinus scarlet … English terms dictionary
cochineal — /koch euh neel , koh cheuh , koch euh neel , koh cheuh /, n. a red dye prepared from the dried bodies of the females of the cochineal insect, Dactylopius coccus, which lives on cactuses of Mexico, Central America, and other warm regions. [1575… … Universalium
cochineal — noun Etymology: Middle French & Spanish; Middle French cochenille, from Old Spanish cochinilla cochineal insect Date: 1582 1. a red dye consisting of the dried bodies of female cochineal insects 2. cochineal insect … New Collegiate Dictionary
cochineal —  Cochineal ‘red dye’ comes via French cochenille from Old Spanish cochinilla, a term applied both to the dye and to the small insect related to the mealybugs, from whose dried body it is made. It is generally thought to be a derivative of… … The Hutchinson dictionary of word origins
cochineal — [ˌkɒtʃɪ ni:l, kɒtʃɪni:l] noun 1》 a scarlet dye used for colouring food, made from the crushed dried bodies of a female scale insect. 2》 (cochineal insect) the scale insect that is used for cochineal, native to Mexico and formerly widely… … English new terms dictionary
cochineal —  Cochineal ‘red dye’ comes via French cochenille from Old Spanish cochinilla, a term applied both to the dye and to the small insect related to the mealybugs, from whose dried body it is made. It is generally thought to be a derivative of… … Word origins
cochineal — n. [Gr. kokkinos, scarlet] (ARTHROPODA: Insecta) A crimson dye commercially extracted from the dried bodies of the homopterous insect Dactylopius coccus (cochineal scale) cultivated in South America, Mexico and the Canary Islands; see quinone… … Dictionary of invertebrate zoology