Banana Plant Plantain Variety

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Banana Plant Plantain Variety

Banana Plantain Variety in a 3 Gallon Container. Used in cooking, very versatile. Can be used to make Plantain Chips which are a healthier alternative to potatoe chips. Great plant for decoration add tropical look to any garden.

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SKU: BanaPlantain
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  • Overview

    Banana Plantain Variety in a 3 Gallon Container. Used in cooking, very versatile. Can be used to make Plantain Chips which are a healthier alternative to potatoe chips. Great plant for decoration add tropical look to any garden.

    Description
    Origin and Distribution
    Climate
    Soil
    Propagation
    Culture
    Harvesting
    Yield
    Handling and Packing
    Controlled Ripening and Storage
    Pests
    Diseases
    Food Uses
    Other Uses
    Medicinal Uses
    Folklore


    The word "banana" is a general term embracing a number of species or hybrids in the genus Musa of the family Musaceae. Some species such as M. Basjoo Sieb. & Zucc. of Japan and M. ornata Roxb., native from Pakistan to Burma, are grown only as ornamental plants or for fiber. M. textilis Nee of the Philippines is grown only for its fiber, prized for strong ropes and also for tissue-thin tea bags. The so-called Abyssinian banana, Ensete ventricosum Cheesman, formerly E. edule Horan, Musa ensete Gmel., is cultivated in Ethiopia for fiber and for the staple foods derived from the young shoot, the base of the stem, and the corm. Most edible-fruited bananas, usually seedless, belong to the species M. acuminata Colla (M. cavendishii Lamb. ex Paxt., M. chinensis Sweet, M. nana Auth. NOT Lour., M. zebrina Van Houtee ex Planch.), or to the hybrid M. X paradisiaca L. (M. X sapientum L.; M. acumianta X M. balbisiana Colla).


    Description

    The banana plant, often erroneously referred to as a "tree", is a large herb, with succulent, very juicy stem (properly "pseudostem") which is a cylinder of leaf-petiole sheaths, reaching a height of 20 to 25 ft (6-7.5 m) and arising from a fleshy rhizome or corm. Suckers spring up around the main plant forming a clump or "stool'', the eldest sucker replacing the main plant when it fruits and dies, and this process of succession continues indefinitely. Tender, smooth, oblong or elliptic, fleshy-stalked leaves, numbering 4 or 5 to 15, are arranged spirally. They unfurl, as the plant grows, at the rate of one per week in warm weather, and extend upward and outward, becoming as much as 9 ft (2.75 m) long and 2 ft (60 cm) wide. They may be entirely green, green with maroon splotches, or green on the upperside and red purple beneath. The inflorescence, a transformed growing point, is a terminal spike shooting out from the heart in the tip of the stem. At first, it is a large, long-oval, tapering, purple-clad bud. As it opens, it is seen that the slim, nectar-rich, tubular, toothed, white flowers are clustered in whorled double rows along the floral stalk, each cluster covered by a thick, waxy, hoodlike bract, purple outside, deep-red within. Normally, the bract will lift from the first hand in 3 to 10 days. If the plant is weak, opening may not occur until 10 or 15 days. Female flowers occupy the lower 5 to 15 rows; above them may be some rows of hermaphrodite or neuter flowers; male flowers are borne in the upper rows. In some types the inflorescence remains erect but generally, shortly after opening, it begins to bend downward. In about one day after the opening of the flower clusters, the male flowers and their bracts are shed, leaving most of the upper stalk naked except at the very tip where there usually remains an unopened bud containing the last-formed of the male flowers. However, there are some mutants such as 'Dwarf Cavendish' with persistent male flowers and bracts which wither and remain, filling the space between the fruits and the terminal bud. As the young fruits develop from the female flowers, they look like slender green fingers. The bracts are soon shed and the fully grown fruits in each cluster become a "hand" of bananas, and the stalk droops with the weight until the bunch is upside down. The number of "hands" varies with the species and variety. The fruit (technically a "berry") turns from deep-green to yellow or red, or, in some forms, green-and white-striped, and may range from 2 1/2 to 12 in (6.4-30 cm) in length and 3/4 to 2 in (1.9-5 cm) in width, and from oblong, cylindrical and blunt to pronouncedly 3-angled, somewhat curved and hornlike. The flesh, ivory-white to yellow or salmon-yellow, may be firm, astringent, even gummy with latex, when unripe, turning tender and slippery, or soft and mellow or rather dry and mealy or starchy when ripe. The flavor may be mild and sweet or subacid with a distinct apple tone. Wild types may be nearly filled with black, hard, rounded or angled seeds 1/8 to 5/8 in (3-16 mm) wide and have scant flesh. The common cultivated types are generally seedless with just minute vestiges of ovules visible as brown specks in the slightly hollow or faintly pithy center, especially when the fruit is overripe. Occasionally, cross-pollination by wild types will result in a number of seeds in a normally seedless variety such as 'Gros Michel', but never in the Cavendish type.
     
    Origin and Distribution

     Edible bananas originated in the Indo-Malaysian region reaching to northern Australia. They were known only by hearsay in the Mediterranean region in the 3rd Century B.C., and are believed to have been first carried to Europe in the 10th Century A.D. Early in the 16th Century, Portuguese mariners transported the plant from the West African coast to South America. The types found in cultivation in the Pacific have been traced to eastern Indonesia from where they spread to the Marquesas and by stages to Hawaii. Bananas and plantains are today grown in every humid tropical region and constitute the 4th largest fruit crop of the world, following the grape, citrus fruits and the apple. World production is estimated to be 28 million tons—65% from Latin America, 27 % from Southeast Asia, and 7 % from Africa. One-fifth of the crop is exported to Europe, Canada, the United States and Japan as fresh fruit. India is the leading banana producer in Asia. The crop from 400,000 acres (161,878 ha) is entirely for domestic consumption. Indonesia produces over 2 million tons annually, the Philippines about 1/2 million tons, exporting mostly to Japan. Taiwan raises over 1/2 million tons for export. Tropical Africa (principally the Ivory Coast and Somalia) grows nearly 9 million tons of bananas each year and exports large quantities to Europe. Brazil is the leading banana grower in South America—about 3 million tons per year, mostly locally consumed, while Colombia and Ecuador are the leading exporters. Venezuela's crop in 1980 reached 983,000 tons. Large scale commercial production for export to North America is concentrated in Honduras (where banana fields may cover 60 sq mi) and Panama, and, to a lesser extent, Costa Rica. In the West Indies, the Windward Islands of Martinique and Guadeloupe are the main growers and for many years have regularly exported to Europe. Green bananas are the basic food of the people of Western Samoa and large quantities are exported. In Ghana, the plantain is a staple food but up to the late 1960's the crop was grown only in home gardens or as a shade for cacao. When the cacao trees declined, solid plantings of plantain were established in their place and in newly cleared forest land where the richness of organic matter greatly promotes growth. By 1977, Ghana was harvesting 2,204,000 tons (2,000,000 MT) annually. The plantain is the most important starchy food of Puerto Rico and is third in monetary value among agricultural crops, being valued at $30,000,000 annually. While improved methods of culture have been adopted in recent years and production has been increased by 15% in 1980, it was still necessary to import 1,328 tons (1,207 MT) to meet local demand. Annual per capita consumption is said to be 65 lbs (29.5 kg). In the past, most of the plantains in Puerto Rico were grown on humid mountainsides. High prices have induced some farmers to develop plantations on level irrigated land formerly devoted to sugarcane. In tropical zones of Colombia, plantains are not only an important part of the human diet but the fruits and the plants furnish indispensable feed for domestic animals as well. The total plantain area is about 1,037,820 acres (420,000 ha) with a yield of 5,500 lbs per acre (5,500) kg/ha). Mexico grows about 1/6 as much, 35% under irrigation, and the crop is valued at $1,335 US per acre ($3,300 US/ha). Venezuela has somewhat less of a crop 517,000 tons from 146,000 acres (59,000 ha) in 1980—and the Dominican Republic is fourth in order with about 114,600 acres (46,200 ha). Bananas and plantains are casually grown in some home gardens in southern Florida. There are a few small commercial plantations furnishing local markets.

    Climate

    The edible bananas are restricted to tropical or neartropical regions, roughly the area between latitudes 30°N and 30°S. Within this band, there are varied climates with different lengths of dry season and different degrees and patterns of precipitation. A suitable banana climate is a mean temperature of 80°F (26.67°C) and mean rainfall of 4 in (10 cm) per month. There should not be more than 3 months of dry season. Cool weather and prolonged drought retard growth. Banana plants produce only one leaf per month in winter, 4 per month in summer. If low temperatures occur just at flowering time, the bud may not be able to emerge from the stem. If fruits have already formed, maturity may be delayed several months or completely suspended. If only the leaves are destroyed, the fruits will be exposed to sunburn. Smudging, by burning dry trash covered with green clippings to create smoke, can raise the temperature 2 to 4 degrees. Flooding the field in advance of a cold snap will keep the ground warm if the chill weather is brief. In Australia, bananas are planted on sunny hill sides at elevations of 200 to 1,000 ft (60 to 300 m) to avoid the cold air that settles at lower levels. Brief frosts kill the plants to the ground but do not destroy the corm. 'Dwarf Cavendish' and the 'Red' banana are particularly sensitive to cold, whereas the dwarf cultivar 'Walha', or 'Kullen', of India is successful up to 4,000 ft (1,220 m) in the outer range of the Western Ghats. 'Vella vazhai' is extensively cultivated in the Lower Pulneys between 3,200 and 5,500 ft (975 and 1,616 m). A cooking banana, 'Plankel', survives winters in home gardens in northern India. In South Africa, the main banana-producing area is along the southeast coast at 3,000 ft (915 m) above sea level with summer rainfall of 35 to 45 in (90-115 cm). The major part of the crop in East Africa is grown between 4,000 and 5,000 ft (1,220 and 1,524 m) and the total range extends from sea-level to 7,500 ft (2,286 m). Wind is detrimental to banana plants. Light winds shred the leaves, interfering with metabolism; stronger winds may twist and distort the crown. Winds to 30 mph break the petioles; winds to 40 mph will topple a pseudostem that is supporting the weight of a heavy bunch unless the stem is propped, and may cause root damage in non fruiting plants that are not blown down; winds of 60 mph or over will uproot entire plantations, especially when the soil is saturated by rain. Windbreaks are often planted around banana fields to provide some protection from cold and wind. Cyclones and hurricanes are devastating and the latter were the main reason for the shift of large scale banana production from the West Indies to Central America, Colombia and Ecuador. Hail results from powerful convection currents in the tropics, especially in the spring, and does much damage to bananas.

    Soil

    The banana plant will grow and fruit under very poor conditions but will not flourish and be economically productive without deep, well-drained soil—loam, rocky sand, marl, red laterite, volcanic ash, sandy clay, even heavy clay—but not fine sand which holds water. Over head irrigation is said to improve the filth of heavy clay and has made possible the use of clay soils that would never have been considered for banana culture in the past. Alluvial soils of river valleys are ideal for banana growing. Bananas prefer an acid soil but if the pH is below 5.0 lime should be applied the second year. Low pH makes bananas more susceptible to Panama disease. Where waterlogging is likely, bananas and plantains are grown on raised beds. Low, perennially wet soils require draining and dry soils require irrigation.
     
    Propagation

    Banana seeds are employed for propagation only in breeding programs. Corms are customarily used for planting and Mexican studies with 'Giant Cavendish' have shown that those over 17.5 lbs (8 kg) in weight come into bearing early and, in the first year, the bunches are longer, heavier, with more hands than those produced from smaller corms. From the second year on, the advantage disappears. Most growers prefer "bits" 2- to 4-lb (0.9-1.8 kg) sections of the corm. When corms are scarce, smaller sections—1 to 2 lbs (454-908 g) have been utilized and early fertilization applied to compensate for the smaller size. But in Queensland it is specified that "bits" of 'Dwarf Cavendish' shall not be less than 4 x 3 x 3 in (10 x 7.5 x 7.5 cm) and "bits" of 'Lady Finger' and other tall cultivars shall be not less than 5 x 5 x 3 1/2 in ( 12.5 x 12.5 x 9 cm). The corm has a number of buds, or "eyes", which develop into new shoots. The two upper buds are the youngest and have a pinkish tint. These develop rapidly and become vigorous plants. To obtain the "bits", a selected, healthy banana plant, at least 7 months old but prior to fruiting, is uprooted and cut off about 4 to 5 in (10-12.5 cm) above the corm. The outer layer of leaf bases is peeled off to expose the buds, leaving just a little to protect the buds during handling and transport. The corm is split between the 2 upper buds and trimmed with square sides, removing the lower, inferior buds and any parts affected by pests or disease, usually indicated by discoloration. Then the "bits" are fumigated by immersing for 20 minutes in hot water at about 130°F (54.44°C) or in a commercial nematicide solution. Sometimes it is advisable to apply a fungicide to prevent spoilage. They should then be placed in a sanitary place (away from all diseased trash) in the shade for 48 hrs before planting. Inasmuch as "bits" are not often available in quantity, the second choice is transplantation of suckers. These should not be too young nor too old. The sucker first emerges as a conical shoot which opens and releases leaves that are mostly midribs with only vestiges of blade. These juvenile leaves are called "sword", "spear", or "arrow", leaves. Just before the sucker produces wide leaves resembling those of the mature plant but smaller, it has sufficient corm development to be transplanted. Sometimes suckers from old, deteriorating corms have broad leaves from the outset. These are called "water" suckers, are insubstantial, with very little vigor, and are not desirable propagating material. "Maiden" suckers that have passed the "sword"-leaved stage and have developed broad leaves must be large to be acceptably productive. In banana trials at West Bengal, India, suckers 3 to 4 months old with well-developed rhizomes proved to be the best yielders. In comparison, small, medium, or large "sword" suckers develop thicker stems, and give much higher yields of marketable fruits per land parcel. "Bits' grow slowly at first, but in 2 years' time they catch up to plants grown from suckers or "butts" and are much more economical. "Butts" (entire corms, or rhizomes, of mature plants), called "bull heads" in the Windward Islands, are best used to fill in vacancies in a plantation. For quick production, some farmers will use "butts" with several "sword" suckers attached. Very young suckers, called "peepers", are utilized only for establishing nurseries. Instead of waiting for normal sucker development, multiplication has been artificially stimulated in the field by removing the soil and outer leaf sheaths covering the upper buds of the corm, packing soil around them and harvesting them when they have reached the "sword' sucker stage. A greenhouse technique involves cleaning and injuring a corm to induce callus formation from which many new plants will develop. As many as 180 plantlets have been derived from one corm in this manner. Diseases are often spread by vegetative propagation of bananas, and this fact has stimulated efforts to create disease-free planting material on a large scale by means of tissue culture. Some commercial banana cultivars have been cultured in Hawaii. A million 'Giant Cavendish' banana plants were produced by meristem culture in Taiwan in 1983. In the field, these laboratory plantlets showed 95% survival, grew faster than suckers in the first 5 months, had bigger stems and more healthy leaves. Rapid multiplication of 'Philippine Lacatan' and 'Grand Naine' bananas, and the Sigatoka-resistant 'Saba' and 'Pelipita' plantains by shoot-tip culture has been achieved by workers at State University of New York.
     
    Culture

    On level land where the soil is compact, deep ploughing is needed to improve aeration and water filtration, whereas on a sloping terrain minimum tillage is advised as well as contouring of rows to minimize erosion. Planting is best done at the end of the dry season and beginning of the wet season for adequate initial moisture and to avoid waterlogging of the young plants. Puerto Rico, because of its favorable climate, is able to make monthly plantings of plantains the year around in order to produce a continuous supply for processing factories. However, some consideration has been given to manipulation of planting dates to avoid a summer surplus (June-September) caused by March and May plantings and to take advantage of higher prices in winter and spring (February to April). To achieve this, it is suggested that plantings be made only in the first or second weeks of January, July, September, November and December. Generally, the banana requires 10 to 12 months from planting to harvest. Summer plantings of plantains in Puerto Rico take 14 to 16 months; winter plantings 17 to 19. In regions where there may be periods of low temperatures in winter, planting time is chosen to allow flowering and fruiting before predictable cold periods. Spacing varies with the ultimate size of the cultivar, the fertility of the soil, and other factors. Close planting protects plantations exposed to high winds, but results in fewer suckers, hinders disease control, and has been found to be profitable for only the first year. In subsequent years, fruits are shorter, the flesh is softer and bunches ripen prematurely. The standard practice in Puerto Rico is 500 plants of 'Maricongo' plantain per acre (1,235 plants/ha). Increasing to 800 plants/acre (1,976/ha) has increased yield by 4 tons, but elevating density to 1,300 plants/acre (3,212 plants/ha) has not shown any further increase. In Surinam, most of the plantains are grown at a density of 809 to 1,012 plants per acre (2,000-2,500/ha), but density may range from 243 to 1,780 plants per acre (600-4,400/ha). The higher the number of plants in the field, the larger the volume of fertilizer that must be applied. The crop suffers severely from root competition, for the roots of a fully grown banana plant may extend outward 18 ft (5.5 m). The higher the altitude, the lower the density must be because solar radiation is reduced. Too much space between plants allows excessive evaporation from uncovered soil and increases the weed problem. Growers must determine the most economical balance between sufficient light for good yields and efficient land managemeet. Spacing distances for 'Dwarf Cavendish' range from 10 x 6 ft (3 x 1.8 m) to 15 x 12 ft (4.5 x 3.6 m). A spacing of 12 ft (3.6 m) between rows and 8 ft (2.4 m) between plants allows 450 plants per acre (1,112 plants/ha). Studies conducted with the so called 'Lacatan' ('Pisang masak hijau') over a 3-year period in Jamaica, demonstrated the optimum density to be 680 plants per acre (2,680/ha). At closer spacings, yield increased but profits declined. Hexagonal spacing gives the maximum number of plants per area. Double- and triple-row plantings provide alleys for mechanical operations and harvesting. Planting holes should be at least 18 in (45 cm) wide and 15 in (38 cm) deep, but may be as much as 3 ft (0.91 m) wide and 2 ft (0.6 m) deep for extra wind resistance. They should be enriched in advance of planting. On hillsides, suckers are set with the cut surface facing downhill; the bud or "eye" of a "bit" must point uphill; so that the "follower" sucker will emerge on the uphill side where the soil is deepest. A surface cover of about 4 in (10 cm) of soil is trampled down firmly. Weed control is essential. Geese have been installed as weeders because they do not eat the banana plants. However, they consume mostly grass and fail to eliminate certain broad-leaved weeds which still require cleaning out. Certain herbicides, including Diuron and Ametryne, have been approved for banana fields. They are applied immediately after planting but great care must be taken to minimize adverse effects on the crop. Ametryne has been shown to be relatively safe for the plants and it has a short life in the soil. The most persistent weed is Cyperus rotundus L. (nutgrass, yellow nutgrass, purple nutsedge, coqui or coyolillo) which decreases yields and competes with the crop for nitrogen. In some plantations, a mulch of dry banana leaves is maintained to discourage weeds. Some growers resort to live groundcovers such as Glycine javanica L. (Rhodesian kodzu), Commelina spp., or Zebrina pendula Schnizl. or other creepers, but these tend to climb the banana stems and become a nuisance. Sometimes short-term crops are interplanted in young banana fields, for example, maize, eggplant, peppers, tomatoes, okra, sweetpotato, pineapple or upland rice. A space of at least 3 ft (0.91 m) must be kept clear around each banana plant. However, there are banana authorities who are opposed to interplanting. Bananas and plantains are heavy feeders. It has been calculated that a harvest of 5 tons of fruit from an acre leaves the soil depleted by 22 lbs (10 kg) nitrogen, 4 lbs (1.8 kg) phosphorus, 55 lbs (25 kg) potash and 11 oz (312 kg) calcium. In general, it can be said that banana plants have high nitrogen and phosphorus requirements and a fertilizer formula of 8:10:8 NPK is usually suitable and normally 1 to 1 1/2 tons/acre (1 1 1/2 MT/ha) may be adequate. One-third of the fertilizer is worked into each planting site when most of the plants appear above ground, one third in a circle about 1 ft (30 cm) out from each plant 2 months later, and one-third at double the distance 2 months after that. Supplementary feedings will depend on signs of deficiencies (often determined by leaf analyses) as the plantation develops. Fertilization needs vary with the soil. In Puerto Rico, most plantains are grown on humid Oxisols and Ultisols in the interior. These soils are well drained but relatively infertile and highly acid, the pH being about 4.8. On such soils, potassium uptake may be too high and N and Mg deficiencies occur. But experts have shown that these soils respond to good fertilization practices and can be very productive. As an example, 224 lbs N per acre (224 kg/ha) applied in circular bands 1.5 ft (0.46 m) from the base of the pseudostem gives a significantly higher yield than broadcast N, and there is good response to Mg applied at time of planting and again 7 months later. In the humid mountain regions of Puerto Rico, 250 to 325 lbs N per acre (250 325 kg/ha), 125 to 163 lbs phosphorus per acre (125 163 kg/ha), and 500 to 650 lbs potassium per acre (500 650 kg/ha) are recommended for plantains. On lowland sandy clay, phosphorus and magnesium applications appear ineffective. Applications of N at the rate of 168 to 282 lbs/acre (168-282 kg/ha) increase size and number of fruits harvested, but higher rates of N decrease yield because of the number of plants that bend over halfway or are stunted or fail to flower. Applications of 1,121 1bs N per acre (1,121 kg/ha) reduce production by 46%. Potassium at the rate of 405 to 420 lbs/acre (405 420 kg/ha) has the effect of increasing weight and number of fruits. However, there appear to be factors, possibly soil magnesium and calcium, which inhibit the uptake of potassium. One study showed that it took one year for heavy applications of K to reach down to a depth of 8 in (20 cm) where most of the roots were found in a banana plantation on clay loam. One benefit of added potassium is that it makes bananas more buoyant. In cool, dry seasons in Honduras, the fruit tissue is abnormally dense and there is a high rate of "sinkers" when hands are floated through a washing tank. Such fruits have been found deficient in potassium and increased potassium in the fertilizer has reduced the problem. Irrigation by costly overhead sprinkler systems is standard practice in large scale banana culture in Central America. Without such equipment, irrigation basins may be necessary throughout the field and they should be able to hold at least 3 in (7.5 cm) of water. During the first 2 months, the plants should be irrigated every 7 to 10 days; older plants need irrigation only every 3 to 4 weeks in dry seasons. On heavy soils, too frequent irrigations decrease yields. For maximum root development, the water table must be between 14 and 19 in (36 48 cm) below ground level. To preserve the original density, the plants are pruned; that is, only the most deep seated sucker and one or more of its offshoots ("peepers") are permitted to exist beside each parent plant to serve as replacements and maintain a steady succession. All other suckers are killed to prevent competition with the pseudostem and its "followers", and a bunch of fruits will be ready for harvest every 6 to 8 months. Various methods of de-suckering have been employed: 1) wrenching by hand; 2) cutting at soil level with a banana knife; 3) cutting at soil level and filling the base with kerosene; 4) cutting at soil level and killing the under ground terminal bud by thrusting in and twisting a gouging tool. As the older leaves wither and droop, they must be removed because they interfere with spraying, they shade the suckers, cause blemishes on the fruits, harbor disease, insects and other creatures, and constitute a fire hazard. Bearing bananas require propping. This has been done with simple wooden or bamboo poles, forked poles, or two stakes fastened together to form an "X" at the top, a system much less harmful to the pseudostem. Or the plant may be tied back to pickets driven into the ground, to prevent falling with the weight of the bunch. Fig. 10: Immature banana bunch ("stem") in protective plastic cover; Hacienda Secadal, Ecuador. Various types of covering—dry banana leaves, canvas, drill cloth, sisal sacks, or burlap or so-called "Hessian' bags (made of jute), have been put over banana bunches intended for export, especially to enhance fruit development in winter and avoid blemishes. In 1955, Queensland led the trend toward adoption of tubular poly vinylchloride (PVC), then the cheaper blue polyethylene covers after trials produced record bunches. At first, the transparent covering caused sunburn on the first two hands and it was found necessary to protect these with newspaper before pulling on the plastic sleeve. The use of plastic covers became standard practice not only in Australia but in Africa, India and the American tropics. In 1963, Queensland growers were turning to covers made of High Wet Strength (formaldehyde-treated) kraft paper which was already in use for garbage bags. These bags were easily stapled at the top, prevented sunburn, resisted adverse weather, and were reusable for at least another season. Some growers still prefer the burlap. It is cautioned that the cover should not be put on until the bracts have lifted from the fruits (about 21 days after "shooting") so that the young fingers will be firm enough to resist the friction of the cover. If bunches are composed of more than 7 hands, debudding, or "de-belling" that is, removal of the terminal male bud (which keeps on extending and growing) will result in somewhat fuller bananas, thus increasing bunch weight. The cut should be made several inches below the last hand so that the rotting tip of the severed stalk will not affect the fruits.
     
    Harvesting

     Banana bunches are harvested with a curved knife when the fruits are fully developed, that is, 75% mature, the angles are becoming less prominent and the fruits on the upper hands are changing to light green; and the flower remnants (styles) are easily rubbed off the tips. Generally, this stage is reached 75 to 80 days after the opening of the first hand. Cutters must leave attached to the bunch about 6 to 9 in (15-18 cm) of stalk to serve as a handle for carrying. With tall cultivars, the pseudostem must be slashed partway through to cause it to bend and harvesters pull on the leaves to bring the bunch within reach. They must work in pairs to hold and remove the bunch without damaging it. In the early 1960's a "banana bender" was invented in Queensland—an 8-ft pole with a steel rod mounted at the top and shaped with a downward pointing upper hook and an upward-pointing lower hook, the first to pull the pseudostem down after nicking and the second to support the bent pseudostem so that the bunch can be cut at a height of about 4 1/2 ft ( 1.35 m). Formerly, entire bunches were transported to shipping points and exported with considerable loss from inevitable damage. Improved handling methods have greatly reduced bunch injuries. In modern plantations, the bunches are first rested on the padded shoulder of a harvester and then are hung on special racks or on cables operated by pulleys by means of which they can be easily conveyed to roads and by vehicle to nearby packing sheds. Where fields have been located in remote areas lacking adequate highways, transport out has been accomplished by hovercraft flying along riverbeds. In Costa Rica, when rains have prevented truck transport to railway terminals, bananas have been successfully carried in slings suspended from helicopters. Exposure to even moderate light after harvest initiates the ripening process. Therefore the fruits should be protected from light as much as possible until they reach the packing shed. In India, studies have been made to determine the most feasible disposition of a plant from which a bunch has been harvested. It is normal for it to die and it may be left standing for 3 to 4 months to dehydrate before removal, or the top half may be removed right after harest by means of a tool called a "mattock" (a combined axe and hoe); or the pseudostem may be cut at ground level, split open, and the tender core taken away for culinary purposes. Results indicated that the first two practices have equal effect on production, but the complete felling and removal of the pseudostem lowered the yield of the "follower" significantly. In Jamaica and elsewhere it is considered best to chop and spread as organic matter the felled pseudostem and other plant residue. This returns to the soil 404 lbs N, 101 lbs P and 1, 513 lbs K from an acre of bananas (404 kg, 101 kg and 1,513 kg, respectively, from a hectare). The stump should be covered with hard-packed soil to discourage entrance of pests. Banana plantations, if managed manually, may survive for 25 years or far longer. The commercial life of a banana "stool" is about 5 or 6 years. From the 4th year on, productivity declines and the field becomes too irregular for mechanical operations. Sanitary regulations require that the old plantings be eradicated. In the past, this has been done by digging out the plants with the mattock, or bringing in cattle to graze on them. In recent years, the old plants and the suckers that arise from the old corms are injected with herbicide until all are thoroughly killed and the field is then cleared. Where bananas or plantains are raised on cleared forest land without sophisticated maintenance practices, they become thoroughly infested with nematodes by the end of the third year and the regrowth of underbrush has begun to take over the field, so it is simply abandoned.

    Yield

     It is clear that many factors determine the annual yield from a banana or plantain plantation: soil and agronomic practices, the cultivar planted, spacing, the type of propagating material and the management of sucker succession. The 'Gros Michel' banana has yielded 3 to 7 tons per acre (3 to 7 MT/ha) in Central America. A 'Giant Cavendish' bunch may weigh 110 lbs (50 kg) and have a total of 363 marketable fruits. A well-filled bunch of "Dwarf Cavendish' will have no more than 150 to 200 fruits. Sword suckers of plantains have yielded 54,984 fruits per acre (135,866 fruits /ha); water suckers, 49,021 fruits per acre (121,132 fruits/ha). With heavy fertilization, the 'Maricongo' plantain in Puerto Rico, planted at the rate of 725 per acre has produced 21,950 fruits per acre (54,238 fruits/ha); at the rate of 1,450 per acre has produced 39,080 fruits per acre (96,369 fruits/ha); in a single year. In 1981, investigators of the earnings of plantain producers in Puerto Rico found that traditional farmers had costs of $1,568.00 per acre ($3,874.59/ha); gross income of $2,436.90 per acre ($6,021.58/ha); and net profit of $868.88 per acre ($2,146.99/ha). Those farmers who had adopted improved techniques for preparing the field, weeding and control of pests and diseases had a cost of $2,132.14 per acre ($5,268.52/ha); gross income of $4,253.26 per acre ($10,509.81/ha); and net profit of $2,121.12 per acre ($5,241.29/ha). 'Maricongo' plantains spaced at 5 x 5 ft (1.5 x 1.5 m), 1,742 plants/acre (4,303 plants/ha), have produced 33.4 tons per acre (73.5 tons/ha) over a period of 30 months.

    Handling and Packing

     Banana bunches were formerly padded with leaf trash which absorbed much of the sap and latex from the hervesting operation and the sites of broken off styles, each of which can leak at least 6 drops, especially if bunches are cut early in the morning. In the 1960's, when whole bunches were being exported from the Windward Islands and Jamaica to England, they were wrapped in wadding (paperbacked layers of paper tissue) to absorb the latex, and then encased in plastic sleeves for shipment. Nowadays plastic sleeves left on the bunches help protect them during transport from the field to distant packing sheds and a cushion of banana trash on the floor and against the sides of the truck does much to reduce injury. But the plastic bags increase the problem of staining by the sap/latex which mingles with the condensation inside the bag, becomes more fluid, runs down the inside and stains the peel. When hands are cut off, additional sap/latex mixture oozes from the severed crown. Banana growers and handlers know that this substance oxidizes and makes an indelible dark-brown stain on clothing. It similarly blemishes the fruits. At packing stations, the hands are floated through water tanks to wash it off. (Sodium hydrochlorate is an effective solvent.) Some people maintain that the fruit should remain in the tank for 30 minutes until all oozing of latex ceases. At certain times of the year, up to 5% of the hands may sink to the bottom of the tank, become superficially scarred and no longer exportable. As mentioned earlier, increased potassium in fertilizer mixtures renders the bananas more buoyant and fewer hands sink. In rainy seasons, it may be necessary to apply fungicide on the cut crown surface to avoid rotting, though experiments have shown that some fungicides give an off-flavor to the fruit. Boxing was experimented with in the late 1920's but abandoned because of various types of spoilage. Modern means of combatting the organisms that cause such problems, as well as better systems of handling and transport, quality control, and good container design, have made carton packing not only feasible but necessary. First, the hands are graded for size and quality and then packed in layers in special ventilated cartons with plastic padding to minimize bruising. In the past, bananas for export from Fiji to New Zealand were detached individually from the hands and packed tightly in 72-lb (33 kg) wooden boxes, with much bruising of the upper layer and of the fruits in contact with the sides. Reduction of fruit quality was found to offset the economic advantage of filling all the shipping space with fruits. Wooden boxes were abandoned and suppliers were converted to the packing of hands with cushioning material.

    Controlled Ripening and Storage

     At times, markets may not be able to absorb all the bananas or plantains ready for harvest. Experiments have been conducted to determine the effect of applying gibberellin, either by spraying or in the form of a lanolin paste, on the stalk just above the first hands, or by injection of a solution, powder or tablet into the stalk. In Israel, gibberellin A4A7, applied by any of these methods about 2 months before time of normal ripening, had the effect of delaying ripening from 10 to 19 days. If applied too early, the gibberellin treatment has no effect. Harvested bananas allowed to ripen naturally at room temperature do not become as sweet and flavorful as those ripened artificially. Post harvest ripening is expedited undesirably if bunches or hands are stored in unventilated polyethylene bags. As a substitute for expensive controlled-temperature storage rooms, researchers in Thailand have found that hands treated with fungicide can be stored or shipped over a period of 4 weeks in polyethylene bags if ethylene absorbing vermiculite blocks (treated with a fresh solution of potassium permanganate) are included in the sack. The permanganate solution will be ineffective if exposed to light and oxygen. The blocks must be encased in small polyethylene bags perforated only on one side to avoid staining the fruits. Bananas are generally ripened in storage rooms with 90 to 95% relative humidity at the outset, later reduced to 85% by ventilation: and at temperatures ranging from 58° to 75°F (14.4°-23.9°C), with 2 to 3 exposures to ethylene gas at 1: 1000, or 6 hourly applications for 1 to 4 days, depending on the speed of ripening desired. The fruit must be kept cool at 56° 60°F (13.3°-15.6°C) and 80 to 85% relative humidity after removal from storage and during delivery to markets to avoid rapid spoilage. Post-ripening storage at 70°F (21°C) in air containing 10 to 100 ppm ethylene accelerates softening but the fruits will remain clear yellow and attractive with few or no superficial brown specks. Plantains for processing in the ripe stage or marketing fresh must be stored under conditions that will provide the best quality of finished product. Puerto Rican studies have shown that uniform ripening is achieved in 4 to 5 days by storage at 56° to 72°F (13.3°-22.2°C), 95 to 100% relative humidity, and with a single exposure to ethylene gas. The initial 4% starch content is reduced to 1 to 1.74% and sugars increase by about 2%. The ripe fruit can be held another 6 days at 56°F (13.3°C) and still be acceptable for processing. The manufacture of products from the green, still starchy, plantain is a major industry in Puerto Rico. If held at room temperature, the fruits begin to ripen 7 days after harvest and become fully ripe at the end of 2 more days. Chemically disinfected fruits stored in polyethylene bags with an ethylene absorbent (Purefil wrapped in porous paper) keep 25 days at room temperature of 85°F (29.44°C), and for 55 days under refrigeration at 55°F (12.78°C). Products of such fruits have been found to be as good as or better than those made from freshly harvested green plantains. The potential benefits of waxing have been considered by various investigators. While it is true that waxing of pre-disinfected fruits prolongs storage life by 60% at room temperature, 78°-92°F (25.56°-33.33°C), and by 28% at 52° to 55°F (11.11°-12.78°C), there is no advantage in waxing if the fruits can be held in gas storage, a combination of waxing and gassing being no better than gassing alone. In fact, waxing may result in uneven ripening after storage. In the mid 1960's, fumigation by ethylene dibromide (EDB) against fruit fly infestation was authorized to permit export of Hawaiian bananas to the mainland USA. The treatment accelerated ripening and it could not be applied to 'Dwarf Cavendish' without covering the bunch with opaque or semi-opaque material for at least 2 months prior to harvest. EDB is no longer approved for use on food products for marketing within the United States.

    Pests

    Wherever bananas and plantains are grown, nematodes are a major problem. In Queensland, bananas are attacked by various nematodes that cause rotting of the corms: spiral nematodes—Scutellonema brachyurum, Helicotylenchus multicinctus and H. nannus; banana root-lesion nematode, Pratylenchus coffaea, syn. P. musicola; and the burrowing nematode, Radopholus similis less than 1 mm long, which enters roots and corms, causing red, purple and reddish-black discoloration and providing entry for the fungus Fusarium oxysporum. And also prevalent is the root-knot nematode, Meliodogyne javanica. Plantains in Puerto Rico are attacked by 22 species of nematodes. The most injurious is the burrowing nematode and it is the cause of the common black headtoppling disease on land where plantains have been cultivated for a long time. Wherever coffee has been grown, Pratylenchus coffaea is the principal nematode, and where plantains have been installed on former sugar cane land, Meliodogyne incognita is dominant. These last two are among the three most troublesome nematodes of Surinam, the third being Helicotylenchus spp., especially H. multicinctus. Nematicides, properly applied, will protect the crop. Otherwise, the soil must be cleared, plowed and exposed to the sun for a time before planting. Sun destroys nematodes at least in the upper several inches of earth. Some fields may be left fallow for as long as 3 years. Rotating plantains with Pangola grass (Digitaria decumbens) controls most of the most important species of nematodes except Pratylenchus coffaea. All planting material must be disinfected—corms, or parts of corms, or the bases of suckers. There are various means of accomplishing this. In Hawaii, corms are immersed in water at 122°F (50°C) for 15 minutes and soaked for 5 minutes in 1% sodium hypochlorite. In Puerto Rico, nematodes are combatted by immersing plantain corms in a solution of Nemagon for 5 minutes about 24 hours before planting and, when planting, mixing the soil in the hole with granular Dasanit (Fensulfothion) and every 6 months applying Dasanit in a ring around the pseudostem. In Queensland, corms are immersed in hot water-131°F (55°C)—for 20 minutes or solutions of nonvolatile Nemacur or Mocap. Hot water and Nemacur are equally effective but hot water has less adverse effects on plant vigor. The Australians believe that nematicidal treatment of corms must be preceded by peeling off 3/8 in (1 cm) of the outer layer (usually discolored) even though this diminishes the vigor of the planting material. However, tests with 'Maricongo' plantain corms in Puerto Rico indicate that immersing for 10 minutes in aqueous solutions of Carbofuran, Dasanit, Ethoprop, or Phenamiphos without the time consuming and possibly detrimental peeling reduces the initial nematode populations by about 95 % and all the nematicides except Carbofuran give adequate post-planting control. Carbofuran apparently does not penetrate deeply enough. The Florida spiral nematode is the most damaging nematode in Brazil and Florida, especially during hot, rainy summers. Ethoprop is the only nematicide registered for use on bananas in Florida but it is not effective against this pest. The hot water treatment must be employed. The black weevil, Cosmopolites sordidus, also called banana stalk borer, banana weevil borer, or corm weevil, is the second most destructive pest of bananas and plantains. It attacks the base of the pseudostem and tunnels upward. A jelly like sap oozes from the point of entry. It was formerly controlled by Aldrin, which is now banned. In Surinam it has been combatted by injecting pesticide into the pseudostem, or spraying the pseudostem with Monocrotophos. In Ghana, they dip planting material in a solution of Monocrotophos and apply dust of Dieldrin or Heptachlor around the base of the pseudostem. Puerto Rican tests of several pesticides have shown that Aldicarb 10G, a nematicide insecticide, applied at the base of plantain plants at the rate of 1 to 1 1/2 oz (30-45 g) every 4 months, or 1 oz (30 g) every 6 months, controls both the burrowing nematode and the black weevil. Biological control of black weevil utilizing a weevil predator, Piaesius javanus, has not been successful. The banana rust thrips, Chaetanophothrips orchidii; syn. C. signipennis, stains the peel, causes it to split and expose the flesh which quickly discolors. The pest is usually partially controlled by the spraying of Dieldrin around the base of the pseudostem to combat the banana weevil borer, because it pupates in the soil. Another measure has been to treat the inside of polyethylene bunch covers with insecticidal dust, especially Diazinon, before slipping them over the bunches. It is recognized that this procedure constitutes a health hazard to the workers. A great improvement is the introduction of polyethylene bags impregnated with 1% of the insecticide Dursban, eliminating the need for dusting. Bunches enclosed in these bags have been found 85.% free of attack by the banana rust thrips. The bags retain their potency for at least a year in storage. Impregnated with 1 to 2% Dursban, they are equal to Diazinon in preventing banana injury by the banana fruit scarring beetle, Colaspis hypochlora, also called coquito. This pest invades the bunches when the fruits are very young. It has been very troublesome in Venezuela, and at times from Guyana to Mexico. The banana scab moth, Nacoleia octasema, infests the inflorescence from emergence to the time half the bracts have lifted. It is a major pest in North Queensland, Malaysia and the southwest Pacific. Control may be by injection or dusting with pesticide, sometimes with lifting or removal of bracts. Corky scab of bananas in southern Queensland is caused by the banana flowers thrips, Thrips florum, especially in hot, dry weather. The infestation is lessened by removal of the terminal male bud which tends to harbor the pest. Among minor enemies in Queensland is the banana spider mite, Tetranychus lambi which moves from beneath the leaves to the fruits in warm weather and creates dull brown specks which may become so numerous as to completely cover the peel, causing it to dehydrate and crack irregularly. The leaves of the plant will wilt. Bi-weekly sprayings of pesticide get rid of the mites. The banana silvering thrips, Hercinothrips bicintus, causes silvery patches on the peel and dots them with shiny black specks of excrement. The rind-chewing caterpillar, Barnardiella sciaphila, usually does little damage. Two species of fruit fly—Strumeta tryoni and S. musae —occasionally attack bananas in North Queensland.

    Diseases

    The subject of diseases is authoritatively presented by C.W. Wardlaw in the second edition of his textbook, Banana Diseases, including plantains and abaca, 1972; 878 pages. It is appropriate here only to mention the main details of those maladies which are of the greatest concern to banana and plantain growers. Sigatoka, or leaf spot, caused by the fungus Mycosphaerella musicola (of which the conidial stage is Cercospora musae) was first reported in Java in 1902, next in Fiji in 1913 where it was named after the Sigatoka Valley. It appeared in Queensland 10 years later, and in another 10 years made its appearance in the West Indies and soon spread throughout tropical America. The disease was noticed in East and West Tropical Africa in 1939 and 1940. It was discovered in Ghana in 1954 and ravaged a state farm in 1965. It is most prevalent on shallow, poorly drained soil and in areas where there is heavy dew. The first signs on the leaves are small, pale spots which enlarge to 1/2 in (1.25 cm), become dark purplish black and have gray centers. When the entire plant is affected, it appears as though burned, the bunches will be of poor quality and will not mature uniformly. The fruits will be acid, the plant roots small. Control is achieved by spraying with orchard mineral oil, usuall every 3 weeks, a total of 12 applications of 1 1/2 gals per acre (14.84 liters/ha); or by systemic fungicides applied to the soil or by aerial spraying. A much more virulent malady, Black Sigatoka, or Black Leaf Streak, caused by Mycosphaerella fifiensis var. difformis, attacked bananas in Honduras in 1969 and spread to banana plantations in Guatemala and Belize. It appeared in plantations in Honduras in 1972 where there had not been any need to spray against ordinary Sigatoka. It made headway rapidly through plantain fields in Central America to Mexico and about 10 years later was found in the Uruba region of Colombia. The disease struck Fiji in 1963 and became an epidemic. It began spreading in 1973, largely replacing ordinar Sigatoka. Surveys have revealed this previously unrecognized disease on several other South Pacific islands, in Hawaii, the Philippines, Malaysia and Taiwan. It is spread mostly by wind; kills the leaves and exposes the bunches to the sun. Cultivars which are resistant to Sigatoka have shown no resistance to Black Sigatoka. There are vigorous efforts to control the disease by fungicides or intense oil spraying. But it is not completely controlled even by spraying every 10 to 12 days a total of 40 sprayings. The cost of control with fungicides is 3 to 4 times that of controlling ordinary Sigatoka because of the need for more frequent aerial sprayings. It is very difficult to treat properly on islands where bananas are grown mostly in scattered plantings. In Mexico where plantains are extremely important in the diet, and 65% of the production is on non-irrigated land, control efforts have elevated costs of plantain production by 145 to 168%. In the Sula Valley of Honduras, Black Sigatoka has caused annual losses of 3,000,000 boxes of bananas. The great need is for resistant cultivars of high quality. Panama Disease or Banana Wilt, which arises from infection by the fungus, Fusarium oxysporum f. sp. cubense originates in the soil, travels to the secondary roots, enters the corm only through fresh injuries, passes into the pseudostem; then, beginning with the oldest leaves, turns them yellow first at the base, secondly along the margins, and lastly in the center. The interior leaves turn bronze and droop. The pseudostem turns brown inside. This plague has seriously affected banana production in Central America, Colombia and the Canary Islands. It started spreading in southern Taiwan in 1967 and has become the leading local banana disease. The 'Cavendish' types have been considered highly resistant but they succumb if planted on land previously occupied by 'Gros Michel'. The disease is transmitted by soil, moving agricultural vehicles or other machinery, flowing water, or by wind. It is combatted by flooding the field for 6 months. Or, if it is not too serious, by planting a cover crop. There are reportedly two races: Race #1 affects 'Gros Michel', 'Manzano', 'Sugar' and 'Lady Finger'; Race #2 attacks 'Bluggoe'. Resistant cultivars are the Jamaican 'Lacatan', 'Monte Cristo', and 'Datil'or'Nino'. Resistant plantains are 'Maricongo', 'Enano' end 'Pelipita'. Moko Disease, or Moko de Guineo, or Marchites bacteriana, is caused by the bacterium, Pseudomonas solanacearum, resulting in internal decay. It has become one of the chief diseases of banana and plantain in the western hemisphere and has seriously reduced production in the leading areas of Colombia. It attacks Heliconia species as well. It is transmitted by insects, machetes and other tools, plant residues, soil, and root contact with the roots of sick plants. There are said to be 4 different types transmitted by different means. Efforts at control include covering the male bud with plastic to prevent insects from visiting its mucilaginous excretion; debudding, disinfecting of cutting tools with formaldehyde in water 1: 3; disinfection of planting material; disposal of infected fruits and plant parts; injection of herbicide into infected plants to hasten dehydration, and also seemingly healthy neighboring plants. If the organism is variant SFR, all adjacent plants within a radius of 16.5 ft (5 m) must be destroyed and the area not replanted for 10 to 12 months, for this variant persists in the soil that long. If it is variant B, the plants within 32.8 ft (10 m) must be injected and the area not replanted for 18 months. In either case, the soil must be kept clear of broad leaved weeds that may serve as hosts. In Colombia, there are 12 species of weeds that serve as hosts or "carriers" but only 4 of these are themselves susceptible to the disease. Crop rotation is sometimes resorted to. The only sure defense is to plant resistant cultivars, such as the 'Pelipita' plantain. Black-end arises from infection by the fungus Gloeosporium musarum, of which Glomerella cingulata is the perfect form. It causes anthracnose on the plant and attacks the stalk and stalk-end of the fruits forming dark, sunken lesions on the peel, soon penetrating the flesh and developing dark, watery, soft areas. In severe cases, the entire skin turns black and the flesh rots. Very young fruits shrivel and mummify. This fungus is often responsible for the rotting of bananas in storage. Immersing the green fruits in hot water, 131°F (55°C) for 2 minutes before ripening greatly reduces spoilage. Cigar-tip rot, or Cigar-end disease, Stachylidium ( Verticillium) theobromae begins in the flowers and extends to the tips of the fruits and turns them dark, the peel darkens, the flesh becomes fibrous. One remedy is to cut off withered flowers as soon as the fruits are formed and apply copper fungicides to the cut surfaces. In Surinam, cucumber mosaic virus attacks plantains especially when cocumber is interplanted in the fields. Also, Chinese cabbage, Cayenne pepper and "bitter greens" (Cestrum latifolium Lam.) are hosts for the disease. Cordana leaf spot (Cordana musae), causes oval lesions 3 in (7.5 cm) or more in length, brown with a bright-yellow border. There is progressive dying of the leaves beginning with the oldest, as in Sigatoka, with consequent undersized fruits ripening prematurely. It formerly occurred mainly in sheltered, humid regions of Queensland. Now it is seen mostly as an invader of areas affected by Sigatoka, in various geographical locations. Bunchy top, an aphid-transmitted virus disease of banana, was unknown in Queensland until about 1913 when it was accidentally introduced in suckers brought in from abroad. In the next 10 years it spread swiftly and threatened to wipe out the banana industry. Drastic measures were taken to destroy affected plants and to protect uninvaded plantations. The disease was found in Western Samoa in 1955 and it eliminated the susceptible 'Dwarf Cavendisht' from commercial plantings. A vigorous eradication and quarantine program was undertaken in 1956 and carried on to 1960. Thereafter, strict inspection and control measures continued. Other crops were provided to farmers in heavily infested areas. Leaves formed after infection are narrow, short, with upturned margins and become stiff and brittle; the leafstalks are short and unbending and remain erect, giving a "rosetted" appearance. The leaves of suckers and the 3 youngest leaves of the mother plant show yellowing and waviness of margins, and the youngest leaves will have very narrow, dark-green, usually interrupted ("dot-and dash") lines on the underside. Because of the seriousness of Panama disease and Bunchy Top in southern Queensland, the prospective banana planter must obtain a permit from the Queensland Department of Primary Industries. In the Southern Quarantine Area, any plant showing Bunchy Top, as well as its suckers and all plants within a 15 ft (4.6 m) radius must be killed by injecting herbicide or must be dug out completely and cut into pieces no bigger than 2 in (5 cm) wide. In restricted areas, only the immune 'Lady Finger' may be grown. In the Northern Quarantine Area, no plants may be brought in from another area and all plants within a radius of 120 ft (36.5 m) from a diseased plant must be eradicated. Swelling and splitting of the corm and the base of the pseudostem is caused by saline irrigation water and by overfertilization during periods of drought which builds up soluble salts in the soil.

    Food Uses

     The ripe banana is utilized in a multitude of ways in the human diet—from simply being peeled and eaten out of-hand to being sliced and served in fruit cups and salads, sandwiches, custards and gelatins; being mashed and incorporated into ice cream, bread, muffins, and cream pies. Ripe bananas are often sliced lengthwise, baked or broiled, and served (perhaps with a garnish of brown sugar or chopped peanuts) as an accompaniment for ham or other meats. Ripe bananas may be thinly sliced and cooked with lemon juice and sugar to make jam or sauce, stirring frequently during 20 or 30 minutes until the mixture jells. Whole, peeled bananas can be spiced by adding them to a mixture of vinegar, sugar, cloves and cinnamon which has boiled long enough to become thick, and then letting them cook for 2 minutes. In the islands of the South Pacific, unpeeled or peeled, unripe bananas are baked whole on hot stones, or the peeled fruit may be grated or sliced, wrapped, with or without the addition of coconut cream, in banana leaves, and baked in ovens. Ripe bananas are mashed, mixed with coconut cream, scented with Citrus leaves, and served as a thick, fragrant beverage. Banana puree is important as infant food and can be successfully canned by the addition of ascorbic acid to prevent discoloration. The puree is produced on a commercial scale in factories close to banana fields and packed in plastic-lined #10 cans and 55-gallon metal drums for use in baby foods, cake, pie, ice cream, cheesecake, doughnuts, milk shakes and many other products. It is also used for canning half-and-half with applesauce, and is combined with peanut butter as a spread. Banana nectar is prepared from banana puree in which a cellulose gum stabilizer is added. It is homogenized, pasteurized and canned, with or without enrichment with ascorbic acid. Sliced ripe bananas, canned in sirup, were introduced to the food trade for commercial use in frozen tarts, pies, gelatins and other products. In 1966, the United Fruit Company built a processing plant at La Lima, Honduras, for producing canned and frozen banana puree and canned banana slices. Because of seasonal gluts and perishability and the tonnages of bananas and plantains that are not suitable for marketing or export because of overripeness or stained peel or other defects, there is tremendous interest in the development of modes of processing and preserving these fruits. In Polynesia, there is a traditional method of preserving large quantities of bananas for years as emergency fare in case of famine. A pit is dug in the ground and lined with banana and Heliconza leaves. The peeled bananas are wrapped in Heliconza leaves, arranged in layer after layer, then banana leaves are placed on top and soil and rocks heaped over all. The pits remain unopened until the fermented food, called "masi", is needed. In Costa Rica, ripe bananas from an entire bunch are peeled and boiled slowly for hours to make a thick sirup which is called "honey". Green bananas, boiled in the skin, are very popular in Cuba, Puerto Rico and other Caribbean islands. In Puerto Rico, the cooked bananas are recooked briefly in a marinating sauce containing black pepper, vinegar, garlic, onions, bay leaves, olive oil and salt and left standing at room temperature for 24 hours before being eaten. Peeled, sliced green bananas are quick-frozen in Puerto Rico for later cooking. If steam treated to facilitate peeling, the enzymes are inactivated only on the surface of the flesh and the interior, when exposed, will turn brown unless sulfited. It is more satisfactory to immerse the whole bananas in water at 200°F (93°C) for 30 minutes which wholly inactivates the enzymes. No sulfite is then needed and no browning occurs. Much research has been conducted by food technologists at the University of Puerto Rico to determine the best procedures for canning sliced green bananas and plantains to make them readily available for cooking. Enzyme inactivation is necessary and the hot water treatment facilitates the peeling. If peeled raw, green bananas and plantains exude gummy white latex which stains materials. When canning, citric acid in a 2% brine is added, but this method of preservation has not yet met

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