The word “Banana” is the common name for herbaceous plants of the genus Musa and for the fruit they produce. Bananas come in a variety of sizes and colors when ripe, including yellow, purple, and red.
Almost all modern edible parthenocarpic bananas come from a number of species or hybrids in the genus Musa of the family Musaceae. 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). The old scientific names Musa sapientum and Musa paradisiaca are no longer used.
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.
DOMESTICATION:
The centre of origin of the wild banana stretches from India to Papua New Guinea and includes Malaysia and Indonesia.Within this area, some diploids, possibly hybrids, acquired the capacity to produce more pulp and became progressively seedless. Human intervention may have played a role in the generation of edible
bananas, as reports on banana cultivation in settlements close to forests in Papua New Guinea describe seedless diploids growing in the gardens of the settlements, wild diploids growing at the edge of the forests and semi-wild variants growing in areas between the two. Seedless edible bananas could only have
reached other parts of the world via the transplantation of suckers by human beings. Therefore, the history of banana varieties is closely linked to that of human populations in the tropics. History, archaeology and anthropology can all help to interpret the history of banana cultivation.
ORIGIN:
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.
STORAGE:
Bananas must be transported over long distances from the tropics to world markets. To obtain maximum shelf life, harvest comes before the fruit is mature. The fruit requires careful handling, rapid transport to ports, cooling, and refrigerated shipping. The goal is to prevent the bananas from producing their natural ripening agent, ethylene. This technology allows storage and transport for 3–4 weeks at 13 °C (55 °F). On arrival, bananas are held at about 17 °C (63 °F) and treated with a low concentration of ethylene. After a few days, the fruit begins to ripen and is distributed for final sale. Unripe bananas can not be held in home refrigerators because they suffer from the cold.
VARIETIES:
Edible bananas are classified into several main groups and subgroups. Simmonds placed first the diploid M. acuminata group ‘Sucrier’, represented in Malaya, Indonesia, the Philippines, southern India, East Africa, Burma, Thailand, the West Indies, Colombia and Brazil. The sheaths are dark-brown, the leaves yellowish and nearly free of wax. The bunches are small and the fruits small, thin-skinned and sweet. Cultivars of this group are more important in New Guinea than elsewhere.
The Cavendish subgroup includes several important bananas:
a) The ‘Dwarf Cavendish’, Plate III, first known from China and widely cultivated, especially in the Canary Islands, East Africa and South Africa.
b) The ‘Giant Cavendish’, also known as ‘Mons Mari, ‘Williams’, ‘Williams Hybrid’, or ‘Grand Naine’, is of uncertain origin, closely resembles the ‘Gros Michel’, and has replaced the ‘Dwarf’ in Colombia, Australia, Martinique, in many Hawaiian plantations, and to some extent in Ecuador.
c) ‘Pisang masak hijau’, or ‘Bungulan’, the triploid Cavendish clone of the Philippines, Indonesia and Malaya, is erroneously called ‘Lacatan’ in Jamaica where it replaced ‘Gros Michel’ because of its immunity to Panama disease, though it is subject to Sigatoka (leaf spot).
d) ‘Robusta’, very similar to the so-called ‘Lacatan’, has largely replaced that cultivar in Jamaica and the Windward Islands and the ‘Gros Michel’ in Central America because it is shorter, thick-stemmed, less subject to wind.
e) ‘Valery’, also a triploid Cavendish clone, closely resembles ‘Robusta’ and some believe it may be the same.
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.
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.
measurements are not critical but we use this for our convenience. The container must be water tight and dark inside. The worms are happier when kept in the dark. If your container is transparent, wrap it with newspapers or store it in a dark place. Make use the place where you put your container is free of vibrations. Your worms might pack and move to other digs if they are to close to vibration.
