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Cultivated bananas are parthenocarpic, which makes them sterile and unable to produce viable seeds. Lacking seeds, another form of propagation is required. This normally involves removing and transplanting part of the underground stem (called a corm). Usually this is done by carefully removing a sucker (a vertical shoot that develops from the base of the banana pseudostem) with some roots intact. However, small sympodial corms, representing not yet elongated suckers, are easier to transplant and can be left out of the ground for up to 2 weeks; they require minimal care and can be boxed together for shipment. Contrary to what is widely believed, it is not actually necessary to include any of the corm or root structure to propagate bananas; severed suckers with no root material attached can be successfully propagated in damp sand, although this takes somewhat longer. In some countries, bananas are also commercially propagated by means of tissue culture. This method is preferred since it ensures disease-free planting material. When using vegetative parts such as suckers for propagation, there is a risk of transmitting diseases (especially the devastating Panama disease). ** i find it in wikipedia ---------------------------------------------------------------------- [url=http://www.ichatagriculture.com/]Agriculture Latest News and Updates[/url]