Why the pumpkin is the symbol of Halloween?

Halloween festival is widely celebrated and decorated in the second largest festival in the U.S. and many countries around the world. There are things that you will never see the absence of which is Halloween pumpkins. So why is carved pumpkin (pumpkin-carving) into ghostly shapes was considered the most characteristic symbols of the festival?

According to Irish legend of the 18th century, formerly a peasant boy known alcoholics having the intelligence Ha Add an alias Jack (Jack stingy). One day the guy is inviting demons Jack King.
Satan (Satan devil) (boss of all kinds of demons) to drink. But Jack did not want to pay him so we went enticing demons make themselves into the chemical allowed the currency to buy alcohol Jack together for fun. Dirt devil hear immediately turned into money is immediately taken away Jack picked the pocket of a cross that is available in silver (a silver cross) that demons can not return to original shape demons anymore. Jack then freed demons but also provided that demons are not disturbed during the first year Jack, and if Jack dies, you will not be collecting souls (soul) of Jack. One year after fearing to disturb her demons, Jack the devil to deceive the demons to climb the tree picking fruit. While the demons are still struggling on the tree Jack carved a cross right into the trunk, so that demons were afraid to climb down and Jack agreed with demons is not teasing him another 10 years, the new Jack and drop it down. Shortly after that Jack died. Ghosts (Wraith) Jack knocked on the door of heaven (gates of heaven), but God does not receive because fraud (tricks) to the devil that his god can not think for a man so cunning as a way to heaven (heaven). Hell, the fear of Satan while demons met before Jack was so angry like hell is not finished. But when down to hell (hell reached) have demon Satan, because promises should not turn over Jack Jack chase away demons, but expressed remorse should give Jack a piece of charcoal to the navigation in the dark (find His Way in the darkness). Jack up the red fire coal into a rotten potato to light and vicious on earth throughout the realm (Wandering in the unending darkness Between heaven and hell) and customs put candles in pumpkins or potatoes in red Halloween ... it comes from. The Irish referred to Jack as Jack of the Lantern, that is Jack lantern, and later called the Jack-O'Lantern (lit Jack-O'Lantern).
As Jack so dodgy and cunning people in the village believed that the soul of Irish Jack will be able to return to it every Halloween season, they carved (carve) to the beet or potato shape ... surface and bring the cunning displayed in the window sill or door to exorcise the ghosts of King as Jack does not throw it into their home (ward off the evil spirits away and keep the stingy Jack) on the night of Oct. 31 - the Holy Night (All Saints' Night).
This tradition was changed when the immigrants from Ireland and Britain to the United States, they found that pumpkins red, pumpkin or pumpkin, a special fruit is grown widelyNorth America (this was the kind of Results represent the lush crops in the U.S.). Orange fruit is the most appropriate material for them to cut bowel sniper guy's face Jack-O'Lantern cunning, more lighting when they see pumpkins in the morning rather than the lighting inside the turnip, potatoes or squash it into pumpkins for Halloween symbol (a symbol for Halloween) is derived as.
Pumpkin has become a prominent symbol of Halloween. Therefore pumpkin business has become a big business, bringing the annual value of crops for farmers in the United States, Canada, England, Northern Ireland, Australia .... when the Halloween season.