Coffee historians believe most of the world's Arabica coffee crop shares genetic ancestry with two 18th century plants: one brought to Europe from Indonesia, and another taken from Yemen and cultivated in Brazil.

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Since 1971, Starbucks Coffee Company has been committed to ethically sourcing and roasting the highest-quality arabica coffee in the world.

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Futures for arabica coffee, the variety most commonly brewed in the world, have been falling along with other commodities, amid gloomy headlines out of Europe.

WSJ: Trouble Brews in Colombia

The company forecast that fiscal year profits for 2011 will be offset by 20 cents per share due to the rising price of arabica coffee beans.

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World output of arabica coffee will shrink 4.3% to 79.6 million bags in the current crop year, which began in October, according to the London-based International Coffee Organization.

WSJ: Trouble Brews in Colombia

The fungus has ruined what was supposed to be a good year for Colombia, the world's second-largest producer of high-quality arabica coffee, the mild-flavored, hand-picked beans for which coffee traders usually pay a premium.

WSJ: Trouble Brews in Colombia