Go to your local grocery store, and you might see 20 different varieties of apples,from Granny Smith and Gala to Jazz,Cameo,and Pacific Rose.It wansn't that way a few years ago.Red Delicious apples-bright,firm,and easy to store-used to be the clear favorites. As recently as 1998,Red Delicious apples accounted for 40 percent of all the apples produced in the United States.