Preparing to pinch-hit for France, Italy, the Balkans, Japan and other countries, growers in Florida are experimenting with foreign import crops which have been interrupted by the war. With the cooperation of the State Experiment Station at Gainesville, Fla., the Everglades area is trying to raise French endive, formerly imported from France and Belgium. Several other Florida growers are investigating the special small varieties of tomatoes used in making tomato paste, formerly brought from Italy. Then there is sage for seasoning, from Greece; mustard and turnip seed, from Japan; and teasel burrs, from France, used in American mills for combing wool. All these, it is believed, can be grown in Florida. Paprika, once imported from Balkan countries, already is grown in Louisiana, South Carolina and California, and one seed grower in Florida is raising 100 acres of spinach seed which formerly came from Holland and Denmark.