Received for publication 26 Aug. 1985. Florida Agricultural Experiment Stations Journal Series no. 6820. I wish to express my sincere appreciation to Walter L. Preston, Manatee Fruit Company, Palmetto, Fla. for providing the plant material used in this research. The cost of publishing this paper was defrayed in part by the payment of page charges. Under postal regulations, this paper therefore must be hereby marked advertisement solely to indicate this fact.