1Received for publication March 3, 1973. Paper No. 3984 of the Journal Series of the North Carolina State University Agricultural Experiment Station.
2Assistant Professor, Department of Horticultural Science. The author expresses appreciation to Mr. Harrell G. Todd for his field and laboratory assistance.
3Trademark, Racuza. Research grant and materials supplied by the Velsicol Chemical Corporation, Chicago, I11.
1018 Duke Street
Alexandria, VA 22314
© 2018-2023 American Society for Horticultural Science
Character limit 500/500