Present address: Dept. of Horticulture and Landscape Architecture, Washington State Univ., Southwetem Washington Research Unit, 1919 NE 78th St., Vancouver, WA 98665.
Present address: Agricultural Research and Education Center, Univ. of Florida, 700 Experiment Station Rd., Lake Alfred, FL 33850.
Received for publication 13 Oct. 1983. Approved by the Director of the New York State Agricultural Experiment Station for publication as Journal Paper No. 3540. 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.