Received for publication August 23, 1975. Approved by the Director of the New York State Agricultural Experiment Station as Journal Series Paper No. 2231. This investigation was supported in part by grants from the Herman Frasch Foundation and the American Seed Research Foundation to A. A. Khan. The authors gratefully acknowledge the gift of Ethrel, Amchem 68-214 Technical from Amchem Products, Inc. and seeds from Ferry-Morse Seed Co.
Present address: Tocklai Experimental Station, Jorhat-785008, Assam, India.