Received for publication December 10, 1969. Approved by the Director of the New York Agricultural Experiment Station for publication as Journal Paper No. 1619. The authors thank Merck and Co.for supplying KGA3, and U.S. Rubber for Alar. The assistance of Mrs. Lareta Millerd, Miss Chi-li Kiang, and Mr. Calvin Adams, is gratefully acknowledged.
Present address: Department of Horticulture, Michigan State University, East Lansing.