Received for publication April 17, 1979. Paper No. 5982 of the Journal Series of the North Carolina Agricultural Research Service. Appreciation is expressed to Yoder Bros., Inc., Barberton, Ohio for providing rooted chrysanthemum cuttings, and to the Phytotron staff for their cooperation throughout the studies. Use of tradenames does not imply endorsement by the North Carolina Agricultural Research Service of the products named or criticism of similar products not mentioned.
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