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Book: Proceedings of the Second International Turfgrass Research Conference
Published by: American Society of Agronomy, Crop Science Society of America

 

This chapter in PROCEEDINGS OF THE SECOND INTERNATIONAL TURFGRASS RESEARCH CONFERENCE

  1.  p. 74-78
     
    Proceedings of the Second International Turfgrass Research Conference

    Eliot C. Roberts (ed.)

    ISBN: 978-0-89118-573-4

     

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doi:10.2135/1974.proc2ndintlturfgrass.c10

Flowering response of several selections of St. Augustinegrass1

  1. A.E. Dudeck

Abstract

The flowering response of ten clones of St. Augustinegrass Stenotaphrum secundatum (Walt.) Kuntze was studied in the field and under controlled conditions. Under field conditions in South Florida, the maximum number of inflorescences in all clones emerged during June. However, some clones flowered sporadically year-round. A study involving 8-, 10-, 12-, and 133-hour photoperiods confirmed that all plants flowered best under long photoperiods but that three clones flowered to some degree under all photoperiods. Maximum flowering at the 133-hour photoperiod occurred 6 to 7 weeks after initiation of the study. Uniform flowering could be induced in the greenhouse by preconditioning the plants for 3 weeks with 8-hour photoperiods at 24 C and 16-hour dark periods at IOC followed by 7 weeks at 27 G with 2 hours of interrupted light at midnight. Additional index words: Grass breeding, Preconditioning, Photoperiod, Stenotaphrum secundatum (Walt.) Kuntze.

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Copyright © 1974. Copyright 1974 by the American Society of Agronomy, Inc. and the Crop Science Society of America, Inc., 5585 Guilford Rd., Madison, WI 53711 USA