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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. 458-462
     
    Proceedings of the Second International Turfgrass Research Conference

    Eliot C. Roberts (ed.)

    ISBN: 978-0-89118-573-4

     
    Published: 1974


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doi:10.2135/1974.proc2ndintlturfgrass.c69

Growth retardant effects on various grass tissues and organs1

  1. V. B. Youngner and
  2. F. J. Nudge

Abstract

Root growth, tillering, rhizome development, stolon branching, and reserve carbohydrates as affected by three growth retardants, (2 chloroethyl) trimethylammonium (CCC), a-cyclopropyl, a4-methoxypropyl, a-5 pyrimidine methanol (ancymidol), and chloride 3-trifluromethyl-sulfonamido-p-acetotoluidide (fluoridimide), were studied in several experiments. CCC retarded root growth of bermudagrass (Cynodon spp.) slightly, but did not affect root growth of Kentucky blue grass (Poa pratensis L.) until high rates were reached. Ancymidol inhibited root growth of Kentucky blue grass only at high rates. Tillering of Kentucky bluegrass was stimulated by CCC and ancymidol but rhizome development was inhibited. Fluor idimide did not stimulate either tillering or rhizome development. Nodal branching of bermudagrass, St. Augustinegrass (Stenotaphrum secundatum Walt., Kuntze), and kikuyugrass (Pennisetum clandestinum Hachst.) was stimulated by CCC and ancymidol while internode elongation was restricted. Fluoridimide did not affect internode elongation or nodal branching of these species. Nonstructural carbohydrate percentages of bermudagrass were not affected by CCC. Additional index words: Root growth, Tillering, Rhizomes, Carbohydrate reserves, CCC, Ancymidol, Turfgrasses, Fluoridimide.

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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