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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. 325-327
     
    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.c45

Fusarium blight of Kentucky bluegrass in California

  1. R. M. Endo and
  2. P. F. Colbaugh

Abstract

A destructive basal stem and crown rot affecting Kentucky bluegrass (Poa pratensis L.) in California was shown to be caused by Fusarium roseum f. sp. cerealis ‘Culmorum.’ The foliage blight stage and frog-eye pattern of disease development were observed to be rare. Disease development was favored in seedlings in greenhouse studies by soil temperatures between 26.8 and 32 C, and on mature plants in the field by overfertilization with nitrogen, and by periods of temporary drought stress. Direct counts of F. roseum macro-conidia from equivalent weights of partially decomposed litter taken from moist and drought-stressed bluegrass field plots demonstrated increased condial numbers on litter from intermittently dry areas of turf. Additional index words: Crown rot, Drought stress, Fusarium roseum, Kentucky bluegrass, Poa pratensis L., Litter.

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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