The Resource Allelopathic effects and removal of overseeded ryegrass on bermudagrass, by Brad S. Fresenburg, (electronic resource)

Allelopathic effects and removal of overseeded ryegrass on bermudagrass, by Brad S. Fresenburg, (electronic resource)

Label
Allelopathic effects and removal of overseeded ryegrass on bermudagrass
Title
Allelopathic effects and removal of overseeded ryegrass on bermudagrass
Statement of responsibility
by Brad S. Fresenburg
Creator
Contributor
Thesis advisor
Subject
Genre
Language
eng
Summary
Allelopathy is a complex phenomenon among plants that involves the production of defensive chemicals that influence the growth and survival of adjacent plants. Plants like perennial ryegrass become suspect when bermudagrass (Cynodon spp.) cover is reduced by 88% when seeded into perennial ryegrass. Over-seeding bermudagrass with ryegrass (Lolium spp.) is a common cultural practice on golf courses and athletic fields in late summer as bermudagrass becomes dormant. In spring, removal of ryegrass is essential for bermudagrass recovery or decline of bermudagrass is inevitable. However, underlying reasons for this decline is unknown. Objectives of this research were to assess allelopathic effects of ryegrasses on bermudagrass and determine best management practices for spring removal of intermediate (Lolium multiforum Lam. x Lolium perenne L.) and perennial ryegrass by cultural practices and herbicide applications. Cultural practices (mowing and fertility) reduced intermediate ryegrass stand by 10% when mowing height was decreased and urea fertilizer was added. Mowing height and fertilizer applications, alone, are not sufficient in the removal of improved perennial ryegrasses. Herbicide treatments (chlorsulfuron, rimsulfuron, metsulfuron, trifloxysulfuron, foramsulfuron, and sulfosulfuron) resulted in rapid reductions ([greater than] 95%) of all ryegrass cultivars. All herbicide treatments enhanced bermudagrass recovery. In vitro agar-assays with ryegrass water extracts reduced bermudagrass seed germination by 62%. Fractionation of soluble allelochemicals by HPLC confirmed inhibitory activity on bermudagrass seed germination from 37 to 0%. While cultural practices alone may not be enough to remove perennial ryegrass, chemical removal of ryegrasses may be too rapid for a smooth spring transition. Identifying allelochemicals in ryegrass could lead to the development of natural bermudagrass herbicides
Cataloging source
MUU
http://library.link/vocab/creatorDate
1954-
http://library.link/vocab/creatorName
Fresenburg, Brad S.
Degree
Ph. D.
Dissertation year
2010.
Granting institution
University of Missouri--Columbia
Illustrations
illustrations
Index
no index present
Literary form
non fiction
Nature of contents
  • dictionaries
  • bibliography
  • theses
http://library.link/vocab/relatedWorkOrContributorDate
1960-
http://library.link/vocab/relatedWorkOrContributorName
Smeda, R. J.
http://library.link/vocab/subjectName
  • Allelopathic agents
  • Ryegrasses
  • Bermuda grass
Target audience
specialized
Label
Allelopathic effects and removal of overseeded ryegrass on bermudagrass, by Brad S. Fresenburg, (electronic resource)
Instantiates
Publication
Note
  • Title from PDF of title page (University of Missouri--Columbia, viewed on March 7, 2011)
  • The entire thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file; a non-technical public abstract appears in the public.pdf file
  • Dissertation advisor: Dr. Reid J. Smeda
  • Vita
Bibliography note
Includes bibliographical references
Carrier category
online resource
Carrier category code
  • cr
Carrier MARC source
rdacarrier
Content category
text
Content type code
  • txt
Content type MARC source
rdacontent
Control code
706711230
Extent
1 online resource (104 pages)
Form of item
online
Media category
computer
Media MARC source
rdamedia
Media type code
  • c
Other physical details
illustrations (some color).
Specific material designation
remote
System control number
(OCoLC)706711230
Label
Allelopathic effects and removal of overseeded ryegrass on bermudagrass, by Brad S. Fresenburg, (electronic resource)
Publication
Note
  • Title from PDF of title page (University of Missouri--Columbia, viewed on March 7, 2011)
  • The entire thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file; a non-technical public abstract appears in the public.pdf file
  • Dissertation advisor: Dr. Reid J. Smeda
  • Vita
Bibliography note
Includes bibliographical references
Carrier category
online resource
Carrier category code
  • cr
Carrier MARC source
rdacarrier
Content category
text
Content type code
  • txt
Content type MARC source
rdacontent
Control code
706711230
Extent
1 online resource (104 pages)
Form of item
online
Media category
computer
Media MARC source
rdamedia
Media type code
  • c
Other physical details
illustrations (some color).
Specific material designation
remote
System control number
(OCoLC)706711230

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