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Effect of Mowing Height and Fertility on Bermudagrass (Cynodon dactylon) Encroachment and Brown Patch Severity in Tall Fescue

Published online by Cambridge University Press:  20 January 2017

Matthew Cutulle ,
Jeffrey Derr ,
David McCall ,
Adam Nichols  and
Brandon Horvath
Matthew Cutulle*
Affiliation:
Department of Plant Pathology, Physiology, and Weed Science, Virginia Polytechnic Institute and State University, Hampton Roads Agricultural Research and Extension Centers, 1444 Diamond Springs Road, Virginia Beach, VA 23455
Jeffrey Derr
Affiliation:
Department of Plant Pathology, Physiology, and Weed Science, Virginia Polytechnic Institute and State University, Hampton Roads Agricultural Research and Extension Centers, 1444 Diamond Springs Road, Virginia Beach, VA 23455
David McCall
Affiliation:
Department of Plant Pathology, Physiology, and Weed Science, Virginia Polytechnic Institute and State University, Price Hall, Blacksburg, VA 24061
Adam Nichols
Affiliation:
Department of Plant Pathology, Physiology, and Weed Science, Virginia Polytechnic Institute and State University, Hampton Roads Agricultural Research and Extension Centers, 1444 Diamond Springs Road, Virginia Beach, VA 23455
Brandon Horvath
Affiliation:
Plant Science Department, University of Tennessee, 252 Ellington Plant Science Building, 2431 Joe Johnson Drive, Knoxville, TN 37996
*
Corresponding author's E-mail: [email protected].
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Abstract

Tall fescue is a commonly used turfgrass in the temperate and transition zone areas of the United States. During hot, humid summers, tall fescue is under stress and is susceptible to Rhizoctonia solani (brown patch) infection, causing turf thinning, leading to encroachment from weeds, such as bermudagrass. Field trials were established to evaluate the effect of mowing height and fertility programs on disease severity and bermudagrass encroachment in tall fescue. Mowing at 10 cm resulted in less bermudagrass encroachment than did a 6-cm mowing height. Increasing the nitrogen fertilization level from 49 to 171 and 220 kg N ha−1 generally led to more bermudagrass encroachment at the 6-cm, but not the 10-cm, mowing height. Plots receiving 220 kg N ha−1 annually at the 6-cm mowing height had the most brown patch. Turfgrass cover was greatest in plots mowed at 10 cm and receiving 220 kg N ha−1 annually.

Lolium arundinaceum es usado comúnmente como césped en zonas templadas y de transición en los Estados Unidos. Durante veranos calientes y húmedos, L. arundinaceum sufre estrés y es susceptible a la infección de Rhizoctonia solani (mancha parda), lo que causa el raleo del césped y la consecuente colonización de malezas, tales como Cynodon dactylon. Se establecieron estudios de campo para evaluar el efecto de la altura de chapia y los programas de fertilidad en la severidad de la enfermedad y la colonización de C. dactylon en L. arundinaceum. La chapia a 10 cm resultó en menor colonización de C. dactylon que la chapia a 6 cm de altura. El incrementar el nivel de fertilización nitrogenada de 49 a 171 y 220 kg N ha−1 generalmente llevó a una mayor colonización de C. dactylon en la chapia a 6 cm, pero no en la chapia a 10 cm de altura. Las parcelas que recibieron 220 kg N ha−1 anualmente y chapia a 6 cm de altura tuvieron la mayor severidad de mancha parda. La cobertura del césped fue mayor en las parcelas con chapia a 10 cm y que recibieron 220 kg N ha−1 anualmente.

Keywords

Bermudagrass, Cynodon dactylon (L.) Persbrown patch, Rhizoctonia solani Kuhntall fescue, Lolium arundinaceum (Schreb.) S.J. Darbyshire (syn. Festuca arundinacea Schreb. var. arundinacea Schreb.)Cultural practicesturf diseaseturfgrass
Type
Research Article
Information
Weed Technology , Volume 28 , Issue 1 , March 2014 , pp. 225 - 232
Copyright
Copyright © Weed Science Society of America 

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Footnotes

Current address: Postdoctoral Scholar, Plant Science Department, University of Tennessee, 252 Ellington Plant Science Building, 2431 Joe Johnson Drive, Knoxville, TN 37996

References

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