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1 January 2014 Effect of Mowing Height and Fertility on Bermudagrass ( Cynodon dactylon) Encroachment and Brown Patch Severity in Tall Fescue
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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.

Nomenclature: Bermudagrass; Cynodon dactylon (L.) Pers.; brown patch; Rhizoctonia solani Kuhn; tall fescue; Lolium arundinaceum (Schreb.) S.J. Darbyshire (syn. Festuca arundinacea Schreb. var. arundinacea Schreb.).

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.

Matthew Cutulle, Jeffrey Derr, David McCall, Adam Nichols, and Brandon Horvath "Effect of Mowing Height and Fertility on Bermudagrass ( Cynodon dactylon) Encroachment and Brown Patch Severity in Tall Fescue," Weed Technology 28(1), 225-232, (1 January 2014). https://doi.org/10.1614/WT-D-13-00121.1
Received: 25 July 2013; Accepted: 1 October 2013; Published: 1 January 2014
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