Title

Identification and distribution of ectotrophic root-infecting fungi within an ultradwarf bermudagrass putting green and fungicide efficacy associated with these fungi

Advisor

Tomaso-Peterson, Maria

Committee Member

McCurdy, James D.

Committee Member

King, Jonas G.

Date of Degree

8-1-2020

Original embargo terms

Visible to MSU only for 1 year||forever||8/15/2021

Document Type

Graduate Thesis - Open Access

Department

Department of Biochemistry, Molecular Biology, Entomology and Plant Pathology

Abstract

This research addressed the identification and distribution of selected ERI fungi within two greens at Mississippi State University Golf Institute using novel molecular methods, spatial relationships of fungal distribution and turf health assessments, and fungal sensitivity to selected fungicides. A complex of ERI fungi was identified in both greens. Gaeumannomyces graminis, Gaeumannomyces sp., and Candidacolonium cynodontis were randomly distributed based on spatial autocorrelation in both green samplings, while Magnaporthiopsis cynodontis clustered in Green 2 for both samplings and in Green 12 of the 2018 sampling. Clustering of turf health values was variable by month in each green, and no spatial relationship was determined between turf health values and fungal presence. Five ERI fungal isolates were exposed to four fungicide classes with relative growth present at 100 ppm. The EC50 values for the selected fungi ranged from 2.33 to >100 ppm and suggests a lack of sensitivity to the selected fungicides.

URI

https://hdl.handle.net/11668/18006

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