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Influence of nutrient management and soil pH on anthracnose severity of annual bluegrass putting green turf

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TitleInfo
Title
Influence of nutrient management and soil pH on anthracnose severity of annual bluegrass putting green turf
Name (type = personal)
NamePart (type = family)
Schmid
NamePart (type = given)
Charles J.
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Charles J. Schmid
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RoleTerm (authority = RULIB)
author
Name (type = personal)
NamePart (type = family)
Murphy
NamePart (type = given)
James A
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James A Murphy
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Advisory Committee
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chair
Name (type = personal)
NamePart (type = family)
Clarke
NamePart (type = given)
Bruce B
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Bruce B Clarke
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Advisory Committee
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co-chair
Name (type = personal)
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Gimenez
NamePart (type = given)
Daniel
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Daniel Gimenez
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Advisory Committee
Role
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internal member
Name (type = personal)
NamePart (type = family)
Gaussoin
NamePart (type = given)
Roch E
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Roch E Gaussoin
Affiliation
Advisory Committee
Role
RoleTerm (authority = RULIB)
outside member
Name (type = corporate)
NamePart
Rutgers University
Role
RoleTerm (authority = RULIB)
degree grantor
Name (type = corporate)
NamePart
Graduate School - New Brunswick
Role
RoleTerm (authority = RULIB)
school
TypeOfResource
Text
Genre (authority = marcgt)
theses
OriginInfo
DateCreated (qualifier = exact)
2016
DateOther (qualifier = exact); (type = degree)
2016-10
CopyrightDate (encoding = w3cdtf); (qualifier = exact)
2016
Place
PlaceTerm (type = code)
xx
Language
LanguageTerm (authority = ISO639-2b); (type = code)
eng
Abstract (type = abstract)
Anthracnose (Colletotrichum cereale Manns sensu lato Crouch, Clarke, and Hillman) is a fungal disease of annual bluegrass [Poa annua L. f. reptans (Hausskn) T. Koyama; ABG] turf, which can be intensified when abiotic conditions weaken turfgrass plants. Five field trials conducted from 2009 to 2015 evaluated the effects of N program, soluble N rate, N source, K source and rate, and soil pH on anthracnose severity of ABG maintained as putting green turf. Soluble N rate applied during midseason had the greatest influence on anthracnose severity. Granular N rate and season in which the majority of granular N was applied also influenced disease severity but to a lesser extent. Soluble N applied at 73 kg N ha-1 yr-1 in combination with moderate rates (147 or 220 kg N ha-1 yr-1 ) of granular N applied during the spring resulted in the greatest reduction in disease severity. Further analysis of the influence of soluble N rate on anthracnose severity found that higher rates (14.6 to 24.4 kg N ha-1 wk-1 ) of soluble N can be applied from late-spring through early-summer to reduce disease severity, but as the summer progresses moderate (9.8 kg N ha-1 wk-1 ) to low (4.9 kg N ha-1 wk-1 ) rates of soluble N should be applied to avoid excessive rates of N increasing disease severity. Playability (i.e. ball roll distance) of ABG turf was reduced by rates of soluble N applied at ≥ 14.6 kg ha-1 wk-1 compared to N applied at 4.9 kg ha-1 wk-1 . Basic N sources (potassium nitrate and calcium nitrate) applied at 4.9 kg N ha-1 every 7-d reduced disease severity compared acidic N sources (ammonium nitrate and ammonium sulfate) applied at the same rate and frequency; however, when N was applied at 4.9 kg ha-1 every 14-d, disease severity was greater and few differences were seen among N sources. Potassium (K) fertilization reduced anthracnose severity regardless of K rate or K source. Critical soil K and leaf K concentration values affecting anthracnose severity were calculated to range from 43 to 70 mg kg-1 (Mehlich 3) and 19.3 to 23.1 g kg-1 , respectively, using nonlinear regression models (Cate-Nelson, linear plateau, and quadratic plateau). Plots with moderately acidic soil (pH < 5.5) and deficiencies in extractable soil Ca increased disease severity compared to plots with neutral (to slightly acidic) soil pH and adequate soil Ca. Optimum soil pH for reducing anthracnose severity and maintaining acceptable turfgrass quality of ABG putting green turf was between pH 6.0 and 6.5 and critical soil Ca concentrations ranged from 392 to 825 mg kg-1 . It is not clear whether acidic soil conditions and/or deficiencies in extractable Ca caused increased anthracnose severity and a reduction in turfgrass performance. Taken together, these studies clearly indicate that best management practices that include proper plant nutrition and possibly modification of soil pH are effective at reducing anthracnose severity and should be incorporated into an integrated disease control program.
Subject (authority = RUETD)
Topic
Plant Biology
Subject (authority = ETD-LCSH)
Topic
Bluegrasses
Subject (authority = ETD-LCSH)
Topic
Soil management
Subject (authority = ETD-LCSH)
Topic
Golf courses
RelatedItem (type = host)
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Title
Rutgers University Electronic Theses and Dissertations
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ETD
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ETD_7527
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electronic resource
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application/pdf
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text/xml
Extent
1 online resource (xxiv, 274 p. : ill.)
Note (type = degree)
Ph.D.
Note (type = bibliography)
Includes bibliographical references
Note (type = statement of responsibility)
by Charles J. Schmid
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TitleInfo
Title
Graduate School - New Brunswick Electronic Theses and Dissertations
Identifier (type = local)
rucore19991600001
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NjNbRU
Identifier (type = doi)
doi:10.7282/T3ZW1P63
Genre (authority = ExL-Esploro)
ETD doctoral
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The author owns the copyright to this work.
RightsHolder (type = personal)
Name
FamilyName
Schmid
GivenName
Charles
MiddleName
J.
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RightsEvent
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Permission or license
DateTime (encoding = w3cdtf); (qualifier = exact); (point = start)
2016-09-02 10:43:10
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Charles Schmid
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Rutgers University. Graduate School - New Brunswick
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I hereby grant to the Rutgers University Libraries and to my school the non-exclusive right to archive, reproduce and distribute my thesis or dissertation, in whole or in part, and/or my abstract, in whole or in part, in and from an electronic format, subject to the release date subsequently stipulated in this submittal form and approved by my school. I represent and stipulate that the thesis or dissertation and its abstract are my original work, that they do not infringe or violate any rights of others, and that I make these grants as the sole owner of the rights to my thesis or dissertation and its abstract. I represent that I have obtained written permissions, when necessary, from the owner(s) of each third party copyrighted matter to be included in my thesis or dissertation and will supply copies of such upon request by my school. I acknowledge that RU ETD and my school will not distribute my thesis or dissertation or its abstract if, in their reasonable judgment, they believe all such rights have not been secured. I acknowledge that I retain ownership rights to the copyright of my work. I also retain the right to use all or part of this thesis or dissertation in future works, such as articles or books.
RightsEvent
DateTime (encoding = w3cdtf); (qualifier = exact); (point = start)
2016-10-31
DateTime (encoding = w3cdtf); (qualifier = exact); (point = end)
2017-10-31
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Access to this PDF has been restricted at the author's request. It will be publicly available after October 31st, 2017.
Copyright
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Copyright protected
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