Full TGIF Record # 317081
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Web URL(s):https://scisoc.confex.com/scisoc/2021am/meetingapp.cgi/Paper/133577
    Last checked: 03/29/2022
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Publication Type:
Content Type:Abstract or Summary only
Author(s):Mattox, Clint; McDonald, Brian W.; Braithwaite, Emily T.; Kowalewski, Alexander R.
Author Affiliation:Mattox, McDonald, and Kowalewski: Horticulture, Oregon State University, Corvallis, OR; Braithwaite: Horticulture, Oregon State University, Salem, OR
Title:Suppression of Microdochium patch using iron sulfate and chelated iron in the absence and presence of phosphorous acid
Section:Turf pest management oral III
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C05 turfgrass science
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Meeting Info.:Salt Lake City, Utah: November 7-10, 2021
Source:ASA, CSSA and SSSA International Annual Meetings. 2021, p. 133577.
Publishing Information:[Madison, Wisconsin]: [American Society of Agronomy, Crop Science Society of America, and Soil Science Society of America]
# of Pages:1
Abstract/Contents:"Microdochium patch, caused by Microdochium nivale, is a turfgrass disease that occurs in cool-humid regions. Previous research has shown that iron sulfate and phosphorous acid applications suppress Microdochium patch, and that the combination of low rates of both products improve turfgrass quality compared to either product alone. There is a concern about the long-term use of iron sulfate on annual bluegrass putting greens because of the risk of turfgrass thinning and the long-term effects of iron sulfate applications on soil pH. Little is known about alternative iron sources, such as chelated iron, on the effects of Microdochium patch suppression. A seven-month field experiment repeated over three years starting in September and concluding in April was conducted on an annual bluegrass putting green in Corvallis, Oregon from September 2018 to April 2021 comparing the effects of iron sulfate and chelated iron applied in the presence and absence of phosphorous acid. The experiment was arranged as a randomized complete block design with four replications. The experimental plots were 1.5 m2 and the total experimental area was 66m2. Treatments consisted of 4.9 kg Fe ha-1, and 9.8 kg Fe ha-1 applied as iron sulfate heptahydrate or DTPA chelated iron in a tank mix with 0 or 3.7 kg phosphorous acid ha-1 every two weeks. In addition, a phosphorous acid only treatment of 3.7 kg phosphorous acid ha-1 applied every two weeks, a traditional fungicide rotation applied every four weeks, and a non-treated control were included. Dependent variables included percent Microdochium patch, NDVI, and turfgrass quality. Results show that iron sulfate suppresses disease more than chelated iron when applied alone, however there is no difference in suppression when combinations of either iron source are applied with phosphorous acid. Soil samples were collected in May of each year and samples are currently being processed."
Note:This item is an abstract only!
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Mattox, C., B. W. McDonald, E. T. Braithwaite, and A. R. Kowalewski. 2021. Suppression of Microdochium patch using iron sulfate and chelated iron in the absence and presence of phosphorous acid. Agron. Abr. p. 133577.
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    Last checked: 03/29/2022
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