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Title
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A combination of lightweight rolling and sand topdressing to decrease fungicide inputs and enhance golf course fairway turf quality
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Creator
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Green, Thomas O.
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Date
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2015
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Collection
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Electronic Theses & Dissertations
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Description
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ABSTRACTA COMBINATION OF LIGHTWEIGHT ROLLING AND SAND TOPDRESSING TO DECREASE FUNGICIDE INPUTS AND ENHANCE GOLF COURSE FAIRWAY TURF QUALITYByThomas O. Green Dollar spot (Sclerotinia homoeocarpa F.T. Bennett) is a pervasive turfgrass disease in the upper Midwest affecting turfgrass quality, decreasing golf course playability, and resulting in millions of dollars spent on frequent fungicide applications. Michigan State University scientists observed reduced dollar spot infection in putting...
Show moreABSTRACTA COMBINATION OF LIGHTWEIGHT ROLLING AND SAND TOPDRESSING TO DECREASE FUNGICIDE INPUTS AND ENHANCE GOLF COURSE FAIRWAY TURF QUALITYByThomas O. Green Dollar spot (Sclerotinia homoeocarpa F.T. Bennett) is a pervasive turfgrass disease in the upper Midwest affecting turfgrass quality, decreasing golf course playability, and resulting in millions of dollars spent on frequent fungicide applications. Michigan State University scientists observed reduced dollar spot infection in putting greens that were rolled several times weekly. Others observed less incidence of disease in sand-topdressed putting greens. We hypothesized that dollar spot infection in fairways would be decreased by sand topdressing and by rolling thereby reducing the need for frequent fungicide treatments. Two research projects were devised to address the practicality of this disease management strategy. The first project objective was to examine dollar spot severity responses in an Agrostis stolonifera L. and Poa annua L. fairway to varying frequencies of lightweight rolling and to sand topdressing with no fungicide application. Sand topdressing reduced infection by 50%. Cumulative effects of rolling were investigated with the one, three, and five time weekly rolling treatments. The three and five time rolling treatment had significantly less disease compared to the control during the period of dollar spot activity. The second project assessed the effects of different fungicide application rates combined with sand topdressing and lightweight rolling on dollar spot disease in fairway turf. All the fungicide application rates, applied monthly, improved turfgrass quality and normalized difference vegetation index (NDVI) responses compared to the control. Moreover, as rolling frequency increased from 0 to 3x weekly on the no fungicide plots, sand topdressing improved turf quality and reduced dollar spot incidence.
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Title
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The effect of dazomet on accumulated annual bluegrass seed and newly seeded creeping bentgrass
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Creator
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Bravo, Jacob
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Date
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2018
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Collection
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Electronic Theses & Dissertations
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Description
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The Effect of Dazomet on Accumulated Annual Bluegrass Seed and Newly Seeded Creeping BentgrassByJacob S. BravoIn the summers of 2016 and 2017, multiple field experiments were conducted at the Hancock Turfgrass Research Center (HTRC) (Michigan State University, East Lansing, MI) to examine efficacy and post-treatment seeding effects of dazomet on renovated turf surfaces. Two experimental sites were used; a simulated golf course fairway and golf course putting green. This study consisted of two...
Show moreThe Effect of Dazomet on Accumulated Annual Bluegrass Seed and Newly Seeded Creeping BentgrassByJacob S. BravoIn the summers of 2016 and 2017, multiple field experiments were conducted at the Hancock Turfgrass Research Center (HTRC) (Michigan State University, East Lansing, MI) to examine efficacy and post-treatment seeding effects of dazomet on renovated turf surfaces. Two experimental sites were used; a simulated golf course fairway and golf course putting green. This study consisted of two factors. The first factor, dazomet rate, included four levels at the fairway height: 131 lb/acre, 262 lb/acre, 525 lb/acre and a non-dazomet control and 5 levels at the greens height: 65 lb/acre, 131 lb/acre, 196.5 lb/acre, 262 lb/acre, and a non-dazomet control. The second factor, re-seeding interval, consisted of 4 levels: 6, 9, 11 (13 in 2017) and 15 days after dazomet treatment. Both sites were prepped with a glyphosate application followed by aggressive cultivation. Dazomet was applied and incorporated with 1 inch of irrigation. Fairway height plots were sealed using subsequent irrigation while the putting green experiment was sealed with a plastic cover. All plots were re-seeded using 1 lb/M ‘Pure Distinction’ creeping bentgrass (CBG). Data was collected on the number of annual bluegrass plants (ABG) and CBG plants that germinated as well as the percent area covered by CBG and percent area unaffected by the dazomet treatment. Fairway height results showed no negative residual effects on the newly seeded CBG. Control of ABG in fairway height was not considered sufficient, likely due to the lack of an impermeable cover and also due to the incorporation method. The greens height results also suggested no substantial effects on seeded CBG regardless of rate or seeding interval. Greens height data showed desirable control of annual bluegrass, further solidifying the essential function of an impermeable cover.
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Title
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Organically derived weed control methods
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Creator
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Kowalewski, Alexander Robert
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Date
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2006
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Collection
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Electronic Theses & Dissertations
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Description
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Research was conducted at Michigan State University (2004 and 2005) to compare the effects of different mulched maple (Acer species) leaves on broadleaf weeds in established Poa pratensis L. The objectives of this study were to (a) quantify the effectiveness of maple leaf mulch as an organic broadleaf weed control, and (b) identify which species and at what rate provide the most effective control. Experimental design was a RCBD in a 5x2x2+1 factorial, tree leaf species [Acer rubrum L., A....
Show moreResearch was conducted at Michigan State University (2004 and 2005) to compare the effects of different mulched maple (Acer species) leaves on broadleaf weeds in established Poa pratensis L. The objectives of this study were to (a) quantify the effectiveness of maple leaf mulch as an organic broadleaf weed control, and (b) identify which species and at what rate provide the most effective control. Experimental design was a RCBD in a 5x2x2+1 factorial, tree leaf species [Acer rubrum L., A. saccharinum L., A. saccharum M., A. saccharum M. (high sugar content), and Quercus rubra L.], leaf particle size (2.5-6.4 cm² and 1.3 cm²), leaf application rate (0.5-kg m⁻² and 1.5-kg m⁻²) and control, respectively. Results suggest that leaves applied at the 1.5-kg m⁻² rate provided the greatest dandelion (Taraxacum officinale W.) control, up to 80%. Results also suggest A. saccharum M. species provide the greatest dandelion control, up to 81%.
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