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Last updated 8/2/05



2004 Annual Report

Purdue University Turfgrass Science Program


Department of Agronomy
915 W State St
Purdue University
West Lafayette IN 47907-2054


In this report, you may see pesticide use in research reports that do not conform to the pesticide label. These uses are not provided as recommendations. By law, it is the responsibility of the pesticide applicator, to follow current label directions for the specific pesticide being used. No endorsement is intended for products mentioned, nor criticism of products not mentioned. The authors, Purdue University, and the Midwest Regional Turf Foundation assume no liability from misuse of pesticide applications detailed in this report. The Agricultural Experiment Station of Purdue University is an equal action/equal opportunity institution.

Understanding the Data

Most of the data presented in this report was subjected to statistical analysis. Statistical procedures are a combination of logic and arithmetic that allow us to interpret information gathered from experiments. We most frequently use a Least Significant Difference Test to explain our test data.

Fisher’s Least Significant Difference (LSD) Test is a statistical procedure that determines if the difference found between two treatments is due to the treatment or if the difference is simply due to random chance. For each set of data, a value termed the LSD is calculated at a chosen level of significance. If the difference between two treatment means is greater than this calculated value then it is said to be a ‘significant difference’ or a difference not due to random chance. The level of significance that we use most often is 0.05 (LSD0.05). In other words, this difference will occur 95% of the time these treatments are compared. If ‘NS’ is reported at the bottom of a column of means, then no significant difference was found among the means in this group of data at a probability = 0.05.


Table of Contents:

Supporters of the Purdue University Turf Program in 2004 PDF
Overview of the Turfgrass Science Program PDF

Cultivar and Species Evaluations

2000 NTEP Kentucky Bluegrass Test – 2004 Results PDF
2001 NTEP Tall Fescue Test – 2004 Results PDF
2003 NTEP Bentgrass (Fairway/Tee) Test – 2004 Results PDF
2003 NTEP Bentgrass Putting Green Turf Cultivar Evaluation – 2004 Results PDF
2003 NTEP Fineleaf Fescue Test – 2004 Results PDF
2004 NTEP Perennial Ryegrass Test – 2004 Results PDF
2002 NTEP Bermudagrass Cultivar Evaluation – 2004 Results PDF
2002 NTEP Zoysiagrass Cultivar Evaluation – 2004 Results PDF
Low Input Sustainable Turfgrass Trial PDF

Management Studies

Establishment Rates of Zoysiagrass Cultivars PDF
Nitrogen Fertilization Effects on Three Lawn Species in Indiana PDF
Seedling Establishment of Three Primary Cool-Season Turfgrass Species as Affected by Four Urea-based Nitrogen Fertilizer Products PDF
Annual Bluegrass Control in Creeping Bentgrass Fairway Using Cutless 80W, Primo MAXX 1EC and Various Tank-Mix Combinations PDF
Evaluation of Ethephon (Proxy) and Trinexapac-ethyl (Primo MAXX) Combinations for Suppression of Annual Bluegrass Seedheads on a Golf Course Putting Green PDF
Evaluation of Various Aquatrols Wetting Agents and Flutalonil for Suppression of Localized Dry Spot on a Sand-based Rootzone PDF
Characterization of Sand materials for Golf Course Bunker Use, 2004 PDF
Evaluation of Various Sand Topdressing Practices on Three Creeping Bentgrass
Cultivars Maintained Under Two Fertility Levels
Summary of Research on Selective Poa trivialis Control PDF

Integrated Pest Management

Herbicide Safety on Zoysiagrass Seedlings – 2004 PDF
Postemergent Control of Poa annua with GOLTIX PDF
Tolerance of Zenith Zoysiagrass Seedlings t QuickSilver PDF
Preemergent Control of Poa annua with GOLTIX PDF
Tolerance of Cool-season Grasses to Formulations of Prodiamine PDF
Prodiamine Tank-mix Study PDF
Kentucky Bluegrass Mitigation in Golf Course and Commercial Turf PDF
Peradigm Safety on Creeping Bentgrass PDF
Overseeding Creeping bentgrass Before or After Application of MON 44951 PDF
Annual Grass Control with Experimental and Commercially Available Products PDF
Mestrione: Bentgrass Removal in Cool-season Turfgrass PDF
Mesotrione Application Timing for Bentgrass Control PDF
Potential of Mesotrione to Control Dallisgrass PDF
Mesotrione: Nimblewill Control in Turfgrass PDF
Overseeding Creeping Bentgrass Following Summer – Applied MON 44951 PDF
Postemergence Control of Creeping Bentgrass with Fall Applications of MON 44951 PDF
Effect of Herbicide and Application Date on Ground Ivy Control PDF
Tolerance of Seedling Bentgrass to Quicksilver PDF
Timing of MON 44951 Applications in the Fall for Creeping Bentgrass Control – 2003 PDF
MON 44951 Screen on Various Poa Trivialis Cultivars PDF
Fungicide Selection and Timing for Rhizoctonia Large Patch Control PDF
Evaluation of Fungicides for control of Dollar Spot on Creeping Bentgrass, 2004 PDF
Evaluation of Fungicides for Control of Dollar Spot on Creeping Bentgrass Fairways, 2004 PDF
Evaluation of fungicides for Control of Brown patch on Colonial Bentgrass, 2004 PDF
2004 White Grub Control Evaluation PDF
Billbugs Facilitate Weed Invasion in Lawns PDF
Purdue University Personnel Affiliated with the Turfgrass Program in 2004 PDF


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Department of Agronomy, Turf Program
915 W. State Street, West Lafayette, IN 47907

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