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Last updated 8/16/04



2003 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 2003 PDF
Overview of the Turfgrass Science Program PDF


Cultivar and Species Evaluations

1999 NTEP Perennial Ryegrass Test – Final Results PDF
2000 NTEP Kentucky Bluegrass Test – 2003 Results PDF
2001 NTEP Tall Fescue Test – 2003 Results PDF
2002 NTEP Zoysiagrass Cultivar Evaluation – 2003 Results PDF
2002 NTEP Bermudagrass Cultivar Evaluation – 2003 Results PDF


Management Studies

Herbicide Safety on Zoysiagrass Seedlings - 2003 PDF

Creeping Bentgrass Fairway Divot Recovery as Affected by Irrigation Frequency, Cultivar and Divot Mixture Seed Additions: 2003


Evaluation of Foliarly Applied Nutrient Sources, Primer Wetting Agent and Paclobutrazol for Creeping Bentgrass Fairway Management, 2003


Creeping Bentgrass Putting Green Turf Response to Granular and Foliar Nitrogen Programs, 2003


Evaluation of Various Sand Topdressing Practices on Three Creeping Bentgrass Cultivars Maintained Under Two Fertility Levels, 2003


Evaluation of Various Aquatrols Wetting Agents for Suppression of Localized Dry Spot and Hydrophobicity on a Sand-based Rootzone, 2003


Evaluation of Commercially Available Plant Growth Regulator Programs for Creeping Bentgrass Fairway Management, 2003

Kentucky Bluegrass Lawn Turf Response to Three Autumn Applied Urea Sources, 2003 PDF
Nitrogen Fertilizer Programs for Indiana Home Lawns PDF


Integrated Pest Management

Timing of MON 44951 Postemergence Application for Yellow Nutsedge Control PDF
Tall Fescue Control Following Applications of MON 44951 PDF
Efficacy of Mesotrione on Crabgrass PDF

Tolerance of Cool-Season Turfgrass to QuickSilver Alone and in Combination with Other Herbicides

Quicksilver ® (Carfentrazone) for Spring Broadleaf Weed Control PDF
Substitutions for Chlopyralid for Broadleaf Weed Control PDF
Safety of MON 44951 Before and After Seeding of Creeping Bentgrass PDF
Effect of MON 44951 on Creeping Bentgrass and Poa trivialis PDF
Crabgrass Control with Commercially Available and Experimental Products PDF
Efficacy of Acclaim Extra on Crabgrass PDF
Fungicide Selection and Timing for Rhizoctonia Large Patch Control PDF
Evaluation of Fungicides for Control of Brown Patch on Colonial Bentgrass PDF
Survey of Sclerotinia homoeocarpa isolates in Indiana for sensitivity to three fungicides PDF
Evaluation of Fungicide Programs for Disease Control on Creeping Bentgrass Greens PDF
White Grubs Have Unseen Effects on Competition Between Turfgrasses and Dandelions PDF
Purdue University Personnel Affiliated with the Turfgrass Program in 2003 PDF


Send corrections, suggestions, and comments to

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

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