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B-821
2002 Annual Report
Purdue University Turfgrass Science Program
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 2002 | |
| Overview of the Turfgrass Science Program | |
Cultivar and Species Evaluations |
|
| 1998 NTEP Creeping Bentgrass Cultivar Test (Fairway) - 2002 Results | |
| 1998 NTEP Fine-leafed Fescue Cultivar Test (Lawn) - 2002 Results | |
| 1999 NTEP Perennial Ryegrass Cultivar Test (Lawn) - 2002 Results | |
| 2000 NTEP Kentucky Bluegrass Cultivar Test (Lawn) - 2002 Results | |
| 2001 NTEP Tall Fescue Cultivar Test (Lawn) - 2002 Results | |
| 2002 NTEP Zoysiagrass Test - 2002 Results | |
| 2002 NTEP Bermudagrass Test - 2002 Results | |
Management Studies |
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| Water Quality Management on Purdue's Kampen Golf Course | |
| Defining Optimum Seeding Rate for Bermudagrass and Zoysiagrass | |
| Turf Conversion Using Seeded Zoysia and Bermuda Without Nonselective Herbicides | |
| Large Scale Fairway Conversion Using Seeded Zoysiagrass | |
| Herbicide Safety on Zoysia Seedlings - 2002 | |
| Safety of Dimension 1EC on Seedling Creeping Bentgrass or Tall Fescue - 2001 and 2002 Results | |
| Effects of Dimension 1EC on Creeping Bentgrass Establishment and Poa annua Competition During Fall Fairway Renovation | |
Integrated Pest Management |
|
| RRCB Control Alternatives Screening Trial with Current Standards and Additional Candidates | |
| Fluroxypyr/Triclopyr as a Confront Replacement | |
| Safety of Eagle Fungicide on Creeping Bentgrass | |
| Evaluation of Nonselective Liquid Fastburn Formulations | |
| Carfentrazone Efficacy on Ground Ivy and Canada Thistle in Cool-Season Turfgrass | |
| Tolerance of Cool-Season Turfgrass to Carfentrazone | |
| Evaluation of MON 44951 75WDG and Other Herbicides Applied Spring to Summer for Poa trivialis Control | |
| Evaluation of MON 44951 75WDG and Other Potential Poa trivialis Herbicides Applied Spring to Summer for Safety to Creeping Bentgrass | |
| Control of Crabgrass with Preemergence Herbicides - 2002 | |
| Cultural and Chemical Control of Ground Ivy | |
| Ground Ivy Population Respond Differently to 2,4-D or Triclopyr | |
| 2,4-D Rate Response, Absorption, and Translocation of Two Ground Ivy Populations | |
| Epidemiology of Gray Leaf Spot of Perennial Ryegrass | |
| Survey of Sclerotinia homoeocarpa Isolates in Indiana for Sensitivity to Three Fungicides | |
| Evaluation of Fungicides for Control of Dollar Spot on Creeping Bentgrass - 2002 | |
| Japanese Beetle Flight Activity | |
| Purdue University Personnel Affiliated with the Turfgrass Program in 2002 |
Send corrections, suggestions, and comments to biehlj@purdue.edu
Department of Agronomy, Turf Program
915 W. State Street, West Lafayette, IN 47907
765-494-8039
Send corrections, suggestions, and comments to biehlj@purdue.edu