NOT FOR PUBLICATION WITHOUT PERMISSION
2008 Annual Report
Purdue University Turfgrass Science Program
Department of Agronomy
915 W State St
Purdue University
West Lafayette IN 47907-2054
765-494-8039
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 2008 |
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Abiotic Stress Physiology |
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| Correlations of Leaf Relative Water Content, Canopy Temperature, and Spectral Reflectance in Perennial Ryegrass Under Water Deficit Conditions | |
| Towards Association Mapping of Drought Tolerance in Perennial Ryegrass | |
Cultivar and Species Evaluations |
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| 2004 NTEP Perennial Ryegrass Test – 2008 Results | |
| 2003 NTEP Fineleaf Fescue Test | |
| 2003 NTEP Bentgrass (Fairway/Tee) Test | |
Management Studies |
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| Precision Products Sand-based Rootzone Localized Dry Spot Rescue Trial -2008 | |
Insect Management |
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| Influence of Application Rate and Formulation on Efficacy of Chlorantraniliprole (acelepryn) Applied Preventively Against Japanese Beetle Larvae in Kentucky Bluegrass Turf | |
| Influence of Application Rate and Timing on the Efficacy of Acelepryn Applied Preventively Against Billbugs in Kentucky Bluegrass Turf | |
| Residual Efficacy of Chlorantraniliprole (Acelepryn) Against Black Cutworm Larvae in Creeping Bentgrass Turf | |
| Curative Efficacy of Dylox and Arena Insecticides Applied as Rescue Treatments Against Masked Chafer Larvae in Kentucky Bluegrass Turf | |
| Influence of Formulation and Dosage on the Efficacy on Arena Against First Instar Japanese Beetle Larvae in Kentucky Bluegrass | |
Weed Management |
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| Albaugh quinclorac comparison | |
| BASF herbicide efficacy trial | |
| Dimension & Barricade Granule Fall/Spring Timing Study | |
| Post broadleaf weed efficacy in cool season turgrass with combinations of quinclorac and triclopyr |
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| Certainty or Velocity to control seedling Poa trivialis in seedling creeping bentgrass: Spring 2008 | |
| Certainty or Velocity to control seedling Poa trivialis in seedling creeping bentgrass: Fall 2008 | |
| Turflon to reduce zoysiagrass seedling injury to Acclaim or Fusilade when applied to suppress/control bermudagrass contamination | |
| Effect of adding iron and N to Velocity or Certainty on five species of cool-season | |
| Seasonal environmental factors affecting Poa trivialis physiology | |
| Two applications of Certainty or Velocity to control seedling Poa trivialis in seedling creeping bentgrass | |
Disease Management |
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| Evaluation of fungicides for control of dollar spot on creeping bentgrass, 2008 | |
| Interaction of biofungicides and chlorothalonil for control of dollar spot on creeping bentgrass, 2008 | |
Evaluation of fungicides for control of brown patch on colonial bentgrass, 2008 |
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| Influence of initial disease severity on performance of chlorothalonil for dollar spot control |
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