2008 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 2008

Abiotic Stress Physiology

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

2004 NTEP Perennial Ryegrass Test – 2008 Results


2003 NTEP Fineleaf Fescue Test PDF
2003 NTEP Bentgrass (Fairway/Tee) Test PDF

Management Studies

Precision Products Sand-based Rootzone Localized Dry Spot Rescue Trial -2008 PDF

Insect Management

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

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
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 PDF
Two applications of Certainty or Velocity to control seedling Poa trivialis in seedling creeping bentgrass PDF

Disease Management

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 PDF
Evaluation of fungicides for control of brown patch on colonial bentgrass, 2008
Influence of initial disease severity on performance of chlorothalonil for dollar spot control PDF


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

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