NOT FOR PUBLICATION WITHOUT PERMISSION

2008-B18313

2007 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 2007
Overview of the Turfgrass Science Program
PDF

 

Abiotic Stress Physiology

 
Towards Association mapping of drought tolerance in perennial ryegrass
Biomass, cell wall components and gene expressions of switchgrass in response to Water deficit conditions
Turfgrass drought stress management utilizing canopy temperature and multispectral approaches
Annual bluegrass suppression in a creeping bentgrass fairway utilizing various application rates, timings and combinations of paclobutrazol, trinexapac-ethyl and prodiamine.

 

Cultivar and Species Evaluations

2003 NTEP Bentgrass Putting Green Test – 2007 Results

2003 NTEP Bentgrass (Fairway/Tee) Test – 2007 Results
2003 NTEP Fineleaf Fescue Test – 2007 Results
2004 NTEP Perennial Ryegrass Test – 2007 Results
2005 NTEP Kentucky Bluegrass Test – 2007 Results
2006 NTEP Tall Fescue Test – 2007 Results

 

Management Studies

Evaluation of novel topdressing brush technology
Creeping bentgrass golf ballmark recovery as affected by various tools
Evaluation of various establishment techniques to reduce sediment and runoff loss
Root anaerobic metabolisms and gene expressions of Kentucky bluegrass in response to short-term waterlogging alone and in combination with high temperatures
Effect of season-long fungicide programs on survival of Poa trivialis

 

Insect Management

Curative efficacy of three different Dylox formulations against Japanese beetle larvae in Kentucky bluegrass turf
Efficacy of Dinotefuran applied preventively against billbugs in Kentucky bluegrass turf
Efficacy of Meridian applied at optimal and late timing against white grubs in Kentucky bluegrass turf
Efficacy of several Thiamethoxam formulations applied in early April against white grubs in Kentucky bluegrass turf
Efficacy of several Thiamethoxam formulations applied in May against white grubs in Kentucky bluegrass turf
Influence of application rate on efficacy of Chlorantraniliprole applied in early April against white grubs in Kentucky bluegrass turf
Influence of application rate on efficacy of Chlorantraniliprole applied in early May against white grubs in Kentucky bluegrass turf
Influence of application rate on the efficacy of Chlorantraniliprole applied preventively against billbugs in Kentucky bluegrass turf
Influence of dose and application timing on the efficacy of Merit against Japanese beetle larvae in Kentucky bluegrass turf
Influence of novel formulations of Chlothianidin against billbugs in Kentucky bluegrass turf
Curative efficacy of insecicides against billbugs in Kentucky bluegrass turf
PDF

 

Weed Management

Certainty or Velocity to control seedling Poa trivialis in seedling creeping bentgrass:  Fall applications
Certainty or Velocity to control seedling Poa trivialis in seedling creeping bentgrass:  Spring applications
Overseeding creeping bentgrass before or after application of Certainty
Turflon to reduce zoysiagrass seedling injury to Acclaim or Fusilade when applied to suppress/control bermudagrass contamination
Program with Tenacity for bentgrass removal and overseeding in Spring
Dimension and Barricade granular Fall/Spring timing study
Tall fescue control in Kentucky bluegrass with Certainty
QP Dithiopyr verses Dimension for preemergence crabgrass efficacy
Knotweed control using Tenacity
Tenacity safety on Poa trivialis
Tenacity 4SC potential for tracking
Tenacity combined with other herbicides for control of ground ivy
Quackgrass control in Kentucky bluegrass with sequential applications of Certainty
Effect of Certainty and Velocity on cultivars of roughstalk bluegrass
Iron and nitrogen with Certainty or Velocity on control roughstalk bluegrass and phytotoxicity to creeping bentgrass
Certainty and Velocity combined with overseeding creeping bentgrass for conversion on fairways
Purdue University Personnel Affiliated with the Turfgrass Program in 2007

 


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