Last updated 6/9/99


1998 Annual Report

Purdue University Turfgrass Science Program


In this book, you may see pesticide use in research reports that do not conform to the pesticide label. These uses are not provided as recommendations. It is the responsibility of the pesticide applicator, by law, 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 1998 HTML PDF
Overview of the Turfgrass Science Program HTML PDF
1997 USGA/GCSAA/NTEP Creeping Bentgrass Test HTML PDF
1995 NTEP Kentucky Bluegrass Test HTML PDF
1996 NTEP Zoysiagrass Test HTML PDF
1997 NTEP Bermudagrass Cultivar Evaluation HTML PDF
Leaf Mulching Effects on Turf Performance HTML PDF
Water Quality Management of Purdue's Kampen Golf Course HTML PDF
Detecting the Effects of Fungicides on Soil Bacteria Populations Using Denaturing Gradient Gel Electrophoresis (DGGE) HTML PDF
The Ecological Impact of Introducing a Foreign Organism into the Turfgrass Ecosystem HTML PDF
Determining the Environmental Fate of the Biological Control Organism Pseudomonas aureofaciens through 16SrDNA Gene Probing HTML PDF
Pre and Postemergence Control of Crabgrass HTML PDF
Preemergence Crabgrass Control - 1998 HTML PDF
Preemergence Crabgrass Control 1992-1997 HTML PDF
Postemergence Control of Crabgrass 1994-1998 HTML PDF
Postemergence Control of Crabgrass - 1998 HTML PDF
Postemergence Broadleaf Weed Control - 1998 HTML PDF
Poa trivialis Control with Combinations of Pesticides and Several Application Timings HTML PDF
Phytotoxic Response of Fairway Creeping Bentgrass to Combinations of Pesticides and Several Application Timings HTML PDF
Evaluation of Fungicides for Control of Dollar Spot, Brown Patch and Turf Quality of Creeping Bentgrass HTML PDF
Use of Biological Control Agents for Managment of Dollar Spot on Creeping Bentgrass HTML PDF
Influence of Spray Volume on Performance of Contact and Systemic Fungicide HTML PDF
Management of Take-all Patch of Creeping Bentgrass on Greens Constructed to USGA Specifications HTML PDF
Effect of Mach 2 (halofenozide) on Natural Parasitic Nematode in the Soil HTML PDF
Evaluation of Various Chemical Treatments for Control of White Grubs On Turfgrass HTML PDF
Purdue University Personnel Currently Affiliated with the Turfgrass Program HTML PDF


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