2004 GEORGIA COTTON
RESEARCH AND EXTENSION REPORTS

Edited by Philip Jost, Phillip Roberts, and Robert C. Kemerait
Compiled by Debbie Miracle

Georgia Agricultural Experiment Stations
Georgia Cooperative Extension Service
University of Georgia College of Agricultural and Environmental Sciences

The Georgia Cotton Research and Extension Work Group would like to graciously thank the following for their support of cotton research and education in Georgia:

• The Georgia Agricultural Commodity Commission for Cotton
• Cotton Incorporated
• The Cotton Foundation

SUPPORTERS

The Georgia Cotton Research and Extension Work Group would also like to thank the following for their continued support of cotton research and education in Georgia:

TABLE OF CONTENTS

INTRODUCTION

• The 2004 Crop Year In Review

AGRICULTURE AND APPLIED ECONOMICS

• Economic Analysis of Southern Root Knot Nematode Controls
• Economics of Managing Seedling Disease: Some Examples from Georgia Experience
• Yield, Quality, Costs, and Net Returns: Three-Year Summary Comparing Conventional and Transgenic Cotton Varieties

ANIMAL AND DAIRY SCIENCES

• Effects of Feeding Whole Cottonseed Coated with Starch, Urea, or Yeast on Performance of Lactating Dairy Cows
• Feeding Value of Whole Fuzzy Cottonseed with Elevated Concentrations of Free Fatty Acids

BIOLOGICAL AND AGRICULTURAL ENGINEERING

• Effects of Variable-Rate Sprinkler Cycling on Irrigation Uniformity
• Application of Weather Data for Management of Cotton Production in 2004
• Cotton Growth and Development Monitoring During 2004

CROP AND SOIL SCIENCES

• Physiology of Benghal Dayflower (Commelina Benghalensis), a New Invasive Weed of the Southeastern USA
• Can Growers Effectively Manage Tropical Spiderwort in Cotton?
• Does Glyphosate Plus Staple or Envoke Applied Topically to Roundup Ready Cotton Impact Fruit Set or Seed Yield?
• Managing Tropical Spiderwort (Commelina Benghalensis) in a Twenty-Four Acre On-Farm Cotton Trial
• Evaluation of Conservation Tillage Options in Terrell County
• Sulfur Nutrition for Cotton in the Southeast
• Pedigree-Vs. RFLP-Based Genetic Similarity Estimates in Cotton
• Yield, Quality and Profitability of Cotton Produced with Subsurface Drip Versus Overhead Sprinkler Irrigation Systems
• Yield, Quality and Fruit Distribution in BGII/RR Flex and BG/RR Cottons Exposed to Excessive Glyphosate Applications, Fruit Loss, and Water Deficit Stress
• Cotton Irrigation Timing Using Remote Sensing
• Juvenile Growth Defoliation with Ethephon Products
• Comparison of Ethephon Containing Boll Openers
• Plant Growth Regulator Effects on Lint Quality and Yield
• Large Block Variety Trials at Southwest Georgia Research and Education Center
• Plant Population Studies with DP 555 BG/RR
• Replanting Skippy Stands
• 2004 Cotton Variety Trials

ENTOMOLOGY

• Pesticide Effects on Insect Natural Enemies of Cotton Pests
• Effects of Insecticide Treatments on the Cotton Aphid in Cotton
• Parasitism of Soybean Loopers, Pseudoplusia Includens, by Copidosoma Floridanum in Bollgard and Non-BT Cotton
• Effects of Insecticide Treatments on Phytophagous Stink Bugs and Big-Eyed Bugs in Cotton
• Effects of Insecticidal Treatments on Thrips Abundance, Cotton Growth and Yield in South Georgia
• Insecticide Resistance Monitoring in Lepidopteran Cotton Pests
• The Effect of Stink Bug Damage on Fiber Quality
• Effect of Aphid Control on Short and Full Season Varieties in Irrigated and Dryland Environments
• Evaluation of Dimilin for Grasshopper Control
• Evaluation of At-Plant Thrips Insecticides and Effects of Planting Date on Thrips Infestations in Seedling Cotton

PLANT PATHOLOGY

• Evaluation of Dicrotophos and Thiophanate Methyl for Management of Hardlock of Cotton in Georgia
• Assessment of Nematicides for Management of the Southern Root-Knot Nematode, Meloidogyne Incognita, in Georgia
• Fungal Fermentation Products for Control of Root-Knot Nematodes

INDEX

• List of Authors