University of Georgia College of Agriculture and Environmental Sciences Department of Crop and Soil Sciences Weed Science Overview

University of Georgia College of Agriculture and Environmental Sciences Department of Crop and Soil Sciences Crop & Soil Sciences Weed Science Stanley Culpepper Tifton Campus 90% Ext., 10% Res. Cotton, vegetables, small grains Timothy Grey Tifton Campus 100% Research Herbicide Fate in Soils, Invasive Weeds, Weed Mgmt. Peanut, Canola Tim Murphy Griffin Campus 74% Ext., 20% Res., 6% Instr. Fine Turf, Roadsides, Forages, Noncropland Eric Prostko Tifton Campus 100% Extension Peanut, Corn, Sunflowers William Vencill Athens Campus 50% Res., 50% Inst. Herbicide Physiology, Weed Mgmt. Cotton

University of Georgia College of Agriculture and Environmental Sciences Department of Crop and Soil Sciences  Weed Science Foci Methyl-Bromide Replacements Glyphosate & ALS-Resistant Palmer amaranth Tropical Spiderwort New Herbicides for Turfgrass Weed Management

University of Georgia College of Agriculture and Environmental Sciences Department of Crop and Soil Sciences METHYL BROMIDE: 400 LBS (98%) NONTREATED CONTROL Phasing out of the marketplace 1999 = 25% reduction 2001 = 25% reduction 2003 = 20% reduction 2005 = gone (reduce methyl bromide ai over time)

University of Georgia College of Agriculture and Environmental Sciences Department of Crop and Soil Sciences Tropical spiderwort infestation, Cairo, GA, Tropical Spiderwort

University of Georgia College of Agriculture and Environmental Sciences Department of Crop and Soil Sciences Glyphosate-Resistant Palmer Amaranth

University of Georgia College of Agriculture and Environmental Sciences Department of Crop and Soil Sciences ALS-resistant pigweed

University of Georgia College of Agriculture and Environmental Sciences Department of Crop and Soil Sciences Turfgrass Weed Management Weed Management in Sod Production Systems New Herbicides for Weed Management in Fine Turf

University of Georgia College of Agriculture and Environmental Sciences Department of Crop and Soil Sciences Invasive Species Chinese Tallow Tropical Soda Apple

University of Georgia College of Agriculture and Environmental Sciences Department of Crop and Soil Sciences Weed Science Research 1.6 Total EFT to research Since 1999, the Weed Science group has published 94 refereed journal articles, 8 book chapters, 259 published abstracts Funding: $2.5 million since 1999 Impact: Research that has lead to critical use exemptions ~$100 million/year and other herbicide registrations have had an economic impact of ~$1.5 million per year Tropical spiderwort has been most troublesome weed in cotton since 2001 with impact of ~$5.6 million per year in increased control costs Glyphosate-resistant Palmer amaranth has the potential to have an economic impact of $20 million per year in cotton alone

University of Georgia College of Agriculture and Environmental Sciences Department of Crop and Soil Sciences Weed Science Extension Cumulative Extension Programming since 1999: Bulletins:18 Research/Extension Public.: 37 Handbook Articles/Updates: 199 Popular Press: 96 Extension Fact Sheets/Circulars: 79 Newsletters: 148 Slide sets: 102 Local County Production Meeting: 438 Extension Agent Training: 83 Extension-Sponsored Programs: 49

University of Georgia College of Agriculture and Environmental Sciences Department of Crop and Soil Sciences

University of Georgia College of Agriculture and Environmental Sciences Department of Crop and Soil Sciences Weed Science Instruction CRSS 4340/6340 – Weed Science – Offered on Athens & Tifton campus ENTO(CRSS)(PATH) 4250/6250 – Transgenic Crops & Pesticide Utilization – Offered on Athens & Tifton campus ENTO(CRSS)(PATH) 4740/6740 – Integrated Pest Management – Offered on Athens & Tifton campus CRSS(ENTO)(PATH) 3500 – Turfgrass Pest Management – Athens campus CRSS 6360 – Weed Science Field Trip CRSS 8330 – Herbicide Physiology PHRM 8930 – Chemical Toxicology

University of Georgia College of Agriculture and Environmental Sciences Department of Crop and Soil Sciences Weed Science Instruction Graduate Students: Currently: 1 Ph.D.; 3 M.S. Since 1999: –3 Ph.D. students –7 M.S. students –4 M.P.P.P.M. students

University of Georgia College of Agriculture and Environmental Sciences Department of Crop and Soil Sciences