2010 WEED MANAGEMENT EXPERIMENTS
COTTON; VEGETABLES; WHEAT

Dr. A. Stanley Culpepper
Professor and Extension Weed Specialist
University of Georgia
Department of Crop and Soil Sciences
Tifton, GA



INTRODUCTION

The experiments summarized in this report are designed to develop data to support extension weed management recommendations for cotton, small grains, and vegetables. Additionally, these experiments demonstrate new and/or proven management practices to growers, county extension agents, agribusiness personnel, and other extension specialists.

Replicated experiments are established for specific needs and are located on university stations or private farms. The experiments are a joint effort of the University of Georgia Extension personnel, county extension personnel, cooperating research personnel, and cooperating growers. Many commodity organizations and chemical companies provide support of these experiments.

This publication contains results of use patterns of herbicides, some of which may not be registered for the particular use. Such results are included for informational purposes only and should not be taken as recommendations for use. Additionally, the University of Georgia does not guarantee nor warrant the standards of the products, nor do they imply approval of the products to the exclusion of others which may be similarly effective.

Questions or comments concerning this report may be directed to the author:

Dr. A. Stanley Culpepper
229-386-3328
stanley@uga.edu




CONTRIBUTORS

This research could not have been conducted without the support of the following individuals or organizations:

County Extension Agents Commodity Organizations Industry
Aquatrols, BASF, Bayer CropScience, Brandt, Cheminova, Dow AgroSciences, DuPont, Helena, Lab Services, Makhteshim Agan, Monsanto, Nova Source, Syngenta, UPI, Valent

University of Georgia
Research Stations:
Attapulgus Research Station, Plains Research Station, Ponder Farm Research Station
Technicians:
Jessica Daniels, Jess Parker, Tim Richards
Post Doctorial Research Associate:
Lynn Sosnoskie
Data Entry:
Leanne Chafin
Student Workers:
April Richards, Jenna Smith, Ansley Burgess



TRIALS

Cotton
C1-10 Response of primrose and other winter weeds to numerous glyphosate formulations.
C2-10 Impact of deep tillage, cover crop, and herbicide program on the control of glyphosate-resistant Palmer amaranth. (YEAR 2)
C3-10 Impact of deep tillage, cover crop, and herbicide program on the control of glyphosate-resistant Palmer amaranth. (YEAR 1)
C4-10 Palmer amaranth seed return as impacted by weed management program.
C5-10 Safening cotton injury from glyphosate + Dual, glyphsoate + Staple, Ignite or glyphosate + MON 64310 mixtures applied over PHY 375 WRF.
C6-10 PHY 375 WRF cotton response to Ignite systems.
C7-10 Cotton response to 2,4-D or Direx applied 1 d prior to planting.
C8-10 Cotton response to Edition and Nimble applied preplant burndown for cotton.
C9-10 Cotton response to Edition and Nimble applied preplant burndown for cotton.
C10-10 GR Palmer amaranth and cotton response to Valor based systems.
C11-10 GR Palmer amaranth and RR cotton response to MON 63410 systems.
C11B-10 GR Palmer amaranth and RR cotton response to MON 63410 systems.
C12-10 GR Palmer and cotton response to MON 63410 systems.
C13-10 Impacts of HM9679A on the control of GR Palmer amaranth by residual herbicides.
C14-10 Weed response to ET preplant burndown applications.
C15-10 GR Palmer amaranth response to Dawn herbicide.
C16-10 GR Palmer amaranth and Widestrike response to Staple/Ignite systems.
C17-10 GR Palmer amaranth management programs with Staple/Direx/Valor systems.
C18-10 GR Palmer amaranth response to glyphosate/glufosinate alone or mixed with Wetcit
C19-10 GR Palmer amaranth response to Ignite applied at 3 inches.
C20-10 GR Palmer amaranth response to Ignite applied at 9 inches.
C21-10 GR Palmer amaranth response to Ignite applied at 6 inches.
C22-10 GR Palmer amaranth response to Ignite applied at 12 inches.
C23-10 GR Palmer amaranth response to dicamba formulations and 2,4-D.
C24-10 PHY 375 WRF cotton response to Ignite mixtures applied topically.
C25-10 Can Basagran Safen PHY 375 WRF cotton to Ignite?
C30-10 GR Palmer (2-4 inch) response to 2,4-D.
C31-10 GR Palmer (12 inch) response to 2,4-D.
C32-10 GR Palmer (6-8 inch) response to 2,4-D.
C33-10 GR Palmer (5-6 inch) response to 2,4-D and dicamba.
C34-10 GR Palmer (10-12 inch) response to 2,4-D and dicamba.
C35-10 Weed response to ET preplant burndown applications.
C36-10 Managing GR Palmer amaranth in LL and RR cotton.
C37-10 Managing Palmer amaranth with Ignite plus Cotoran systems.
C39-10 GR Palmer amaranth response to layby mixtures with Layby Pro or Direx.
C40-10 Response of GR Palmer amaranth, grasses, and other broadleaf weeds to 2,4-D, DHT-014, and Clarity alone or mixed with Ignite.
C41-10 Texas panicum response to clethodim or Ignite alone or mixed with adjuvants.
C42-10 Glytol/LL cotton and goosegrass response to glufosinate/glyphosate mixtures.
C43-10 Response of summer annual weeds to various glyphosate formulations.
C44-10 Impact of tillage on cotton injury and Palmer amaranth by Reflex.
C47-10 Cotton and weed response to directed herbicide applications.
C48-10 GR Palmer amaranth response to layby mixtures with and without ET.
C49-10 Cotton and weed response to Pyrimax PRE systems.
C50-10 Effects of HM9679A on control of various weeds by residual herbicides.
C51-10 Cotton and weed response to diuron, prometryn, and fluometuron mixtures PRE.
C52-10 Cotton and weed response to Reflex, Diuorn, and Cotoran combinations.
C53-10 Cotton response to MON 63410 and Dual Mag. applied PRE, cot., 3 leaf or 8 leaf.
C54-10 Cotton response to glyphosate plus Staple plus Dual or MON 63410.
C55-10 Palmer amaranth response to weed management systems with Ignite applied at 10, 15, or 20 GPA.
C59-10 Tropical spiderwort response to MON 63410 and Dual Magnum.
C60-10 GR Palmer amaranth response to layby mixtures with and without ET.
C61-10 GR Palmer amaranth response to Ignite applied at 6 inches.
C62-10 Mixed Population of GR Palmer (2-4 inch) response to 2,4-D.
C63-10 GR Palmer amaranth response to Ignite applied at 5 inches.
C64-10 Mixed Population of GR Palmer (6-8 inch) response to 2,4-D.
C65-10 GR Palmer (5-6 inch) response to 2,4-D and dicamba.
C66-10 Widestrike cotton response to Ignite alone or mixed with various adjuvants.
C67-10 GR Palmer response to Weedar/Callisto/Durango/Ignite.
C68-10 GR Palmer response to Weedar/Callisto/Durango/Ignite.
C69-10 Palmer response to Reflex, Staple, Direx, and Reflex + Staple applied PRE or PPI in a very dry soil.
C70-10 GR Palmer amaranth response to diuron + MSMA + Valor mixtures.


Vegetables
Veg1-10 Transplant bareground cantaloupe response to Reflex, Sinbar, and Dual Magnum applied preplant or directed.
Veg2-10 Determining plant back intervals with Paladin Pic, WSP and MB.
Veg3-10 Transplant mulched pepper and tomato response to Reflex applied preplant or directed.
Veg4-10 Sweet corn and weed reponse to Atrazine mixed with Laudis, Accent, Steadfast, and Callisto.
Veg5-10 Sweet corn and weed response to Laudis weed management programs and carryover potential to a second crop broccoli or cucumber.
Veg6-10 Pepper and weed response to Paladin Pic alone or in a system with Devrinol and/or Dual Magnum
Veg7-10 Nutsedge and pepper response to Pic Chlor 60, WSP (co-application) and the UGA 3-WAY.
Veg9-10 Watermelon and weed response to WSP and Paladin + Pic.
Veg10-10 Nutsedge and watermelon response to BayFilm and standard biodegradable mulches.
Veg11-10 Bareground seeded squash and watermelon response to Reflex, Sinbar, and Dual.
Veg12-10 Mulch degradation in a spring cantaloupe crop.
Veg13-10 Fruiting vegetable and curcurbit resposne to Devrinol applied under mulch.
Veg13B-10 Fruiting vegetable and curcurbit resposne to Devrinol applied under mulch.
Veg13C-10 Fruiting vegetable and curcurbit resposne to Devrinol applied under mulch.
Veg15-10 Cucumber, squash, and pepper response to Devrinol drip injected.
Veg18-10 Transplant watermelon tolerance to Reflex, Sinbar, and Curbit.
Veg19-10 GAT recropping to vegetables, tobacco, and peanut.
Veg19B-10 GAT recropping to vegetables and tobacco.
Veg20-10 Tomato and pepper response to 2,4-D and dicamba simulated drift rates.
Veg21-10 Watermelon and cantaloupe response to 2,4-D and dicamba simulated drift rates.
Veg23-10 Transplant watermelon response to Dual Magnum and Sandea applied POST in mulch and bareground systems.
Veg25-10 Weed & crop response to mixtures of Valor, Classic, Firstrate, Classic, Harmony, Purusit, Fristrate, Authority, Sencor and V-10206.
Veg26-10 Bell pepper and weed response to the most effective MB alternatives.
Veg27-10 Tomato and weed response to the most effective MB alternatives.
Veg29-10 Tomato and pepper response to 2,4-D and dicamba simulated drift rates.
Veg30-10 Tomato and pepper response to Dual Magnum applied POST.
Veg31-10 Large crabgrass response to quizalofop and clethodim applied POST
Veg31B-10 Annual grass response to quizalofop and clethodim applied POST
Veg32-10 Miscanthus response to potential postemergence herbicides.
Veg33-10 Determine if IrrigAid Gold improves the movement of metam through the drip line
Veg34-10 Collard and squash response to several formulations and applications of Devrinol
Veg35-10 Carrot response to Dual Magnum applied POST.
Veg36-10 Squash and cucumber response to 2,4-D and dicamba simulated drift rates.


Wheat
Wheat1-10 Wheat and ryegrass response to Axial, Hoelon, Osprey, and PowerFlex. NA09C2B049
Wheat3-10 Wheat and ryegrass response to Axial, Axiom, Osprey, and PowerFlex systems. NA09C2B050
Wheat4-10 Wheat and ryegrass response to systems with Axiom, Osprey, and Atlantis. HP10NARAHI
Wheat7-10 Wild radish and wheat response to Harmony/ET mixtures.
Wheat8-10 Winter weed response to Harmony/ET mixtures.
Wheat9-10 Winter weed response to Harmony Total Sol, Nimble, and Report Extra.




PESTICIDE PRECAUTIONS

ATTENTION ! Pesticide Precautions
  1. Observe all directions, restrictions, and precautions on pesticide labels. It is dangerous, wasteful, and illegal to do otherwise
  2. Store all pesticides in original containers with labels intact and behind locked doors. “KEEP PESTICIDES OUT OF REACH OF CHILDREN.”
  3. Use pesticides at correct label dosages and intervals to avoid illegal residues or injury to plants and animals.
  4. Apply pesticides carefully to avoid drift or contamination of non-target areas.
  5. Surplus pesticides and containers should be disposed of in accordance with label instructions so that contamination of water and other hazards will not result.
  6. Follow directions of the pesticide label regarding restrictions as required by State an Federal Laws and Regulations
  7. Avoid any actions that may threaten an Endangered Species of its habitat. Your county extension agent can inform you of Endangered Species in your area, help you identify them and through the Fish and Wildlife Office, identify actions that may threaten Endangered Species of their habitat.