2014 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:

Technical Support County Extension Agents Lewis Taylor Farms University of Georgia Research Stations Sunbelt Expo Commodity Organizations Industry
AmVac, Arkema, BASF, Bayer CropScience, Dow AgroScience, DuPont, FMC, Makhteshim Agan, Monsanto, Nufarm, Syngenta, Valent, Winfield Solutions




TRIALS

Cotton
C1-14Winter weed burndown with NUP-13007.
C2-14 Winter weed burndown with NUP-13007.
C3-14 Cotton response to Valor or Fierce applied preplant in rye, weeds, or in conventional systems.
C4-14 Cotton tolerance to Zidua directed at 5 leaf, square, or flower.
C5-14 Cotton and weed response to PRE herbicide mixtures.
C6-14 Evaluating fluridone/fomesafen mixtures PRE for weed control & injury.
C7-14 Single POST systems following fluridone PRE.
C8-14 Liberty-based systems without a layby.
C9-14 Cotton Injury from 4-Way Mixes Including Orthene.
C10-14 Length of residual control by cotton herbicides applied PRE.
C11-14 GR Palmer amaranth and cotton response to the addition of NanoBoost with Liberty or Roundup mixtures.
C12-14 Developing the most economically effective Brake F2 system in RR cotton.
C12B-14 Developing the most economically effective Brake F2 system in cotton.
C13-14 Comparison of heavy rye and conventional cotton systems.
C20-14 Determining the most effective POST option for the control of Palmer amaranth in DGT cotton.
C21-14 Impact of droplet size on Liberty, Clarity, and/or Weedar.
C24-14 Cotton and weed response to residual at-plant herbicides applied PRE.
C25-14 Planting practice influences weed control and yield.
C26-14 Influence of V-10389 on Valor PRE in cotton.
C27-14 Counter by PRE herbicide interaction AMVAC protocol 14C041070
C28-14 Counter by POST herbicide interaction AMVAC protocol 14C0410
C28B-14 Influence of Counter on Staple POST on cotyledon cotton.
C29-14 PHY 499 WRF cotton response to Lifeline applied topically.
C30-14 Increased crop tolerance with flumioxazin in cotton.
C32-14 Cotton and weed response to Anthem Flex preplant or PRE.
C33-14 Cotton safening of Reflex by adding fluridone.
C35-14 Burndown of winter weeds using Linex, Valor, and/or Direx.
C36-14 Liberty + Staple mixtures overtop of WRF cotton.
C38-14 Application time of day influence on Gramoxone, Direx, and Liberty.
C39-14 Application time of day influence on Roundup, Reflex, and Clarity.
C40-14 Impact of cover and tillage on cotton resposne to Fierce.
C43-14 Comparing residual cotton herbicides for injury and weed control.
C44-14 Developing the most economically effective Brake F2 system in RR cotton. Loc 2.
C45-14 Cotton and weed response to Anthem Flex.
C45B-14 Cotton and weed response to Anthem Flex.
C46-14 Cotton and weed response to Cadet/Marvel
C47-14 Cotton tolerance to Zidua directed at 5 leaf, square, or flower.
C48-14 Cotton tolerance to Cheetah Max applied at layby.
C49-14 Palmer amaranth and cotton response to a rolled rye conservation system to a conventional system.
C50-14 Impact of droplet size on Liberty, Clarity, and Weedar.
C51-14 Cotton response to Warrant, Dual, Zidua alone or mixed with Roundup or Liberty.
C51B-14 Cotton response to Warrant, Dual, Zidua alone or mixed with Roundup or Liberty.
C53-14 Cotton and weed response to residual at-plant herbicides applied PRE.
C54-14 Benefit of adjuvants with glyphosate + dicamba.
C55-14 Benefit of adjuvants with glyphosate + dicamba.
C56-14 Cotton response to simulated drift rates of 2,4-D amine applied at 4 lf, 9 lf, first bloom, bloom + 2 wk, bloom + 4 wk, and bloom + 6 wk.
C58-14 Cotton response to Hustkie directed or topically applied to cotton.
C59-14 Cotton and soybean response to simulated drift rates of Clarity.
C60-14 Cotton and soybean response to simulated drift rates of 2,4-D.


Vegetables
Veg1-14 Comparing fumigant systems in Echols County.
Veg2-14 Comparing fumigant systems in Worth County.
Veg3-14 Tomato, pepper, and weed response to Dominus mixtures.
Veg4-14 Impact of drip tape number and placement depth on fumigant activity.
Veg5-14 Tomato tolerance to Dual Magnum applied POST in plasticulture.
Veg6-14 Squash and watermelon response to Sandea applied over mulch prior to planting.
Veg7-14 Influence of ryegrass on weed control in watermelon.
Veg8-14 Seeded bareground pumpkin tolerance to Reflex systems.
Veg9-14 Developing bareground tomato herbicide systems with Reflex and Dual Magnum.
Veg10-14 Developing bareground bell pepper herbicide systems.
Veg11-14 Sweet corn response to Anthem and Anthem ATZ programs.
Veg12-14 Sweet potato response to Valor, Reflex and/or Dual Mag. systems.
Veg13-14 Intercropping squash and cotton.
Veg14-14 Intercropping cucumber and cotton.
Veg16-14 Sweet corn tolerance (6 cultivars) to Acuron and Lumax.
Veg16B-14 Soybean and cotton planted after sweet corn treated with Acuron or Lumax.
Veg17-14 Watermelon residues from drift rates of dicamba or 2,4-D.
Veg18-14 Cantaloupe residues from drift rates of dicamba or 2,4-D.
Veg20-14 Grafted watermelon response to Georgia herbicide programs.
Veg21-14 Pepper tolerance to Raynox and Raingard.
Veg21B-14 Pepper tolerance to Raynox and Raingard.
Veg23-14 Weed and crop response to Dominus, Telone II, and Chloropicrin mixtures.
Veg24-14 Evaluating effectiveness of Paladin EC systems applied through drip injection to first crop.
Veg25-14 Tomato tolerance to Dual Magnum applied topically.
Veg26-14 Sweet corn tolerance to simulated drift rates of Gramxone.
Veg26B-14 Sweet corn tolerance to simulated drift rates of Gramxone.
Veg27-14 Sweet corn tolerance to simulated drift rates of Roundup.
Veg28-14 Squash residues from simulated drift rates of dicamba or 2,4-D.
Veg29-14 Cucumber residues from simulated drift rates of dicamba or 2,4-D.
Veg30-14 Weed and cucumber response to PO, Telone II, and Chloropicrin mixtures.
Veg31-14 Controlling the previous bell pepper crop while preparing for a 2nd crop on mulch.
Veg32-14 Snap bean and soybean response to simulated drift rates of Clarity.
Veg33-14 Tolerance of seeded greens to Warrant or Dual Magnum
Veg35-14 Mustard response to simulated drift rates of Clarity.
Veg36-14 Mustard green response to simulated drift rates of 2,4-D.
Veg37-14 Large acreage tolerance of turnip to Warrant or Dual Magnum.
Veg38-14 Cabbage and broccoli response to simulated drift rates of Clarity
Veg39-14 Cabbage and broccoli response to simulated drift rates of 2,4-D
Veg40-14 Young broccoli response to simulated drift rates of Clarity.
Veg41-14 Young broccoli response to simulated drift rates of 2,4-D
Veg41B-14 Young broccoli response to simulated drift rates of 2,4-D
Veg42-14 RR sweet corn response to RU + Atrazine or RU + Atrazine + Sandea.
Veg43-14 Young kale response to simulated drift rates of Clarity.
Veg44-14 Young kale response to simulated drift rates of 2,4-D
Veg45-14 Greens and broccoli response to high simulated drift rates of dicamba & 24-D.


Wheat
W1-13 Zidua POST mixtures in wheat.
W2-13 Zidua PRE or Delayed PRE in winter wheat.
W3-13 Wheat and ryegrass response to Fierce, Valor, and Zidua as a delayed PRE.
W4-13 Wheat, radish, and ryegrass response to Fierce, Valor, and Zidua at spike.
W5-13 Influence of irrigation on 2,4-D preplant injury to wheat.
W6-13 Axiom, Huskie, and Osprey in winter wheat.
W7-13 Wheat and ryegrass response to Fierce, Valor, and Zidua at Spike.
W8-13 Drilled vs. field culitvated wheat response to Zidua PRE or Spike.
W10-13 Wheat response to Palisade.
W11-13 Wheat, ryegrass, and radish response to Zidua PRE and Fierce POST.
W12-13 Determining if residual uptake or contact is more important with Fierce.
W13-13 Wheat and weed response to F9312-3 preplant and PRE.
W13B-13 Wheat and weed response to F9312-3 preplant and PRE.




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.