2007
NCSU CROP SCIENCE
EXTENSION/RESEARCH
WEED MANAGEMENT TRIALS
BURNDOWN, SMALL GRAINS, CORN, COTTON, SOYBEANS
A. C. YORK, R. W. SEAGROVES, J. D. HINTON,
J. R. WHITAKER
INTRODUCTION
The weed management experiments summarized in this report are designed to:
1. Develop management systems for specific problem weeds.
2.
Develop and/or add to the database for
recommendations.
3. Demonstrate new and/or proven weed management practices to growers,
county extension personnel, and agri-business personnel.
Replicated experiments are established for specific needs and are located either on research stations or private farms. The experiments are a joint effort of North Carolina State University Weed Science Extension personnel, cooperating research station personnel and cooperating growers. Many commodity organizations and chemical companies provide financial support of these experiments.
Complete descriptions of application methods and other experimental details are provided with each experiment. Unless otherwise noted, all products in a particular treatment applied by the same method were tank mixes. Adjuvant rates are listed as either percent by volume or as amount of product per acre.
All data are presented as the treatment means across replications. Weed control and crop injury are expressed on a 0 to 100 scale where 0 represents no control or no crop injury and 100 represents complete control or crop death. Yields are corrected for moisture where appropriate and expressed in units appropriate for the commodity.
This publication contains results of use patterns of pesticides, some of which may not be registered for the particular uses. Such results are included for information purposes only and should not be taken as recommendations for use.
Questions or comments concerning this report may be directed
to Dr. A. C. York, Crop Science Department,
The authors gratefully acknowledge the financial contributions of the following commodity organizations and companies:
North Carolina Cotton Growers Association
North Carolina Soybean Producers Association
COMPANIES
INDEX OF EXPERIMENTS
Experiment Number Title
____________________________________________________________________________________________________________________
BD-02-2007 Burndown with Valor plus Original Max
BD-03-2007 Burndown with Glufosinate
BD-04-2007 Primrose burndown with tank mixes of glyphosate + ET, Valor, Direx, and 2,4-D
BD-05-2007 Burndown with Roundup plus Bicep/ET combinations
BD-06-2007 Burndown of Glyphosate-Resistant Horseweed
BD-07-2007 Palmer amaranth burndown with ET
TA-01-2007 Ryegrass control in wheat
TA-02-2007 Ryegrass control in wheat
TA-03-2007 Osprey with UAN at different rates
Corn Experiments
ZM-01-2007 Roundup Ready/Liberty Link Corn Tolerance with Safened SU herbicides
ZM-02-2007 Comparison of CHA 7950 and Accent in Corn
ZM-03-2007 Efficacy comparison of CHA 7950 and Accent; fallow
ZM-04-2007 Valor applied preplant to no-till RR/LL corn; NK Seed
ZM-05-2007 Resolve Preplant in no-till RR/LL corn
ZM-06-2007 Rage D-Tech burndown in no-till RR/LL corn
ZM-07-2007 Bicep and Touchdown in RR/LL Corn
ZM-08-2007 Resolve and Stout in RR/LL Corn
ZM-09-2007 Comparison of CHA 7950 and Accent in Corn
ZM-10-2007 Efficacy comaprison of CHA 7950 and Accent; fallow
ZM-11-2007 Impact Evaluation in RR Corn
ZM-12-2007 Weathermax plus HPPD inhibitor combinations in RR corn
ZM-13-2007 Comparison of three HPPD inhibitors
Cotton
Experiments
C-03-2007 Monsanto Glyphosate Formulation Comparisons
C-04-2007 Layby treatments in Roundup Ready Flex cotton
C-05-2007 Diuron 6.67 Evaluation in RR Flex Cotton
C-07-2007 Evaluation of Loveland Glyphosate Products
C-08-2007 Evaluation of Preemergence Herbicides in RR Flex Cotton
C-09-2007 Staple Systems in Roundup Ready Flex Cotton
C-10-2007 RR Cotton Tolerance of Prowl H2O under Severe Application Conditions
C-11-2007 Weed control with Roundup and Ignite in PHY 485 Widestrike Flex Cotton
C-12-2007 Layby Options in RR Flex Cotton
C-13-2007 Chloroacetamides applied POST in RR Flex cotton for glyphosate-resistant Palmer amaranth
C-14-2007 Preemergence herbicides for RR Flex cotton in the Blacklands
C-15-2007 Weed control with Roundup and Ignite in PHY 485 Widestrike Flex Cotton
C-16-2007 Chloroacetamides applied POST in No-Till RR Flex cotton for glyphosate-resistant Palmer amaranth
C-17-2007 Monsanto programs for glyphosate-resistant Palmer amaranth in no-till RR Flex cotton
C-18-2007 Palmer amaranth control in no-till Roundup Ready Flex cotton Monsanto Protocol
C-19-2007 Glyphosate-resistant Palmer amaranth control in conventional and strip-till RR Flex cotton
C-20-2007 Evaluation of PRE herbicides in systems for GR Palmer amaranth
C-21-2007 Salvage control of GR Palmer amaranth in Flex cotton
C-22-2007 GR Palmer amaranth control by residual herbicides applied preemergence
C-23-2007 Management systems for GR Palmer amaranth in Flex cotton
C-24-2007 GR Palmer amaranth management systems in no-till RR cotton
C-25-2007 Role of MSMA in control of GR Palmer amaranth in no-till RR cotton
C-27-2007 PHY 485 Widestrike Flex cotton response to Ignite
C-28-2007 PHY 485 Widestrike Flex cotton response to Ignite
C-29-2007 Weed control in RR Flex cotton with glyphosate/BAS 756H combinations
C-30-2007 Weed control with Roundup and Ignite in PHY 485 Widestrike Flex Cotton
C-31-2007 Chloroacetamides applied POST in PHY 485 Widestrike RR Flex cotton
C-32-2007 Preemergence herbicides for RR Flex cotton in the Blacklands
C-33-2007 GR Palmer sustainability study - Year 2
C-34-2007 Grass control with mixtures of glyphosate and other layby herbicides in RR cotton
C-35-2007 Widestrike/Flex cotton tolerance of Ignite/insecticide mixtures
C-36a-2007 Widestrike cotton response to Ignite as affected by AMS
C-36b-2007 Widestrike cotton response to Ignite as affected by AMS
C-37a-2007 Weathermax and Ignite Tankmixes
C-37b-2007 Weathermax and Ignite Tankmixes
Soybean
Experiments
SB-01-2007 Alternatives to glyphosate to control Palmer amaranth in no-till RR soybeans
SB-02b-2007 QER 54 Evaluation in Conventional-Till, Double-Crop Roundup Ready Soybean
SB-05-2007 Alternatives to glyphosate to control Palmer amaranth in conventional tillage Roundup Ready soybeans
SB-07-2007 Authority First, Authority MTZ, Rage D-Tech, and Valor in no-till RR Soybeans
SB-09-2007 Valor and Valor XLT in no-till Ready soybeans for Palmer amaranth
SB-10-2007 PRE/POST herbicide systems for Palmer amaranth in no-till RR/STS soybeans
SB-11-2007 Alternatives to glyphosate to control Palmer amaranth in no-till RR soybeans
SB-12-2007 PRE/POST herbicide systems for Palmer amaranth in RR/STS soybeans
SB-14-2007 Alternatives to glyphosate to control Palmer amaranth
SB-16-2007 Palmer amaranth response to dicamba
INDEX OF LOCATION
Location Experiments
____________________________________________________________________________
Central Crops C-03-2007, C-04-2007, C-05-2007, C-07-2007, C-08-2007,
C-09-2007, C-10-2007, C-11-2007, C-36a-2007, SB-01-2007,
SB-05-2007, TA-02-2007, TA-03-2007, ZM-01-2007,
Hyde County C-12-2007, C-13-2007, C-14-2007
Mount Olive C-15-2007, C-16-2007, C-17-2007, C-18-2007, C-19-2007,
C-20-2007, C-21-2007, C-22-2007, C-23-2007, C-24-2007,
C-25-2007, C-33-2007, SB-02b-2007, SB-09-2007,
SB-10-2007, SB-11-2007, SB-16-2007, BD-07-2007
Nash County BD-03-2007, BD-06-2007
Peanut Belt C-27-2007, C-35-2007
Robeson County SB-12-2007, SB-14-2007
Tidewater Station C-30-2007, C-31-2007, C-32-2007, C-36b-2007
Upper Coastal Plain C-28-2007, C-29-2007, C-34-2007, C-37a-2007, C-37b-2007,
ZM-04-2007, ZM-05-2007, ZM-06-2007, ZM-07-2007,
ZM-08-2007, ZM-09-2007, ZM-10-2007, ZM-11-2007,
Upper Coastal Plain BD-02-2007, BD-04-2007, BD-05-2007, SB-07-2007
IMPORTANT LINKS
North Carolina State University
NCSU Department of Crop Science
NCSU College of Agriculture and Life Sciences
Cooperative
Extension Service Links:
North Carolina Agricultural Chemicals Manual
North Carolina Corn Production Guide
North Carolina Cotton Production Guide
North Carolina Peanut Production Guide
North Carolina Small Grain Production Guide
North Carolina Flue-cured Tobacco Production Guide
Other
Links:
Adobe Systems Incorporated (Acrobat Reader download)
NCARS Weather and Climate Network
North Carolina Department of Agriculture & Consumer Services (Research Stations Division)
Weed Science Society of America
Weed Science Society of North Carolina