University of Arkansas, Fayetteville ScholarWorks@UARK Research Series Arkansas Agricultural Experiment Station 9-2019 Summaries of Arkansas Cotton Research 2018 Fred Bourland University of Arkansas, Fayetteville Follow this and additional works at: https://scholarworks.uark.edu/aaesser Part of the Agronomy and Crop Sciences Commons, Horticulture Commons, Plant Breeding and Genetics Commons, and the Plant Pathology Commons Recommended Citation Bourland, Fred, "Summaries of Arkansas Cotton Research 2018" (2019). Research Series. 156. https://scholarworks.uark.edu/aaesser/156 This Report is brought to you for free and open access by the Arkansas Agricultural Experiment Station at ScholarWorks@UARK. It has been accepted for inclusion in Research Series by an authorized administrator of ScholarWorks@UARK. For more information, please contact [email protected]. Summaries of Arkansas Cotton Research 2018 Pigweed in cotton dictates Arkansas cotton productions systems Edited by Fred Bourland ARKANSAS AGRICULTURAL EXPERIMENT STATION September 2019 Research Series 660 This publication is available on the internet at https://arkansas-ag-news.uark.edu/research-series.aspx Cover Photo: Palmer amaranth (pigweed) in cotton plot at the Arkansas Agricultural Experiment Station, Fayetteville, Arkansas. Jason Norsworthy, University of Arkansas System Division of Agriculture. Layout by Christina Jamieson Technical editing and cover design by Gail Halleck Arkansas Agricultural Experiment Station, University of Arkansas System Division of Agriculture, Fayetteville. Mark J. Cochran, Vice President for Agriculture. Jean-François Meullenet, Associate Vice-President for Agriculture–Research and Director, AAES. WWW/InddCC2019. 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ISSN: 1941-1618 CODEN:AKAMA6 3 Summaries of Arkansas Cotton Research 2018 Fred Bourland, Editor University of Arkansas System Division of Agriculture Arkansas Agricultural Experiment Station Fayetteville, Arkansas 72704 Table of Contents Cotton Incorporated and the Arkansas State Support Committee ..................................................................................5 Acknowledgments ..........................................................................................................................................................6 Overview and Verification Review of the 2018 Arkansas Cotton Crop B. Robertson ...............................................................................................................................................................8 2018 Northeast Research and Extension Center: Overview of Cotton Research A. Beach and F.M. Bourland .....................................................................................................................................10 2018 Judd Hill Cooperative Research Station: Overview of Cotton Research A. Beach and F.M. Bourland .....................................................................................................................................12 2018 Manila Airport Cotton Research Station: Overview of Cotton Research F.M. Bourland and R. Benson ...................................................................................................................................14 2018 Lon Mann Cotton Research Station: Overview of Cotton Research C. Kennedy.................................................................................................................................................................16 2018 Rohwer Research Station: Overview of Cotton Research L. Martin and M. Young ............................................................................................................................................18 Cotton Research Verification Sustainability Program: Sustainability Report A. Free, B. Robertson, M. Daniels, B. Watkins, and S. Stevens................................................................................20 Cotton Research Verification Sustainability Program: 2018 Economic Report A. Free, B. Robertson, and B. Watkins ......................................................................................................................22 Breeding and Physiology University of Arkansas Cotton Breeding Program: 2018 Progress Report F.M. Bourland ............................................................................................................................................................25 Arkansas Cotton Variety Test 2018 F.M. Bourland, A. Beach, C. Kennedy, L. Martin, and B. Robertson ......................................................................27 Evaluation of Cotton in County Large-Plot On-Farm Variety Testing in Arkansas B. Robertson, A. Free, C. Manuel, and A. Howell ....................................................................................................30 Monitoring Tarnished Plant Bug Resistance in Cotton Cultivars G. Studebaker, C. Spinks, and F.M. Bourland ..........................................................................................................32 Pest Management Alternatives to Neonicotinoids for Control of Thrips in Cotton N.M. Taillon, G. Lorenz, B. Thrash, W. A. Plummer, K. McPherson, A. J. Cato, and N. Bateman .........................35 Changes in Plant Bug Efficacy Over 14 Years in Arkansas B. Thrash, G. Lorenz, N.M. Taillon, W. A. Plummer, K. McPherson, A.J. Cato, and N. Bateman ..........................39 Comparison of Bacillus thuringiensis Technologies, With and Without Diamide Applications, for Control of Helicoverpa Zea in Arkansas Cotton K. McPherson, G. Lorenz, B. Thrash, W.A. Plummer, N.M. Taillon, A.J. Cato, and N. Bateman ...........................45 Efficacy of Selected Insecticides for Control ofHelicoverpa Zea in Non-Bacillus thuringiensis Cotton A. Plummer, G. Lorenz, B. Thrash, N.M. Taillon, K. McPherson, A.J. Cato, and N. Bateman ...............................49 Monitoring Bollworm Populations in Arkansas Using ArcMap C. Spinks and G. Studebaker .....................................................................................................................................55 Integrated Management of Target Leaf Spot in Cotton B. Robertson, J. Davis, R. Benson, and A. Free .......................................................................................................60 Efficacy of Pre-emergence Cotton Herbicides on Protoporphyrinogen Oxidase Resistant Palmer Amaranth W. Coffman, T. Barber, J.K. Norsworthy, G.L. Priess, and Z.D. Lancaster .............................................................62 A Systems Approach to Weed Management in Enlist™ Cotton H.E. Wright, J.K. Norsworthy, J.T. Richburg, and L.T. Barber ................................................................................65 Evaluation of Interline™ Mixtures in Enlist™ Cotton J.A. Patterson, J.K. Norsworthy, Z.D. Lancaster, and L.T. Barber ..........................................................................68 Interaction Between Dicamba and Glufosinate G.L. Priess, J.K. Norsworthy, L.T. Barber, and M.C. Castner .................................................................................71 3 Efficacy of Brake Applied Alone and in Combination with Other Residual Herbicides in Cotton M.C. Castner, J.K. Norsworthy, L.T. Barber, Z.D. Lancaster, and J.T. Richburg ....................................................74 Loyant as a Potential Post-Direct Option in Cotton R.C. Doherty, T. Barber, Z.T. Hill, and A. Ross .......................................................................................................77 Consequences of Skipping Late-Season Herbicide Applications in Cotton J.T. Richburg, J.K. Norsworthy, L.T. Barber, M.C. Castner, and Z.D. Lancaster ....................................................81 Agronomy Within-Field Variability: A Case Study to Evaluate Factors Affecting Maturity and Yield in a Commercial Cotton Field in Northeast Arkansas J. Krob, J.W. Nowlin, and T.G. Teague .....................................................................................................................83 Impact of Cover Crop Termination on Soil Health and Lint Yield of Cotton B. Robertson, A. Free, and C. Manuel ......................................................................................................................89 Evaluation of Cotton Yield to In-Season Soil-Applied Potassium B. Robertson, A. Free, and C. Manuel ......................................................................................................................92 Evaluation of Soar® Bloom Spray in Cotton B. Robertson and A. Free ..........................................................................................................................................94 Seasonal Nutrient Losses in Runoff from Cotton M. Daniels, A. Sharpley, B. Robertson, P. Webb, L. Riley, A. Free, and M. Freyaldenhoven .................................96 Nutrient Losses Associated with Irrigation, Rainfall Runoff, and Seasonal Field Conditions in Cotton M. Daniels, B. Robertson, A. Sharpley, L. Riley, P. Webb, A. Free, and M. Freyaldenhoven ...............................100 4 Cotton Incorporated and the Arkansas State Support Committee The Summaries of Arkansas Cotton