Proceedings of the 39th Annual Meeting, Southern Soybean Disease Workers (March 7-8, 2012, Pensacola Beach, Florida)

Contents Symposium: Soybean Nematodes: Their Status, Impact and Management The Current Status of Nematodes of Soybean in Louisiana and Arkansas. Charles Overstreet, Edward C McGawley, Melea Martin, and Terry Kirkpatrick A Molecular Analysis of Resistance of Soybean to the Soybean Cyst Nematode. Vincent Klink Racism in Nematology. Terry Niblack SCN-resistant Soybeans, HG types, Yield, and SCN Reproduction: How It All Comes Together in the Field in Iowa. Gregory Tylka Soybean Lines Evaluated for Resistance to Reniform Nematode. Sally Stetina Graduate student presentations (Boyd Padgett, moderator) Fungicide Resistance in Cercospora kikuchii, a Major Pathogen of Louisiana Soybean. Trey Price Variation in the Internal Transcribed Spacer (ITS) Region within Phakopsora pachyrhizi and Implications for the Currently Used Molecular Diagnostic Assays. Tomas Rush Theoretical Disease and Decision Model for Fungicide Applications for Soybean Rust. Heather Marie Young Relationship Between Stink Bug Damaged Soybean Seed and Incidence of Phomopsis longicolla in the Mississippi Soybean Production System. Joshua Jones, Angus Catchot, Fred Musser, Tom Allen, Maria Tomaso-Peterson, and Jeff Gore, lV Spatial Assessment of Rhizoctonia solani In Fields Undergoing Rice/Soybean Rotations. TN Spurlock, CS Rothrock, and WS Monfort Thursday, March 8th session (Danise Beadle, moderator) Sustaining the Pest Information Platform for Extension and Education with Support from Industry (I-PIPE). Scott Isard Screening Germplasm for Resistance to Phomopsis Seed Decay: Joint Effort from USDA and University Scientists. Shuxian Li, Gabe Sciumbato, Pengyin Chen, John Rupe, Allen Wrather, James R Smith and Randall L Nelson Effect of Storage on Soybean Seed Quality and Emergence. John Rupe Foliar Fungicides to Prevent Yield Loss Attributed to Aerial Web Blight in Mississippi, 2010 and 2011. Tom Allen, Alan Blaine, Bernie White, and Billy Moore Mycovirus-induced Hypovirulence as an Alternative Means to Control Fungal Diseases of Soybean. Said A Ghabrial and Jiatao Xie Managing Cercospora Blight in Louisiana: Facing New Challenges. Boyd Padgett, Trey Price, Brooks Blanche, Ray Schneider, Clayton Hollier, and Myra Purvis Seasonal Progress of Charcoal Rot and Its Impact on Soybean Productivity. Alemu Mengistu Discussion session: Soybean Disease Resistance (Clayton Hollier, moderator) Fungicide Resistance in Cercospora sojina: Chapter 2. Carl A Bradley and Guirong R Zhang Fungicide Efficacy on Strobilurin Resistant Cercospora sojina (Frogeye Leaf Spot) in Soybean. Melvin Newman Strobilurin Resistance in Rhizoctonia solani in Soybeans in Louisiana. Clayton A. Hollier Southern United States Soybean Disease Loss Estimate for 2011. Compiled by Stephen R. Koennin

Proceedings of the 48th Annual Meeting, Southern Soybean Disease Workers (March 3, 2021, Virtual Content)

2021 Southern Soybean Disease Workers Agenda Virtual | Wednesday, March 3, 2021 Southern United States Soybean Disease Loss Estimates for 2020. TW Allen, K Bissonnette, CA Bradley, JP Damicone, NS Dufault, TR Faske, T Isakeit, RC Kemerait, A Koehler, D Langston, JD Mueller, GB Padgett, PP Price, EJ Sikora, IM Small, L Thiessen, and H Young Student papers (Tessie Wilkerson, moderator) Secondary metabolites produced by Xylaria necrophora are responsible for the foliar symptoms associated with taproot decline of soybean. Teddy Garcia-Aroca, Trey Price, José Solórzano, David Galo, Sophie Sheffield, Jonathan K. Richards, and Vinson P. Doyle Meta-analysis of fungicide performance for managing frogeye leaf spot on soybean in the United States. Jhonatan P Barro, Emerson M Del Ponte, Tom Allen, Jason P Bond, Travis R Faske, Clayton A Hollier, Yuba R Kandel, Daren S Mueller, Heather M Kelly, Nathan M Kleczewski, Paul Price, Edward J Sikora, and Carl A Bradley Using metagenomic tools to explore the suppression of soybean cyst nematode populations in fields double-cropped with wheat and soybean. Leonardo F Rocha, Jason P Bond, Ahmad M Fakhoury Investigating the effects of demethylation inhibitor fungicides and the insecticide malathion on Corynespora cassiicola. Ty Smith, Heather Kelly, and Larry Steckel DNA-based protocol for rapid detection of QoI (Strobilurin) fungicide resistance in Cercospora sojina and a statewide survey of foliar fungicide use for soybean disease management in Nebraska. Asha Mane, Tamra Jackson-Ziems, Carl Bradley, and Syndney Everhart Assessing Missouri soybean fields for fungicide-resistant Cercospora sojina. Bruna Just, and Kaitlyn M Bissonnette Contributed papers (Trey Price, moderator) Observations from soybean rust monitoring and fungicide field demonstrations in Alabama in 2020. Edward J Sikora and Kassie Conner Field performance of two new commercially available premix fungicides for management of foliar disease of soybean in Arkansas. Terry N Spurlock, Robert C Hoyle, Sydney F Kling, and Amanda C Tolbert The impact of different crop rotations on soilborne microbial diversity and disease emergence of soybean-corn cropping system. Qiurong Fan, Travis Faske, Terry Spurlock, Alejandro Rojas and Trent Roberts SCN Coalition: Updates and Evolution. Sam Markell and Albert Tenuta Evaluating varieties in the Mississippi State University Official Variety Trial Program for the presence and severity of green stem. Tom Allen, Walter Solomon, and Brad Burgess Proceedings of the Southern Soybean Disease Workers are published annually by the Southern Soybean Disease Workers. Text, references, figures, and tables are reproduced as they were submitted by authors. The opinions expressed by the participants at this conference are their own and do not necessarily represent those of the Southern Soybean Workers. Mention of a trademark or proprietary products in this publication does not constitute a guarantee, warranty, or endorsement of that product by the Southern Soybean Disease Workers

Proceedings of the 47th Annual Meeting, Southern Soybean Disease Workers (March 4-5, 2020, Pensacola Beach, Florida)

Contents Southern United States soybean disease loss estimates for 2019. TW Allen, K Bissonnette, CA Bradley, JP Damicone, NS Dufault, TR Faske, T Isakeit, RC Kemerait, A Koehler, HL Mehl, JD Mueller, GB Padgett, PP Price, EJ Sikora, IM Small, L Thiessen, and H Young Abstracts of presented papers Fungicide efficacy on target spot in Tennessee soybean. Ty Smith, H Kelly, and Z Hansen Temporal dynamics of Neohydatothrips variabilis, Frankliniella tritici, and Frankliniella fusca in South Central Wisconsin and the occurrence of Soybean vein necrosis virus. Cristina Zambrana-Echevarria, S Kaplan, RL Groves, and DL Smith Population distributions and densities of nematodes, and virulence phenotypes of soybean cyst nematode in Tennessee. Rufus Akinrinlola, and H Kelly Improving soybean white mold control by integrated management. Wade Webster, B Mueller, J Gaska, D Mueller, MI Chilvers, S Conley, and DL Smith Assessment of QoI sensitivity and frogeye leaf spot race of Cercospora sojina in Georgia soybean. Bennett Harrelson, A Culbreath, R Kemerait, Jr, and J Buck Reduction of Pythium damping-off in soybean by biocontrol seed treatment. Mirian F Pimentel, E Arnao, A Warner, N Elsharif, M Chilvers, A Robertson, J Bond, and A Fakhoury Understanding cercosporin self-resistance to identify novel tools to manage Cercospora leaf blight on soybean. Maria Izabel Costa de Novaes, CL Robertson, VP Doyle, and S Thomas-Sharma Evaluating the efficacy of soybean seed treatment on high and low vigor seed in Arkansas. Samantha Segalin, JC Rupe, JA Rojas, and R Holland Impact of wheat on soybean cyst nematode (Heterodera glycines I.) populations in a soybean double cropping system. Leonardo F Rocha, MF Pimentel, JP Bond, and AM Fakhoury Using unmanned aerial systems and multispectral imagery to assess sudden death syndrome of soybean. Lindsey McKinzie, AM Fakhoury, R Li, and JP Bond Soybean rust: Scourge of Alabama. Ed J Sikora, D Delaney, and K Connor Management of SCN and SDS with nematode-protectant seed treatments across multiple environments. Kaitlyn M Bissonnette, Y Kandel, M Chilvers, N Kleczewski, D Mueller, D Smith, D Telenko, and A Tenuta Determining inoculum density of Xylaria sp., the taproot decline pathogen, in soil under various crop rotation systems. Aline Bronzato-Badial, K Phillips, TH Wilkerson, and M Tomas-Peterson A new pathosystem to study the plant-fungal interactions underlying Cercospora leaf blight of soybean. Kona Swift and B Bluhm Impact of cultivar on soybean foliar and seed diseases in Arkansas. John C Rupe, RT Holland, and JA Rojas Thoughts on southern blight: Should we be concerned about southern blight? Tom W Allen, WL Solomon, and BA Burgess From plots to strips: Six years of fungicide trials. Terry N Spurlock, AC Tolbert, and RC Hoyle Meta-analysis of soybean yield response to foliar fungicides evaluated from 2005 to 2018 in the United States and Canada. Yuba K Kandel, C Hunt, K Ames, N Arneson, CA Bradley, E Byamukama, A Byrne, MI Chilvers, L Giesler, J Halvorson, DC Hooker, NM Kleczewski, DK Malvick, S Markell, B Potter, W Pederson, DL Smith, AU Tenuta, DEP Telenko, KA Wise, and DS Mueller On the road in Louisiana: Taking the research station to farms. Trey Price, MA Purvis, DA Ezell, GB Padgett, M Foster, and J Hebert The next super model: Development of a flexible framework for multiple disease models in soybean. Damon L Smith, J Willbur, M Chilvers, M Kabbage, SP Conley, D Mueller, and R Schmidt IPM implementation in Tennessee. Heather M Kelly, S Stewart, K Vail, D Hensley, S Steckel, A McClure, and T Raper Reproduction potential and survival of soybean nematodes in row rice. Travis Faske, K Brown, and N Bateman Initial research with peracetic acid as a disease management tool in soybeans and other legume crops. Vijay K Choppakatla FMC fungicide offerings update. Matthew Wiggins Abstracts for presented posters Extension efforts in disseminating nematode survey results. Rachel Guyer, R Akinrinlola, and H Young Assessing the role of weathering on the grain quality of soybean varieties in the Mississippi Delta. Tessie H Wilkerson, TW Allen, and BA Burgess Proceedings of the Southern Soybean Disease Workers are published annually by the Southern Soybean Disease Workers. Text, references, figures, and tables are reproduced as they were submitted by authors. The opinions expressed by the participants at this conference are their own and do not necessarily represent those of the Southern Soybean Workers. Mention of a trademark or proprietary products in this publication does not constitute a guarantee, warranty, or endorsement of that product by the Southern Soybean Disease Workers

Proceedings of the 44th Annual Meeting, Southern Soybean Disease Workers (March 8-9, 2017, Pensacola Beach, Florida)

Contents Agenda for March 8-9, 2017 Contributed papers Soybean cyst nematode: current status, challenges and opportunities. G Tylka and K Bissonnette Updates of the 2nd SCN (Soybean Cyst Nematode) Coalition. Albert Tenuta Developing management zones for nematodes in soybean. C Overstreet, EC McGawley, DM Xavier-Mis, and M Kularathna Microbial communities associated with long-term tillage and fertilizer management practices. AY Srour, J Hackman, RL Cook, JP Bond, and AM Fakhoury Microbial profile of SDS-suppressive soils in soybean fields. AY Srour, LFS Leonardo, DK Malvick, JP Bond, and AM Fakhoury Understanding the phytobiome; using strip trials and spatial analysis to determine concomitant maladies in soybean fields. TN Spurlock and TL Kirkpatrick Update on the importance and management strategies of root-knot nematode in Arkansas. T Faske Student papers The effect of abamectin on maturity group V soybean varieties (Glycine max) in root-knot (Meloidogyne incognita) nematode Infested fields of Alabama. W Groover, D Dodge, K Lawrence, E Sikora, and D Delaney Reniform nematode in the variable soil texture of a Commerce silt loam soil. DM Xavier-Mis, C Overstreet, EC McGawley, and M Kularathna Catenaria anguillulae: Potential biological control agent to aid in the management of Heterodera glycines (Soybean Cyst Nematode). DR Dyer, N Xiang, and KS Lawrence New charcoal rot management strategies: supplementing secondary nutrients. TH Wilkerson, M Tomaso-Peterson, BR Golden, S Lu, AB Johnson, and TW Allen The effects of cover crops on soil-borne seedling pathogens: a metagenomics study. JJ Hackman, AY Srour, JP Bond, RL Cook, and AM Fakhoury Plant growth characteristics and yield of soybean as a result of fungicide-associated phytotoxicity. WJ Mansour, M Tomaso-Peterson, A Henn, JA Bond, JT Irby, and TW Allen Evaluating thiophanate-methyl sensitivity as an alternative control option for QoI-resistant populations of Cercospora sojina in Mississippi. H Renfroe, N Brochard, M Tomaso-Peterson, and TW Allen Target spot and potential resistance to QoI fungicides in Mississippi soybean. N Brochard, M Tomaso-Peterson, TW Allen, BH Bluhm, B Dhillon, and TR Faske Target Spot Symposium Contributed papers Soybean rust: a threat to the soybean crop in the Midwest? E Sikora Effect of variety, seed treatment, and in-furrow fungicide on taproot decline of soybean. P Price, T W Allen, H Pruitt, MA Purvis, M Tomaso-Peterson, and T Wilkerson Coupling spore traps and quantitative PCR assays for detection of Cercospora sojina, the causal agent of soybean frogeye leaf spot. B Lin, A Mengistu, H Yu, and H Kelly Frogeye leaf spot management: the UUOT part deux. TW Allen, TR Faske, CA Hollier, D Mueller, P Price, TN Spurlock, and H Kelly Southern United States Soybean Disease Loss Estimates for 2016. TW Allen, CA Bradley, JP Damicone, NS Dufault, TR Faske, CA Hollier, T Isakeit, RC Kemerait, NM Kleczewski, RJ Kratochvil, HL Mehl, JD Mueller, C Overstreet, PP Price, EJ Sikora, TN Spurlock, L Thiessen, WJ Wiebold, and H Young Proceedings of the Southern Soybean Disease Workers are published annually by the Southern Soybean Disease Workers. Text, references, figures, and tables are reproduced as they were submitted by authors. The opinions expressed by the participants at this conference are their own and do not necessarily represent those of the Southern Soybean Workers. Mention of a trademark or proprietary products in this publication does not constitute a guarantee, warranty, or endorsement of that product by the Southern Soybean Disease Workers

Proceedings of the 41st Annual Meeting, Southern Soybean Disease Workers (March 5-6, 2014, Pensacola Beach, Florida)

Contents Schedule Southern United Station Soybean Disease Loss Estimates for 2013. Compiled by SR Koenning Graduate student paper competition (Ed Sikora, moderator) Association of Phomopsis longicolla and Macrophomina phaseolina with zone lines in soybean roots at maturity. ML Zaccaron, JC Rupe, and RT Holland Molecular Phylogenetic Redefinition of Cercospora kikuchii. S Albu, P Price, V Doyle, and R Schneider The effects of salinity on Pythium rot of soybean. TJ Stetina, CS Rothrock, and JC Rupe Distribution of Cercospora sojina and sensitivity to Qol fungicides in Mississippi soybean fields. J Standish, M Tomaso-Peterson, TW Allen, S Sabanadzovic, N Aboughanem-Sabanadzovic Effect of crop rotation, location and isolation temperature on Pythium spp. population composition in Arkansas. KE Urrea, JC Rupe, CS Rothrock, MI Chilvers, and JA Rojas Soybean Cultivars and Fungicide Responses to Frogeye Leaf Spot: Ten Years of Field Data Heather. M Kelly, William J Jordan, and Melvin Newman Observations on Soybean Rust and Soybean Vein Necrosis Virus in Alabama in 2013. EJ Sikora, K Conner, D Delaney, L. Zhang, and M Delaney Importance of kudzu as a reservoir for soybean viruses: preliminary data. N Aboughanem-Sabanadzovic, WF Moore, TW Allen, A Lawrence, and S Sabanadzovic Management of Cercospora Leaf Blight of Soybean with Foliar Applications of Iron. E Chagas da Silva, AK Chanda, T Garcia Aroca, CL Robertson, E Tubana, B Ward, S Albu and RW Schneider Late Fungicide Applications to Manage Frogeye Leaf Spot in the Mississippi Soybean Production System. TW Allen, TH Wilkerson, JT Irby, and BR Golden Development and Optimization of a Weather-based Disease Advisory for Soybean. HL Mehl and PM Phipps An Encounter with Target Spot and its Management with Fungicides. RW Schneider, CL Robertson, E Chagas da Silva and B Ward Cercospora Leaf Blight of Soybean: Latent Infection and Symptom Development. Ashok K Chanda., Zhi-Yuan Chen, Eduardo Chagas da Silva, and Raymond W Schneider Effect of Long-term Potassium Fertilization Rate on Sudden Death Syndrome, Cercospora Leaf Blight and Frogeye Leaf Spot of Soybean. JC Rupe, NA Slaton, RT Holland, ML Zaccron, R OeLong, AJ Steger Sensitivity of Meloidogyne incognita and Rotylenchulus reniformis to fluopyram. Travis Faske and Katherine Hurd Reniform nematode influence on soybean production in Louisiana. C Overstreet, EC McGawley, DM Xavier, and MT Kularathna Rhizoctonias associated with soybean in the Southeast United States. CS Rothrock, SA Winters, and TN Spurlock Proceedings of the Southern Soybean Disease Workers are published annually by the Southern Soybean Disease Workers. Text, references, figure, and tables are reproduced at they were submitted by the authors. The opinions expressed by the participants at this conference are their own and do not necessarily represent those of the Southern Soybean Disease Workers. Mention of a trademark or proprietary products in this publication does not constitute a guarantee, warranty, or endorsement of that product by the Southern Soybean Disease Workers

Proceedings of the 42nd Annual Meeting, Southern Soybean Disease Workers (March 11-12, 2015, Pensacola Beach, Florida)

Contents Schedule Southern United States Soybean Disease Loss Estimates for 2014. TW Allen, JP Damicone, NS Dufault, TR Faske, DE Hershman, CA Hollier, T Isakeit, RC Kemerait, NM Kleczewski, SR Koenning, HL Mehl, JD Mueller, C Overstreet, P Price, EJ Sikora, and H Young Graduate student competition (Trey Price, moderator) Effect of Secondary Nutrient Applications on Suppression of Charcoal Rot in Soybean. T Wilkerson, M Tomasu-Peterson, BR Golden, S Lu, AB Johnson, and TW Allen Molecular Characterization of the G143A Mutation Leading to QoI Fungicide Resistance among Fungal Pathogens Causing Cercospora Leaf Blight and Purple Seed Stain of Soybean. S Albu, P Price, V Doyle, and RW Schneider The Effects of Starter Fertilizer on Soybean Infected with Fusarium virguliforme or Rhizoctonia solani. J Miller, C Vick, A Vick, and J Bond Root-knot Nematodes (Meloidogyne spp.) Associated with Soybean in Arkansas. C Khanal, RT Robbins, C Overstreet, and EC McGawley Tillage, Fungicide, and Cultivar Effects on Frogeye Leaf Spot Severity and Yield in Soybean. J Jordan, A Mengistu, HM Kelly, N Bellaloui, PR Arelli, KN Reddy, and AJ Wrather Frogeye Leaf Spot Response to Solo and Combination Fungicides. AM Cochran, HM Kelly, K Lamour, and C Bradley A New Perspective on Cercospora Leaf Blight Symptoms on Soybean. EC Silva, TG Garcia, AV Lygin, AK Chanda, CL Robertson, BM Ward, and RW Schneider Using a Hill Plot Technique for Evaluating Soybean Varieties for Resistance to Sudden Death Syndrome. J Padgett, A Vick, C Vick, C Schmidt, and J Bond Evaluating the Resistance of Some Soybean Varieties/Cultivars on Reniform Isolates from Louisiana. MT Kularathna, C Overstreet, EC McGawley, and DM Xavier Investigating Fungicide Sensitivities Beyond the QoIs in Cercospora sojina from Mississippi. JR Standish, M Tomaso-Peterson, TW Allen, S Sabanadzovic, and N Aboughanem-Sabanadzovic Using Fluopyram as a Seed Treatment to Reduce Sudden Death Syndrome in Resistant and Susceptible Soybean Varieties. D Esker, C Vick, A Vick, and J Bond Glyphosate Affects Cercospora Leaf Blight and Brown Spot of Soybean. TG Garcia, EC Silva, BM Ward, CL Robertson, R Levy, and RW Schneider Efficacy of Seed Treatments for Management of Fusarium virguliforme and Heterodera glycines. N Frederking, A Fakhoury, J Bond Minor Element Application as a Management Strategy for Soybean Rust and Cercospora Leaf Blight. BM Ward, CL Robertson, EC Silva, TG Garcia, and RW Schneider Management of Frogeye Leaf Spot and Determining the Impact of Fungicide Phytotoxicity in Mississippi Soybean. WJ Mansour, JT Irby, BR Golden, TH Wilkerson, and TW Allen Contributed papers (Heather Kelly, moderator) Soybean Disease Management Issues in Louisiana During 2014. P Price, MA Purvis, and HN Pruitt Soybean Vein Necrosis Virus in Mississippi N. Aboughanem-Sabanadzovic, S. Sabanadzovic. TW Allen, WF Moore, and RC Stephenson Monitoring for Soybean Vein Necrosis Virus in Alabama (2014). E Sikora, K Conner, and L Zhang Challenges and Opportunities in the Use of Molecular Tools to Detect Strobilurin/QoI Fungicide Resistance: The Case of Frogeye Leaf Spot. H Kelly and B Vega An Update of Research on Phomopsis Seed Decay in Soybean. S Li, J Rupe, P Chen, G Shannon, and G Sciumbato Assessment of Several Commercially Available Triazole and Premix Fungicides for Management of Frogeye Leaf Spot in Arkansas. TR Faske and M Emerson ILeVO® Seed Treatment for Control of SDS and Nematodes in Soybeans. C Graham Use of Random Point Assignments to Determine the Impact of Sudden Death Syndrome and Other Soilborne Diseases. T Spurlock and W Kirkpatrick Effect of Planting Date, Planting Density, Seed Treatment, and Seed Quality on Soybean Stand and Yield in Arkansas. JC Rupe, AJ Steger, RT Holland, CS Rothrock, EE Gbur, Jr, WJ Ross, and MP Popp Proceedings of the Southern Soybean Disease Workers are published annually by the Southern Soybean Disease Workers. Text, references, figures, and tables are reproduced as they were submitted by authors. The opinions expressed by the participants at this conference are their own and do not necessarily represent those of the Southern Soybean Workers. Mention of a trademark or proprietary products in this publication does not constitute a guaran-tee, warranty, or endorsement of that product by the Southern Soybean Disease Workers

Proceedings of the 40th Annual Meeting, Southern Soybean Disease Workers (March 13-14, 2013, Pensacola Beach, Florida)

Contents Southern United States Soybean Disease Loss Estimates for 2012. Compiled by SR Koenning Update on Detection and Management of QoI Fungicide Resistant Cercospora sojina, the Causal Agent of Frogeye Leaf Spot in Soybean. C Bradley, G Zhang, V Chapara, R Ming, F Zeng, H Young Kelly, and M Newman Identification of Soybean Genotypes to Cercopsora sojina by Field Screening and Molecular Markers. A Mengistu and R Mian Soybean Vein Necrosis Virus. D Hershman Single Applications of Triazole Fungicides at R1 for Management of Cercospora Leaf Blight and Rust in Soybean. RW Schneider, CL Robertson, BM Ward, and EC Silva Observations on soybean rust management in Alabama in 2012. EJ Sikora, D Delaney, and M Delaney Graduate student paper competition (Clayton Hollier, moderator) Logical Areas of Collection: A Precision Concept for Management of Rhizoctonia solani AG1-IA. TN Spurlock, CS Rothrock, and WS Monfort Screening of Soybean Recombinant Inbred Lines against Phakopsora pachyrhizi. M Ganiger, DR Walker, and ZY Chen Effects of Minor Element Nutrition on Cercospora Leaf Blight of Soybean. BM Ward, CL Robertson, RW Schneider, and EC Silva Sensitivity of Cercospora kikuchii Populations to Methyl Benzimidazole, Carbamate, Quinone Outside Inhibitor, and Demethylation Inhibitor Fungicides. P Price, MA Purvis, CL Robertson, GB Padgett, and RW Schneider Effect of Foliar Application of Micronutrients on Severity of Rust in Soybean. EC Silva, BM Ward, CL Robertson, and RW Schneider Southern Soybean Disease Workers paper session (Tom Allen, moderator) History of Reniform Nematode in the South. RT Robbins Role of Seed Quality, Planting Date, and Seed Treatment on Soybean Stand and Yield. JC Rupe, R Holland, A Steger, S Goeke, EE Gbur, WJ Ross, M Wyss, J McCoy, and R Cingolani Screening Soybean Germplasm and Commercial Varieties for Resistance to Phomopsis Seed Decay: Results from 2012 Trials. S Li, G Sciumbato, P Chen, S Sun, J Rupe, R Holland, and A Steger A Novel Seed Treatment with Activity against SDS in Soybeans. C Graham Adenosylhomocysteinase (AHCY) is essential for Virulence of Cercospora kikuchii in soybeans. AK Chanda, RW Schneider, and Z-Y Chen Fungicide Timing Strategies: Targeting Yield Enhancement in Mississippi Soybean. TW Allen, D Cook, A Catchot, J Gore, and N Buehring Update from the United Soybean Board. K Whiting Industry Pest Information Platform for Extension and Education (iPiPE). S Isard, R Magarey, J Golod, and J Russo Proceedings of the Southern Soybean Disease Workers are published annually by the Southern Soybean Disease Workers. Text, references, figures, and tables are reproduced as they were submitted by authors. The opinions expressed by the participants at this conference are their own and do not necessarily represent those of the Southern Soybean Workers. Mention of a trademark or proprietary products in this publication does not constitute a guarantee, warranty, or endorsement of that product by the Southern Soybean Disease Workers

Proceedings of the 45th Annual Meeting of the Southern Soybean Disease Workers (March 7-8, 2018, Pensacola Beach, Florida)

Contents List of SSDW Officers Agenda for March 7-8, 2018 Abstracts for contributed/presented papers Retrospective analyses regarding the impact of soybean diseases in the USA .TW Allen, PD Esker, and CA Bradley Diaporthe (Phomopsis) species on soybean: current status in the United States. Febina Mathew, Kristina Petrovic, Lisa Castlebury, Tom Allen, Gary Bergstrom, John Bonkowski, Carl Bradley, James Buck, Emmanuel Byamukama, Martin Chilvers, Anne Dorrance, Nicholas Dufault, Loren Giesler, Nancy Gregory, Heather Kelly, Nathan Kleczewski, Trey Price, Dean Malvick, Sam Markell, Daren Mueller, Damon Smith, Terry Spurlock, Kiersten Wise, and Marina Johnson New insights into the genetic underpinnings of pathogenesis in Cercospora cf. flagellaris. Burt Bluhm, Ahmad Fakhoury, Alex Zaccaron, and Kona Swift Evaluation of spore traps and molecular tools for a fungicide decision model for frogeye leaf spot. HM Kelly and B Lin Site-specific management strategies against multiple nematode species in soybean. C Overstreet, EC McGawley, DM Xavier-Mis, and JS Rezende Field efficacy of two new seed-applied biological agents for suppression of root-knot nematodes in soybean. Travis R Faske, Michael Emerson, and Katherine Hurd Evaluation of 418 soybean plant introductions with reported resistance to soybean cyst nematode for reniform nematode resistance. Robert T Robbins and Devany Crippen Studies on Soybean vein necrosis virus in Alabama. EJ Sikora, D Delaney, A Jacobson, K Conner, A Chitturi, and J Kemble Using unmanned aerial vehicle (UAV) photograph analysis to generate corroborating data in small plot soybean fungicide efficacy trials. P Price, MA Purvis, and P Washam Building a foundation for cultivar and fungicide selection decisions in soybean. HM Kelly Results from the 2017 Mississippi State University target spot fungicide efficacy program. TW Allen and TH Wilkerson Relating temperature and relative humidity in commercial warehouses to decline in vigor of soybean seed stored for late plantings in Arkansas. JC Rupe, JA Lee, A Palmer, RT Holland, J Robinson, RD Cartwright, and G Atungulu Seed treatment for sudden death syndrome management in soybean. Yuba R Kandel, Carl A Bradley, Martin I Chilvers, Febina M Mathew, Albert U Tenuta, Damon L Smith, Kiersten A Wise, and Daren S Mueller Evaluation of screening methods for soil-borne diseases of soybean (Glycine max) in west Tennessee. R Guyer, E Zuchelli, and H Kelly Abstracts for student papers An update on taproot decline in Arkansas. J Bailey, AC Tolbert, B Boney, and TN Spurlock Taproot decline of soybean is caused by an undescribed species in the Genus Xylaria. T Garcia-Aroca, P Price, M Tomaso-Peterson, T Spurlock, TR Faske, B Bluhm, K Conner, EJ Sikora, R Guyer, H Kelly, TW Allen, and VP Doyle Assessing pathogenicity and virulence of Xylaria sp. isolates from Mississippi soybean. H Renfroe, T Wilkerson, T Allen, and M Tomaso-Peterson Effects of mycovirus infection on virulence of Rhizoctonia solani in soybean. TJ Stetina, CS Rothrock, and TN Spurlock Is the emergence of Soybean vein necrosis virus linked to the re-emergence of Tobacco streak virus? C Zambrana-Echevarría, CL Groves, TL German, and DL Smith Is soybean vein necrosis a threat to soybean production? NR Anderson, MD Irizarry, CA Bloomingdale, DL Smith, CA Bradley, DP Delaney, NM Kleczewski, EJ Sikora, DS Mueller, and KA Wise Yield prediction in soybean fields using satellite imagery. B Boney and TN Spurlock Elucidating the race population structure of Cercospora sojina through genotypic patterns. Wagner Fagundes, Marcio Zaccaron, Alex Zaccaron, and Burton H Bluhm Impact of foliar fungicide applications in soybean fields across aggregated distributions of disease. M Patterson, AC Tolbert, and TN Spurlock Abstract for presented poster Assessing the genetic diversity of Cercospora spp. associated with Cercospora leaf blight of soybean in North America. Kona Swift and Burt Bluhm Southern United States soybean disease loss estimates for 2017. TW Allen, K Bissonnette, CA Bradley, JP Damicone, NS Dufault, TR Faske, CA Hollier, T Isakeit, RC Kemerait, NM Kleczewski, HL Mehl, JD Mueller, C Overstreet, PP Price, EJ Sikora, TN Spurlock, L Thiessen, and H Young Proceedings of the Southern Soybean Disease Workers area published annually by the Southern Soybean Disease Workers. Text, references, figures, and tables are reproduced as they were submitted by authors. The opinions expressed by the participants at this conference are their own and do not necessarily represent those of the Southern Soybean Disease Workers. Mention of a trademark or proprietary products in this publication does not constitute a guarantee, warranty, or endorsement of that product by the Southern Soybean Disease Workers. Appreciation is given to the staff at the University of Kentucky Research & Education Center, Princeton, KY, for their assistance in assembling these Proceedings

Proceedings of the 50th Annual Meeting, Southern Soybean Disease Workers (March 1-2, 2023, Pensacola Beach, Florida)

Southern United States Soybean Disease Loss Estimates for 2022. TW Allen, K Bissonnette, CA, Bradley, TR Faske, Z Grabau, T Isakeit, RC Kemerait, A Koehler, D Langston, J Lofton, JD Mueller, GB Padgett, PP Price, EJ Sikora, IM Small, R Vann, and H Young Reflecting and Looking Forward: Perspectives from “Legends” and “Fresh Faces” of the SSDW (Moderators: Kiersten Wise and Ian Small) The Implementation of a National Response to a New Soybean Pathogen, Phakopsora pachyrhizi, in North America. J Marois Fungicide Resistance in Cercospora sojina: How Did We Get Here and What’s Next? CA Bradley Exploring Mechanisms of Effector-Triggered Susceptibility in the Soybean-Sclerotinia Pathosystem. MG Roth and TJ Ross Contributed Papers (Moderator: Tom Allen) Investigating a Potential Relationship between Xylaria necrophora and Plant Parasitic Nematodes of Soybean. SN Pate, HM Kelly, E Bernard, and LA Schumacher Soybean On-Farm Foliar Fungicide Trial Summary 2020-2022. R Zaia, T Spurlock, R Hoyle, and A Rojas Identifying the Factors Influencing Soybean Disease Management Decisions in Nebraska. AG Mane, SE Everhart, and TA Jackson-Ziems Effect of Fungicides and Resistant Varieties in the Crop Profitability. E Zuchelli, J Barro, and H Kelly Effects of Fungicide Application in Drought Stress Environments on Soybean. J Adcock, H Kelly, and A Shekoofa Fungicides Sensitivity of Athelia rolfsii from Mississippi Fields. S Tripathi, T Allen, A Jimenez Madrid, T Wilkerson Quantification of Athelia rolfsii by qCPR to Assess Cultivar Susceptibility and Fungicide Efficacy for Control of Southern Blight of Soybean. A Connor, T Allen, A Jimenez Madrid, N Aboughanem-Sabanadzovic, T Irby, and T Wilkerson Insecticide Seed Treatments and Their Influence on Sudden Death Syndrome (SDS) in Tennessee Soybean. A Crowder, S Brown, and H Kelly Evaluating Fungicide Sensitivity within the Septoria glycines Population from Mississippi Soybean. J Corser, AJ Madrid, TH Wilkerson, and TW Allen Advancing Soybean Nematode, Sudden Death Syndrome, Frogeye Leaf Spot and Target Spot Management Employing the Latest Seed-Applied Technology. DS Ireland, J Simmons, and A Simon Charcoal Rot Severity and Soybean Yield Responses to Planting Date, Irrigation, and Genotypes. A Mengistu, HM Kelly, QD Read, JD Ray, N Bellaloui, and LA Schumacher Fitness Parameters within the Corynespora cassiicola Population from Mississippi Soybean. TW Allen, X Wang, M Tomaso-Peterson, and TH Wilkerson Soybean Disease Management Programs in Louisiana. GB Padgett, PP Price, D Moseley, F Collins, D Ezell, D Landry, L Lee, TM Monaghan, M Purvis, C Roider, B Woolam Abstract of Student Papers (Moderator: Kiersten Wise) Abstract of Student Poster Transcriptome Analysis Identifies Candidate Genes and Pathways Associated with Target Spot Resistance in Soybean (Glycine max (l.) Merrill). S Patel, J Patel, K Bowen, and J Koebernick Proceedings of the Southern Soybean Disease Workers are published annually by the Southern Soybean Disease Workers. Text, references, figures, and tables are reproduced as they were submitted by authors. The opinions expressed by the participants at this conference are their own and do not necessarily represent those of the Southern Soybean Disease Workers. Mention of a trademark or proprietary products in this publication does not constitute a guarantee, warranty, or endorsement of that product by the Southern Soybean Disease Workers

Proceedings of the 46th Annual Meeting of the Southern Soybean Disease Workers (March 6-7, 2019, Pensacola Beach, Florida)

Contents List of SSDW Officers Agenda for March 6-7, 2019 Abstracts for presented/contributed papers Evaluating phytotoxicity in response to fungicide by adjuvant combinations. TW Allen and TH Wilkerson Effect of delayed harvest on the seed quality of commercial soybean cultivars. JC Rupe, JA Rojas, R Holland, SR Segalin, RD Bond, and JA Still Virome of Macrophomina phaseolina isolates collected from soybean fields in Mississippi. Nina Aboughanem-Sabanadzovic, Tessie Wilkerson, Tom Allen, and Sead Sabanadzovic Genomic evidence for interspecific hybridization in Cercospora cf. flagellaris strains associated with Cercospora leaf blight of soybean. Alex Zaccaron, Kona Swift, Ahmad Fakhoury, and Burt Bluhm Identification of QoI-resistant Septoria glycines isolates. DL Neves, A Wang, JD Weems, DS Mueller, HM Kelly, and CA Bradley Genome-wide polymorphic microsatellite markers in Phytophthora sojae. Guohong Cai, Tomara J. Fleury, and Ning Zhang Identifying soybean varietal resistance to Cercospora leaf blight and describing a leaf disk assay for rapid resistance screening. Brian Ward, Paul Price III, and Thanos Gentimis Early detection of soybean sudden death syndrome using high-resolution satellite imagery. Muhammad Mohsin Raza, Sharon K. Eggenberger, Forrest W. Nutter, Jr., and Leonor F. Leandro Nematodes population distribution and densities as affected by soil type and crop rotation in Tennessee row crops. Rufus Akinrinlola and Heather Kelly The effects of Soybean vein necrosis virus (Bunyaviridae: Tospovirus) on soybean (Glycine max) yield. Rachel Guyer, Larissa Visioli, and Heather Kelly Has Cercospora kikuchii vanished in the U.S.? Comparative genomics provides new clues. Burt Bluhm, Alex Zaccaron, Kona Swift, and Ahmad Fakhoury Student papers Evaluation of field soils collected from the Mid-southern United States for differences in soybean cyst nematode egg density and reproduction. EG Roberts, A Howland, C Meinhardt, TW Allen, TR Faske, PP Price, TN Spurlock, MG Mitchum, and KM Bissonnette Soybean variety response to Xylaria sp., causal agent of taproot decline. Myra A. Purvis, Trey Price, Tom Allen, and Terry Spurlock Identification of alternative hosts for Xylaria sp., the pathogen of taproot decline of soybean. HR Becton, T Wilkerson, TW Allen, and M Tomaso-Peterson Functional genomics in Phomopsis longicolla as a tool to dissect Phomopsis seed decay at the molecular level. Marcio Zaccaron, John Ridenour, Alex Zaccaron, John Rupe, and Burt Bluhm Taxonomic diversity of Diaporthe species associated with soybean in Arkansas. Fakhir Al-Shuwaili, Marcio Zaccaron, John Rupe, and Burt Bluhm Wilting response of soybean leaves to culture filtrates of Corynespora cassiicola isolates from cotton and soybean. MN Rondon and KS Lawrence Analysis of systemic resistance caused by Bacillus sp. in Meloidogyne incognita infested Glycine max. K Gattoni, N Xiang, BR Lawaju, JW Kloepper and KS Lawrence Determining the role of new soybean germplasm in reducing losses associated with poor quality grain in Mississippi soybean. J Fomba, M Tomaso-Peterson, TW Allen, D Cook, R Smith, S Li, and TW Wilkerson Abstracts for presented posters Fungicide sensitivity screening for Corynespora cassiicola and field evaluations. Heather Kelly and Ty Smith Impact of seed treatment and seed quality on soybean emergence and yield. SR Segalin, R Holland, and JC Rupe Southern United States Soybean Disease Loss Estimates for 2018. TW Allen, K Bissonnette, CA Bradley, JP Damicone, NS Dufault, TR Faske, T Isakeit, RC Kemerait, A Koehler, HL Mehl, JD Mueller, GB Padgett, PP Price, EJ Sikora, L Thiessen, and H Young Proceedings of the Southern Soybean Disease Workers are published annually by the Southern Soybean Disease Workers. Text, references, figures, and tables are reproduced as they were submitted by authors. The opinions expressed by the participants at this conference are their own and do not necessarily represent those of the Southern Soybean Disease Workers. Mention of a trademark or proprietary products in this publication does not constitute a guarantee, warranty, or endorsement of that product by the Southern Soybean Disease Workers. Appreciation is given to the Bluhm Lab at the University of Arkansas, Fayetteville, AR, for their assistance in assembling these Proceedings