Proceedings of the 43rd Annual Meeting, Southern Soybean Disease Workers (March 9-10, 2016, Pensacola Beach, Florida)

Contents Schedule Southern United States Soybean Disease Loss Estimates for 2015. TW Allen, CA Bradley, JP Damicone, NS Dufault, TR Faske, CA Hollier, T Isakeit, RC Kemerait, NM Kleczewski, SR Koenning, HL Mehl, JD Mueller, C Overstreet, PP Price, EJ Sikora, TN Spurlock, and H Young Soilborne Disease Symposium (Tom Allen, moderator) Integrated management of sudden death syndrome. D Mueller, L Leandro, Y Kandel, C Bradley, M Chilvers, A Tenuta, and K Wise Field screening for stem canker: an outdated exercise or a necessary service for soybean growers? K Rowe and T Kirkpatrick Nematode associated diseases in soybean. C Overstreet, Edward C McGawley, D Xavier-Mis, and M Kularathna Characterization of taproot decline in southern soybean. M Tomaso-Peterson, T Allen, P Price, R Singh, and T Spurlock Frontline tactics to manage Phytophthora stem and root rot. A Robertson Graduate student research competition (Travis Faske and Terry Spurlock, moderators) Causative agents for the green stem disorder of soybeans in Louisiana. B Ward, C Robertson, and R Schneider Solubilization of cercosporin and its use for reproducing symptoms of Cercospora leaf blight of soybean. E Silva, M Liu, J Zhang, C Robertson, Z Liu, and R Schneider Effect of droplet size on foliar fungicide application in soybean. S Butler, H Kelly, T Mueller, and G Kruger Virulence assessment of strobilurin-sensitive and -resistant Cercospora sojina, the causal agent of frogeye leaf spot in soybean. N Brochard, M Tomaso-Peterson, T Allen, and R Melanson Application thresholds in controlling Cercospora sojina, the causal agent of frogeye leaf spot. J Jordan and H Kelly Assessment of ILeVO for management of root-knot nematodes in soybean. C Jackson, T Faske, M Emerson, and K Hurd Evaluating the physiological impacts of fungicide phytotoxicity in Mississippi soybean. J Mansour, M Tomaso-Peterson, A Henn., J Bond, T Irby, and T Allen Benefit of secondary nutrition in reducing Macrophomina phaseolina colonization in Mississippi soybean T. Wilkerson, M. Tomaso-Peterson. B Golden, S Lu, A Johnson, and T Allen Detection of a mycovirus from soybean rust and mycoviruses from other biotrophic fungi using a practical method for the extraction of viral dsRNA. R Herschlag, S Khankhum, and R Valverde Effect of Macrophomina phaseolina inoculation, irrigation and cultivar on soybean yield. M Zaccaron and J Rupe Contributed papers (Eduardo Silva, moderator) Phenotypic characterization of Cercospora sojina isolates collected from wide geographical areas. A Mengistu, J Ray, J Smith, and H Kelly Phenotypic characterization of Cercospora sojina isolates collected from wide geographical areas. A Mengistu, J Ray, J Smith, and H Kelly Effect of flower and pod removal on soybean senescence and comparison to green bean syndrome. J Rupe, B Holland, and A Steger Competition studies of QoI resistant and sensitive Cercospora sojina isolates, the causal agent of frogeye leaf spot. B Lin, H Kelly, H Yu, and A Mengistu Frequency and distribution of QoI resistant Cercospora sojina in Virginia. H Mehl and T Zhou A survey of Arkansas soybean nematodes, 2014-2015. K Sullivan, J Robinson, and T Kirkpatrick Nuclear proteins controlling soybean rust resistance B. Cooper Nuts, bolts, frogeye leaf spot, and the UUOT. T Allen, T Faske, C Hollier, P Price, T Spurlock, 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 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 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 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

Effect of Fungicide Applications on Grain Sorghum ( Sorghum bicolor

Field studies were conducted in the upper Texas Gulf Coast and in central Louisiana during the 2013 through 2015 growing seasons to evaluate the effects of fungicides on grain sorghum growth and development when disease pressure was low or nonexistent. Azoxystrobin and flutriafol at 1.0 L/ha and pyraclostrobin at 0.78 L/ha were applied to the plants of two grain sorghum hybrids (DKS 54-00, DKS 53-67) at 25% bloom and compared with the nontreated check for leaf chlorophyll content, leaf temperature, and plant lodging during the growing season as well as grain mold, test weight, yield, and nitrogen and protein content of the harvested grain. The application of a fungicide had no effect on any of the variables tested with grain sorghum hybrid responses noted. DKS 53-67 produced higher yield, greater test weight, higher percent protein, and N than DKS 54-00. Results of this study indicate that the application of a fungicide when little or no disease is present does not promote overall plant health or increase yield

The 13th Data Release of the Sloan Digital Sky Survey: First Spectroscopic Data from the SDSS-IV Survey Mapping Nearby Galaxies at Apache Point Observatory

The fourth generation of the Sloan Digital Sky Survey (SDSS-IV) began observations in July 2014. It pursues three core programs: APOGEE-2,MaNGA, and eBOSS. In addition, eBOSS contains two major subprograms: TDSS and SPIDERS. This paper describes the first data release from SDSS-IV, Data Release 13 (DR13), which contains new data, reanalysis of existing data sets and, like all SDSS data releases, is inclusive of previously released data. DR13 makes publicly available 1390 spatially resolved integral field unit observations of nearby galaxies from MaNGA,the first data released from this survey. It includes new observations from eBOSS, completing SEQUELS. In addition to targeting galaxies and quasars, SEQUELS also targeted variability-selected objects from TDSS and X-ray selected objects from SPIDERS. DR13 includes new reductions ofthe SDSS-III BOSS data, improving the spectrophotometric calibration and redshift classification. DR13 releases new reductions of the APOGEE-1data from SDSS-III, with abundances of elements not previously included and improved stellar parameters for dwarf stars and cooler stars. For the SDSS imaging data, DR13 provides new, more robust and precise photometric calibrations. Several value-added catalogs are being released in tandem with DR13, in particular target catalogs relevant for eBOSS, TDSS, and SPIDERS, and an updated red-clump catalog for APOGEE.This paper describes the location and format of the data now publicly available, as well as providing references to the important technical papers that describe the targeting, observing, and data reduction. The SDSS website, http://www.sdss.org, provides links to the data, tutorials and examples of data access, and extensive documentation of the reduction and analysis procedures. DR13 is the first of a scheduled set that will contain new data and analyses from the planned ~6-year operations of SDSS-IV.PostprintPeer reviewe

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

Draft genome sequence of Xylaria sp., the causal agent of taproot decline of soybean in the southern United States

The draft genome of Xylaria sp. isolate MSU_SB201401, causal agent of taproot decline of soybean in the southern U.S., is presented here. The genome assembly was 56.7 Mb in size with an L50 of 246. A total of 10,880 putative protein-encoding genes were predicted, including 647 genes encoding carbohydrate-active enzymes and 1053 genes encoding secreted proteins. This is the first draft genome of a plant-pathogenic Xylaria sp. associated with soybean. The draft genome of Xylaria sp. isolate MSU_SB201401 will provide an important resource for future experiments to determine the molecular basis of pathogenesis